CatalogIntroductionⅠ AAAA Battery Basics    1.1 What is the AAAA Battery?    1.2 Types of the AAAA Battery    1.3 The AAAA Battery UsageⅡ AAAA Battery Features, Specifications and Replacement    2.1 Features of the AAAA Battery    2.2 Technical Specifications of the AAAA Battery    2.3 Non-Rechargeable AAAA Battery    2.4 Rechargeable AAAA BatteryⅢ 4 Benefits of Powerful AAAA Battery    3.1 They Have a Great Power Output    3.2 They’re Excellent for Practical Everyday Use    3.3 AAAA Batteries are Environmentally Friendly    3.4 They Have a Durable, Heavy-Duty StructureⅣ The Best 4 Types of the AAAA Battery for You to Choose    4.1 What to Look for in AAAA Batteries    4.2 Best Overall: Energizer AAAA Alkaline Batteries    4.3 Best Value: AAAA High-Performance Alkaline Batteries    4.4 Best Rechargeable: EBL Individual Smart Battery Charger with 4 Pack AAAA Rechargeable Batteries    4.5 Streamlight Stylus AAAA Replacement BatteriesⅤ An AAAA Battery Can't Replace 2 AA BatteriesⅥ FAQ1. What is the AAAA Battery Equivalent?2. Where to Buy AAAA Batteries?3. What is the AAAA Battery Used for?4. What are the Differences Between AAAA and AAA Batteries?5. Are A23 and AAAA Batteries the Same?6. Are E96 batteries AAAA?7. Can I Use AAA Battery Instead of AAAA?8. Where Can I Buy AAAA Batteries?9. How Much does the AAAA Battery Cost?10. How Long can AAAA Batteries Last When Unused? 11. Are the 18650 and AAAA Batteries the Same thing?12. What are the Best Rechargeable AAAA Batteries?13. How to Install the AAAA Battery in Your Device?14. What is the Smallest Battery?IntroductionThe AAAA battery (also known as quadruple-A) is 42.5 mm long and 8.3 mm in diameter. The alkaline cell weighs about 6.5 g and produces 1.5 V. This size battery is also known as R8D425 (IEC) and 25 (ANSI/NEDA). This size alkaline battery is also known as Duracell type number MN2500 or MX2500, and Energizer type number E96.This article will tell you all you need to know about the AAAA battery.video:show the free AAAA batteryⅠ AAAA Battery Basics1.1 What is the AAAA Battery?The AAAA battery is a tiny cylindrical cell alkaline battery. The AAAA battery is a reasonably common battery that is manufactured by a variety of prominent companies like Duracell, Atomic, Energizer, and others. Smaller firms and private label battery manufacturers also produce a lot of AAAA batteries. Other businesses make batteries that are comparable in size to the AAAA but have various names and capacities.1.2 Types of the AAAA Battery Zinc–carbonAlkalineNiCdNiMHLi-ionIEC nameR8D425LR8D425KR8D425HR8D425 ANSI/NEDA name25D25A   Typical capacity300 mAh500–600 mAh 325–500 mAh160–170 mAhNominal voltage1.50 V1.50 V1.25 V1.25 V3.7 V1.3 The AAAA Battery UsageAAAA batteries are widely popular and are ideal for applications that require a small but stable battery. The following are some instances of AAAA usage.Medical Devices and InstrumentsCalculatorDigital ThermometerLaser PenSecurity System PanelFlashlightElectronic ToysBattery Pack Application Smoke Detectors Memory BackupA 9-volt battery is opened to reveal six LR61 cells, which are comparable to AAAA batteries.These batteries are not as popular as AAA or AA batteries and, as a result, are not as widely available.Some alkaline nine-volt battery versions have six LR61 cells joined by welded tabs. These cells are comparable to AAAA cells and can be used in some devices in their place, although being 3.5 millimeters (0.14 in) shorter.Ⅱ AAAA Battery Features and SpecificationsAAAA batteries are small, cylindrical batteries that are widely found in small electronic devices such as calculators, flashlights, laser pointers, game consoles, and others.AAAA batteries, like similar but bigger AA and AAA batteries, are available in a variety of chemistries, each with its own set of performance and features, as well as a range of pricing.2.1 Features of the AAAA BatteryAAAA batteries have physical dimensions of 8.3 x 42.5 mm (0.3268 x 1.6732 inches) and are extremely similar to:AAA battery dimensions (D x H): 10.5 x 44.5 mm,AA battery dimensions (D x H): 14.5 x 50.5,except for the AAAA, which is often smaller and longer/thinner.AAAA batteries have numerous labels, including LR8D425 (alkaline, IEC standard),  KR8D425 (NiCd, IEC standard), R8D425 (zinc-carbon, IEC standard), 25A (ANSI standard), HR8D425 (NiMH, IEC standard), MX2500, LR61, Mini, and many others, but almost all manufacturers use the 'AAAA' label to avoid any confusion.Note: Although the true LR61 battery is slightly shorter (3.5 mm, 0.14 inches) than the AAAA battery, several manufacturers identify their AAAA batteries as LR61 batteries. LR61 batteries are rarely used on their own; instead, they are frequently combined to make bigger batteries, such as 6V (4LR61) and 9V (6LR61) batteries.The chart below lists the most common chemical types of AAAA batteries:ChemistryZinc-CarbonAlkalineNickel-CadmiumNickel Metal HydrideLithium-IonRechargeableNoNoYesYesYesTypical Voltage1.5 V1.5 V1.2 V1.2 V3.6 VTypical Capacity300 mAh400 - 600 mAh200-400 mAh350 - 500 mAh170 mAh2.2  Technical Specifications of the AAAA BatteryAAAA Battery Nominal Voltage1.50 VoltsCapacity≈  500-600mAhOperating Temperature0°C – 60°C Diameter8.3mmHeight42.5mmChemistryAlkaline 2.3 Non-Rechargeable AAAA BatteriesNon-rechargeable alkaline AAAA batteries with a nominal voltage of 1.5 volts and a capacity of 400-600 mAh, or even more, are the most prevalent.The actual capacity is determined by the discharge current as well as other discharge parameters. The Energizer AAAA battery, for example (PDF datasheet, opens in a new window), has a capacity of:250 mAh when discharged with 300 mAh current325 mAh when discharged with 200 mAh current475 mAh when discharged with 100 mAh current680 mAh when discharged with 10 mAh currentAlthough zinc-carbon AAAA batteries are less expensive than alkaline AAAA batteries, most manufacturers choose alkaline AAAA batteries due to their superior performance, which includes a more steady output voltage, greater capacity, and longer shelf life (up to 5 years).2.4 Rechargeable AAAA BatteriesNickel Cadmium (NiCd), Nickel Metal Hydride (NiMH), and Lithium-ion batteries are the most common rechargeable AAAA batteries.Because cadmium is a heavy metal and a harmful contaminant, nickel-cadmium (NiCd) AAAA batteries are rarely used anymore.NiCd batteries have a very low internal impedance and can easily provide high currents. They do, however, have a relatively high self-discharge rate, a very strong memory effect, fewer charging/discharging cycles than NiMH batteries, and a lower overall capacity.Furthermore, both NiCd and NiMH batteries have a nominal voltage of 1.2 volts; several devices designed for 1.5V zinc-carbon or alkaline batteries do not function consistently when powered by 1.2 volt NiCd and/or NiMH cells.Actual capacity varies depending on discharge conditions and battery age, although it is often less than that of NiMH batteries.NiMH batteries are preferred over NiCd batteries due to advances in chemistry and the fact that NiCd batteries contain cadmium.Nickel Metal Hydride (NiMH) batteries can withstand more charging/discharging cycles than NiCd batteries and have virtually no memory effect. Furthermore, NiMH batteries have a lower self-discharge rate and a higher capacity.NiMH batteries are the preferred 1.2-volt chemistry for AAAA (and other) batteries since they do not contain hazardous heavy metals.Ⅲ 4 Benefits of Powerful AAAA BatteryFinding AAAA batteries that suit a compact device is one thing, but do they give enough power and lifespan for your needs?It's always inconvenient to have to replace batteries after such a short length of time. That is why it is recommended to seek out the highest quality possible.AAAA batteries (also known as Quadruple-A or LR61) are smaller than the more common AAA and AA types. They power small devices like LED penlights, glucose meters, laser pointers, headphone amplifiers, and powered computer styluses.Despite their small size, they can pack up to 1.5 volts of power in a slender cylindrical cell that is 42.5 mm in length and 8.3 mm in diameter.See how the AAAA alkaline battery compares to other models in terms of general characteristics: Battery TypeLengthDiameterUsesAAAA42.5 mm8.33 mmLaser pointers, LED pen lights, styluses, etc.AAA 44.5 mm10.5 mmTV remotes, cameras, MP3 players, Bluetooth, etc.AA 49.2 mm–50.5 mm13.5 mm –14.5 mmToys, remote controls, clocks, etc.C50 mm26.2 mmTorches, toys, etc.D61.5 mm33.2 mmLarge torches, transistor radios, etc.F91mm33mmHigh current devicesNow that you're more acquainted with quadruple-A battery cells, let's look at the advantages of these little yet important power sources.3.1 They Have a Great Power OutputThe alkaline battery technology utilized in quadruple-A battery cells has a capacity of 500–600 mAh, with non-rechargeable variations having a much lower discharge rate.This implies they can be used for extended periods in electrical equipment, particularly those that consume minimal amounts of power.According to a comprehensive study conducted by Battery University, alkaline-based batteries often have lower discharge currents, resulting in long-lasting performance over their usage period.AAAA alkaline batteries are normally made to last a long time. The addition of graphite, zinc, and manganese in the manufacturing process increases the density of each cell. This allows them to deliver tremendous power even at nominal voltage.3.2 They’re Excellent for Practical Everyday UseMost current electronic devices now come with built-in rechargeable batteries.This is excellent, however, when the battery pack needs to be replaced, it becomes more difficult. This is a headache that may be easily avoided by using AAAA alkaline batteries, which are inexpensive and quick to replace.ConvenienceRemovable batteries offer an advantage over chargeable types in that they can be used in situations where energy is not accessible.If you're out camping and your torch runs out of juice, a quick battery replacement will have you back up and running in no time.Because rechargeable battery choices for many products are still unavailable, the AAAA battery remains relevant and handy in everyday life.AvailabilityAAAA batteries may be more difficult to locate because they are utilized in specialized applications, but they are still generally available both online and offline.Because of our extensive range of powerful batteries, we are Australia's leading provider of high-quality replaceable cells.3.3 AAAA Batteries are Environmentally FriendlyMercury, a heavy element known to harm the environment, is no longer present in modern AAAA dry cells.The packing is done with care, using biodegradable cardboard and as little plastic as possible. This is following consumer product environmental safety norms.When delivered, the safe and environmentally friendly blister pack retains the cells in place and prevents any inappropriate contact.The batteries also come in high number packs that are both cost-effective and environmentally friendly.Consumers are recommended to properly dispose of batteries to avoid undue pollution of land or water resources.The mercury-free cells also contain recyclable ingredients that may be used to make new battery components.  3.4 They Have a Durable, Heavy-Duty Structure  Quadruple-A cells are designed to survive harsh environmental conditions. For example, the average battery cell can endure temperatures ranging from -18 C to 55 C.The batteries' outside casings are constructed with a unique coating that reduces contact resistance for increased reliability. The sturdy design allows them to operate in a variety of situations and power specialty devices adequately, even under harsh conditions.This implies that whether you live in a tropical or frigid climate, you will always have optimal performance.Good quality batteries have a long shelf life and can be stored for up to 7 years without losing capacity.The manufacturers' quality assurance ensures efficient energy output throughout the battery's lifespan.Ⅳ The Best 4 Types of the AAAA Battery for You to Choose If you've ever used a little electronic device, such as a laser pointer, an electronic stylus, or a glucose meter, you've probably benefited from the power of the AAAA battery. However, replacing these batteries is not always simple because they are far more difficult to come by than other, more common ones. We created this list to make your search for AAAA batteries easier by highlighting the top ones on the market right now.3.1 What to Look for in AAAA BatteriesThe battery life will be critical. Another crucial factor to consider is shelf life, especially if you intend to buy extra batteries to store for later use. Battery purchases can add up over time, so consider using rechargeable AAAA batteries as a cost-saving option, especially if you don't mind their shorter battery life per charge.3.2 Best Overall: Energizer AAAA Alkaline BatteriesThese Energizer AAAA Alkaline Batteries have the longest battery life and are the most trustworthy AAAA batteries available. They're suitable for smart pens and other small electronics that require a consistent voltage output for long-term functionality. They also have a longer shelf life than most budget AAAA battery options, making them an excellent choice if you intend to store batteries for future use.3.3 Best Value: AAAA High-Performance Alkaline BatteriesAAAA High-Performance Alkaline Batteries provide 1.45 volts of dependable, long-lasting power and have a 3-year shelf life. These batteries are available in four- or eight-packs and are superior to other inexpensive AAAA battery options, even giving top-tier AAAA battery supplies a run for their money. They are also leak-proof and carefully sealed for further security.3.4 Best Rechargeable: EBL Individual Smart Battery Charger with 4 Pack AAAA Rechargeable BatteriesThe EBL Individual Smart Battery Charger with 4 AAAA Rechargeable Batteries is a terrific alternative for individuals looking for quality AAAA rechargeable batteries and a versatile charger to keep them operational. When compared to other rechargeable manufacturers, the 400-mAh AAAA batteries may be recharged over 1,000 times. The charger is also compatible with AA and AAA rechargeable batteries and includes several useful safety measures.3.5 Streamlight Stylus AAAA Replacement BatteriesThe Streamlight Stylus AAAA Replacement Batteries are an excellent choice for people looking for AAAA batteries to power an electronic stylus or penlight. These batteries last a long time and are dependable, especially given their low price. These batteries are particularly ideal for cameras and medical devices, and they work well in cold climates.Ⅴ An AAAA battery can't Replace 2 AA batteriesIt's a bit foolish to think that AAAA batteries are equivalent to two AA batteries in any way. The inverse is true.AAAA batteries have the same voltage as AA batteries but only about half the energy. When you connect two AA batteries in series, you obtain 3V, which a single AAAA battery can not provide. They will not be able to share the same placeThe battery size is not proportional to the letter identification. An AA battery is, in reality, significantly larger than an AAAA battery. Even if you had a couple of 1/2 AA batteries (fractional sizes exist for commercial and rechargeable batteries, but not for Wal-Mart batteries), you couldn't use them in place of an AA battery. To fit in an AA socket, two 1/2AA cells would have to be stacked end-to-end in series. That would add the voltages together, giving you a 3V battery instead of the predicted 1.5V battery.IEC and ANSI standards specify battery sizes, however many began as proprietary sizes and were given a letter designation when approved as a standard. The AAA, for example, was introduced in 1917 but did not become a standard until the 1960s. Most common batteries are also known by other names; for example, before 1980, the AAA was known as the U16 cell in the United Kingdom.Ⅵ FAQ1. What is the AAAA Battery Equivalent?Batteries of the same size and capacity as AAAA are referred to in a few different ways depending on the manufacturer. E96, LR8D425, MN2500, and MX2500 are direct replacements for AAAA. The only difference between these batteries and AAAA batteries is their nomenclature.Several batteries are the same size and dimensions as the AAAA battery, but they are not perfect counterparts or direct replacements because they are made of different chemistries that offer varied performances for different applications.Examples include lithium and other rechargeable types. Although these batteries have the same size as an AAAA battery, the differing chemistry allows for variable drain performance, allowing the battery to run for extended periods in low-use applications such as a wall panel. These batteries may not work in all applications that require an AAAA battery.Always reference the owner's handbook of your device to discover the exact battery that is needed for the best results.2. Where to Buy AAAA Batteries?AAAA batteries are very common and well-liked. This implies that a large range of manufacturers produces these batteries, and a wide range of shops sell them. It is critical to remember that not all AAAA batteries are made equal, nor do all sellers have the same commitment to quality. To avoid low-quality or worse, counterfeit batteries, only get your batteries from a highly reputable merchant who sells only the highest-quality brands.3. What is the AAAA Battery Used for?AAAA batteries are mostly used in small specialty devices such as glucose meters, laser pointers, compact headphone amplifiers, computer styluses, and a variety of other small-factor gadgets. 4. What are the Differences Between AAAA and AAA Batteries?Despite having a comparable physical architecture, an AAAA battery is approximately 40% less in weight and thickness than a AAA cell.In addition, quadruple-A batteries are utilized in tiny specialized gadgets such as styluses and glucometers, as opposed to AAA batteries, which are used in common devices such as remote controls and toys.It is important to note that, despite their similarities, these two battery types are not interchangeable. 5. Are A23 and AAAA Batteries the Same?These are two distinct types of batteries. See the table below for the key distinctions:Battery TypeOther NamesVoltageDimensionsCommon UsesAAAALR61R8D4251.5 V–3.7 VLength—42.5mmDiameter— 8.33mmPowered computer styluses, glucometers, laser pointers, LED penlightsA23LRV08GP23A23AEMN211.25V1.5VLength—28.5mmDiameter— 10.33mmBluetooth headsets, garage door openers, keyless car entry systems, home security systems6. Are E96 batteries AAAA?Energizer E96 Batteries are constructed with Energizer Power Seal Technology to provide longer-lasting performance than ordinary alkaline batteries. These AAAA batteries are a substitute for the LR8D425, MN2500, and MX2500.7. Can I Use AAA Battery Instead of AAAA?AAAA is the next size down from AAA. They cannot be used interchangeably.8. Where Can I Buy AAAA Batteries?They are available in convenience stores and supermarkets, although due to their specialized nature, availability is not always guaranteed. You may also buy them online from places like Battery Specialists.9. How Much does the AAAA Battery Cost?An alkaline twin pack costs $7.95 to $9.85, while single rechargeable 300mAh NiMH batteries start at $6.45. Prices may differ from one location to the next.10. How Long can AAAA Batteries Last When Unused? Most alkaline batteries should be able to survive between 5 and 10 years in their original packaging and still function properly.However, it is best to keep them in a cool, dry place away from excessive moisture, heat, or potentially dangerous corrosive substances.11. Are the 18650 and AAAABatteries the Same thing?No, there are two kinds. 18650 is similar to an elongated AA. AAAA is an elongated AAA with the number 041660 that has the same transactions.An AAAA battery has a maximum voltage of 1.5 volts, whereas a 18650 battery has a nominal voltage of 3.7 volts (mid-range) and can reach 4.2 volts. An AAAA battery measures 8.3 x 42.5mm, while 18650 measures 18 x 65mm. The AAAA battery is not usually rechargeable, but the 18650 is designed to be charged/discharged continuously at its nominal voltage. The AAAA battery has a capacity of 635 mah, while the 18650 battery has a capacity ranging from 1000 to 3500 mah. The AAAA battery is intended for laser pointers or other devices with low current demand. The 18650 is intended for usage in circumstances requiring a large draw. The AAAA is an alkaline battery, whereas the 18650 is a lithium battery.12. What are the Best Rechargeable AAAA Batteries?Is your "best" a consideration of worth, or is it a "who cares about money?"My practice emphasizes obtaining the best value while balancing price and capability. I try to buy generic house-brand batteries instead of expensive OEMs like Duracell or Energizer.13. How to Install the AAAA Battery in Your Device?Determine the positive and negative ends of the battery first. The flat side (sometimes with markings) of a common Alkaline AAAA battery is normally the positive side. A little round protrusion should be evident on the opposite side. Typically, the side is the negative end. You can easily align the positive and negative ends of the battery with the relevant markings on your device now that you've determined the positive and negative ends of the battery. Please keep in mind that certain gadgets feature small metallic tabs to help with battery retention and function. These tabs must remain unharmed and undamaged, as doing so may jeopardize the performance of your device.If you happen to move this tab slightly out of place, you can generally fix it by gently readjusting it back into the proper alignment.14. What is the Smallest Battery?The nano battery, at 150 nanometers across, is hundreds of times thinner than a human hair and more than 60,000 times smaller than a AAA battery. How many "A"s are there? Rice University invented the little battery, which is a hybrid of a battery and a supercapacitor.         

CatalogIntroductionⅠ CR123A Battery Basics    1.1 What is a CR2 Battery?    1.2 CR2 Battery Features and SpecificationsⅡ CR2 Lithium Battery Replacement    2.1 CR2 Batteries Cross Reference Chart    2.2 CR2 Battery Chemistry    2.3 Rechargeable CR2 Battery Replacement    2.4 15270 ChemistriesⅢ 11 Safety Precautions to Take While Using the CR2 Battery?Ⅳ Best CR2 Battery For Everyday ElectronicsⅤ FAQ    5.1  Are CR2 Batteries Rechargeable?    5.2  How Long does the CR2 Battery Last?    5.3 What Battery is Equivalent to the CR2 Battery?    5.4 Are CR2 Batteries the Same as CR123A?    5.5 Are C2 and CR2 Batteries the Same?    5.6 What Uses the CR2 Battery?    5.7 Where to Buy the CR2 Battery?    5.8 Is the Energizer 123 the Same as CR2?    5.9 What Warnings Should I Consider While Using Lithium Batteries Such As Lithium-Ion 15270?IntroductionThe CR2 battery, which is found in cameras,weapon-mounted lights, golf rangefinders, EDC flashlights, and security devices, is revered around the world. A standard cylindrical lithium battery is referred to as a CR2. This is the type of battery used in cameras (such as the CR2). This is due to their small size, which makes them ideal for electronic devices on the go. A CR2 lithium battery's shelf life is determined by its model and manufacturer. The Energizer brand, for example, puts more strain on its batteries than other brands, ensuring comparative endurance under extreme conditions.Ⅰ CR2 Battery Basics1.1 What is a CR2 Battery? CR2 battery and Pad replacementThe CR2 battery is a cylindrical lithium cell with measurements of 27mm x 15.6mm. In simple terms, the CR2 battery resembles a smaller version of a D Cell Battery, or, to put it another way, a can. These batteries can be used in a wide range of situations. They're commonly found in cameras that require a high-capacity lithium battery, as well as in a variety of industrial applications. Because of its numerous applications, this battery is extremely popular and, as a result, can be difficult to locate. Panasonic, Duracell, and Energizer are just a few of the big and small brands that make them. This article will provide you with all of the information you need to know about the CR2 battery.CR2 lithium battery1.2 CR2 Battery Features and SpecificationsThe CR2 battery has a nominal voltage of 3.0 volts and a cutoff voltage of 2.0 volts. It is a non-rechargeable lithium battery.The CR2 battery has a diameter of 15.6 mm and a height of 27 mm (1.063 inches). The CR2 battery typically has a capacity of 800 to 850 mAh, though this varies depending on the device's cutoff voltage and drain conditions (current strength, temperature, and similar).Many manufacturers use the standard CR2 label but add a letter or two to emphasize the brand, for example, when labeling their batteries.The 1CR2, DL-CR2, DLCR2, 5046LC, CR15H270, EL1CR2, KCR2, and other CR2 battery equivalents are commonly used.Manganese-dioxide lithium 15.6 x 27 mm non-rechargeable cylindrical batteries are the most common, with carbon-monofluoride lithium 15.6 x 27 mm non-rechargeable cylindrical batteries ('BR2 battery') being extremely rare.The shelf life of CR2 batteries varies depending on the model and brand, but it is typically 3+ years, with some brands having 10+ year shelf lives, making them ideal for standby or emergency devices (panic lights, EDC flashlights, medical equipment, etc.).CR2 batteries are fairly common, and most reputable brands offer them, so finding good ones from online shops and stores should not be a problem.CR2 Battery Nominal Voltage:3 VoltsCR2 Capacity (Lithium)≈  800 mAhCR2 Operating Temperature:-40°C – 60°C CR2 Height:27.0 mmCR2 Width (Diameter):15.60  mmCR2 Chemistry:Lithium Manganese Dioxide (Li/MnO2                                                  Technical Specifications Of The CR2 BatteryⅡ CR2 Lithium Battery Replacement2.1 CR2 Batteries Cross Reference ChartThe table below compares and contrasts the most important characteristics of several popular CR2 battery models.A nominal voltage of 3.0 volts, a cutoff voltage of 2.0 volts, and a very low self-discharge rate are all included in the chart.Also, while the 'official' operating temperature range is usually between -40°C and +70°C, it is important to remember that the performance of these batteries is temperature-dependent, and they perform best at room temperatures (20-25°C), with temperatures between -10°C and 50°C being avoided if at all possible.BatteryCapacityDischarge CurrentsDatasheetEnergizer CR2800 mAh, 100Ω @21°C down to 2.0V1000 mA max. continuous1200 mA, 3s/7s, @21°C, 760 cycles, down to 1.8V1800 mA, 3s/7s, @21°C, 400 cycles, down to 1.8V2500 mA max. pulseEnergizer CR2GP CR2800 mAh, @10 mA @23°C down to 1.8V10 mA continuous900 mA, 3s/27s, @23°C, 900 cycles, down to 1.6VGP CR2Panasonic CR2850 mAh20 mA continuous900 mA, 3s/27s, @20°C, 1000 cycles, down to 1.8VPanasonic CR2Varta CR2850 mAh, @20mA @20°C down to 2.0V20 mA continuous900 mA, 3s/27s, @25°C, 900 cycles, down to 1.5VVarta CR2As can be seen, the CR2 battery can easily deliver continuous currents of 10-20 mA.They are, however, exceptional high-discharge performers, with the best models capable of 900-1000 cycles (3 seconds ON, 27 seconds OFF) at 1.5-1.8 volts at room temperature.Some manufacturers (such as Energizer in this chart) stress their batteries even more by testing them with 3s/7s cycles; even under such conditions, Energizer CR2 batteries have an actual capacity of 760 mAh (down to 1.8V), which is very similar to the nominal capacity of 800 mAh (down to 2.0V).CR2 batteries are commonly used in high-drain devices such as cameras, range finders, compact EDC flashlights, and similar devices due to their performance.2.2 CR2 Battery ChemistryThe 3v CR2 battery that measures 27mm in length and 15.6mm in width (diameter). Lithium, alkaline, and Li-Ion batteries are used in its technology. Due to the general manganese oxide in its positive electrode and the spiral nature of its polar plate, it has a very high discharge rate.A Positive Temperature Coefficient (PTC) safety device is also built into the battery to limit current during short circuit conditions.Part NumberCR2Chemical SystemLithium / Manganese Dioxide (Li/MnO2)Typical Lithium content0.28 gramsNominal voltage (Open circuit voltage)3.0VTypical capacity800mAH (to 2.0volts, rated at 100 ohms at 21℃)Nominal capacity850mAHContinuous drain (standard discharge current)20mADimensions15.6 mm (max diameter) 27.0 mm (max height)Typical Weight11.0gTypical volume5.2 cm3Temperature rangeDischarge: -40℃ to 60℃ Storage: -40℃ to 75℃Maximum continuous discharge current1000 mA continuous (2500 mA pulse)Maximum reverse charge2 µA2.3 Rechargeable CR2 Battery ReplacementA few letters can be added to CR2 to emphasize the brand on the label in some cases. 1CR2, KCR2, DLCR2, and other equivalents are possible.The 15270 (or RCR2) is commonly referred to as the "rechargeable CR2." It's a rechargeable lithium-ion battery with a single prismatic cell and a one-parallel, one-series configuration.In comparison to primary CR2 models, it is slightly smaller (15 by 26.6mm). It can be charged multiple times without experiencing the "lazy battery effect."Other technical characteristics are:Voltage: 3.7V (nominal)Capacity nominal: 450 mAhStandard: 0.2C, continuous: 1C Constant discharge current0 to 45°C for charging; -20 to 60°C for dischargeApproximate cell weight: 20 g2.4 15270 ChemistriesThe most common chemistries are lithium manganese oxide (LiMn2O4) and lithium iron phosphate (LiFePO4).The battery on the 15270 is protected from overheating and overcharging by a built-in Battery Management System (BMS). As a result, a "protected" 15270 battery has a capacity of 400-600 mAh.The non-rechargeable CR2 and the 15270 are fully compatible thanks to a BMS that reduces the output voltage to 3.0V.Rechargeable 15270s have a reputation for lasting longer, providing better value for money, and outperforming their primary CR2 counterpart.Ⅲ 11 Safety Precautions to Take While Using the CR2 Battery?The CR2 battery is designed to be explosion-proof. However, due to the explosive nature of lithium metal and organic electrolytes within the product packaging, special instructions must be followed.1Do not light the batteries on fire. They are prone to catching fire.2Do not charge anything.3Avoid short-circuiting.4Do not attempt to disassemble.5Avoid exposing batteries to extreme temperatures, including direct sunlight. 30°C is the recommended storage temperature. Temperatures above 45°C should be avoided. Temperatures below -40°C also deform the plastic parts and may cause leakage.6Avoid storing the batteries in places with high humidity. To avoid self-discharge due to corrosion or a decrease in insulation, storage humidity should not exceed 70%.7KEEP BATTERIES OUT OF THE REACH OF CHILDREN. If a child swallows a battery, seek medical attention immediately.8Never mix old and new batteries or batteries from different series.9Do not use a wire to connect the negative and positive electrodes. Carry batteries separately from metallic objects such as necklaces, coins, and so on.10Never use an ultrasonic wave washer to clean the battery.11Always follow the instructions on the package for safe usage.Ⅳ Best CR2 Battery For Everyday ElectronicsThe Energizer CR2 lithium battery is ideal for use in commonplace electronics. It will always provide a consistent source of power to any device. The 800 mAh rating ensures that this battery can power a device for extended periods.These batteries are not only powerful but also very durable and have very long battery life. They also slowly discharge power to the device. Have the ability to retain power for up to ten years when stored. Perfect for cameras, CD players, and portable speakers.Ⅴ FAQ5.1 Are CR2 Batteries Rechargeable?Most CR2 batteries cannot be recharged, but some can. Typically, the label of a CR2 battery will indicate whether or not the battery is rechargeable. Rechargeable batteries are also referred to as "secondary batteries," whereas non-rechargeable or single-use CR2 batteries are referred to as "primary batteries." It is critical to determine whether a CR2 battery is a "primary battery" or a "secondary battery." Attempting to recharge a non-rechargeable battery (particularly a lithium battery) can result in a fire, explosion, or the destruction of your charger/device. Even when using a high-quality rechargeable battery, it is critical to use the proper charger to avoid problems. Using the wrong or incompatible charger for your CR2 battery can cause the battery to malfunction or stop working entirely.5.2 How Long does the CR2 Battery Last?The lifespan of a CR2 battery is heavily dependent on the battery's manufacturing quality and application. Assuming the battery is new and purchased from a reputable source, there is still a wide range of service life available depending on usage. A CR2 battery may last less than a month for a frequent application that requires a large amount of energy, such as a high lumen flashlight. With the right conditions, the service life of a more passive application, such as a home security alarm panel, can be over a year. Essentially, how long your CR2 battery will last is determined by what you require it to do.5.3 What Battery Is Equivalent to the CR2 Battery?DLCR2, KCR2, ECR2 1CR2, and 5046LC could be direct replacements and equivalents for the CR2 battery. All of these batteries are direct replacements for the CR2 battery and are classified as primary or non-rechargeable batteries. The 15270 and 15266 batteries are rechargeable or secondary versions of the CR2. These rechargeable CR2 batteries have a slightly lower capacity (lower mAh) than non-rechargeable versions, but they will still fit in and power the same devices. The non-rechargeable version has a longer single-use life, but the rechargeable CR2 battery saves you money over time.5.4 Are CR2 Batteries the Same as CR123A?The CR2 battery is not interchangeable with the CR123A battery. Because the CR2 battery is slightly shorter than the CR123A battery, it will not fit in the majority of applications that require a CR123A battery. Furthermore, the CR123A battery will deliver approximately 50% more output than the CR2 battery, implying that even if you were able to seat a CR2 battery into a CR123A device, it would not be able to deliver the full power required, and your device would either function poorly or not at all. These batteries do have some similarities, such as the fact that they are both made of lithium manganese dioxide and are both 3-volt batteries.5.5 Are C2 and CR2 Batteries the same?The CR2 battery is not commonly referred to as a C2, but some small manufacturers do sell batteries labeled C2 that are identical to the CR2. The CR2 battery is typically designated by the majority of major manufacturers. In addition, certain retail packaging for C cell batteries may cause some confusion. Some retail packs of two C batteries may have C 2 written on the top of the packaging. This does not imply that it is the same as a C2 (CR2) battery, but rather that there are two C cell batteries in the pack.5.6 What Uses the CR2 Battery?Military, industrial, medical, and consumer applications are all possible with the CR2 battery. The CR2 battery is used in weapon lights,  laser designators, optics, laser rangefinders, and communications devices in the military. Alarm batteries and power for various instruments are medical applications for the CR2 battery. Lights, alarms, cameras, and memory backup applications are just a few examples of industrial and consumer uses.5.7 Where to buy the CR2 Battery?CR2 batteries are extremely popular and common. This means that these batteries are made by a wide range of manufacturers and sold by a wide range of retailers. It is important to remember that not all CR2 batteries are created equal, and not all retailers are equally committed to quality. To avoid low-quality or, worse, counterfeit batteries, it is critical to purchase your batteries from a highly reputable retailer that sells only the highest quality brands.5.8  Is the Energizer 123 the Same as CR2?No, it isn't.The Energizer 123 (or CR123) battery is 34.5mm long, while the CR2 is only 27mm long. As a result, even though both claim a voltage of 3V, the CR123 cannot be used in place of the CR2.5.9 What Warnings Should I Consider While Using Lithium Batteries Such As Lithium-Ion 15270?Before the first use, fully charge the battery.Charge the battery frequently and with high-quality chargers. When charging, Do not leave it unattended.Avoid storing your Li-ion battery fully charged for extended periods.Keep it cool and dry, away from heat.Insert a Li-ion battery gently. Use no force.    

CatalogIntroductionⅠ CR123A Battery Basics    1.1 What is a CR123A Battery?    1.2 Maximum Capacity of the CR123A Battery    1.3 The Manner of Applications of the BatteriesⅡ CR123A Battery Specifications    2.1 Technical Specifications of the CR123A Battery    2.2 Non-Rechargeable CR123A Battery Specifications    2.3 Rechargeable CR123A Battery SpecificationsⅢ Top 4 Considerations to Choose the CR123A Lithium BatteryⅣ Choosing the Best CR123A BatteriesⅤ Shopping for CR123A BatteriesⅥ Why Use CR123A Batteries for Arlo Cameras    6.1 Higher Voltage    6.2 No Voltage Drops    6.3 Lighter Weight    6.4 Longer Battery LifeⅦ FAQ    1. Why is it Called a CR123A?    2. Are there Rechargeable CR123A Batteries?    3. Can I Use 2 x CR123A Batteries Instead of an 18650 Battery?    4. Why do I See Names like EL123A, 123A, and K123LA?    5. Are all CR123A Batteries the Same?    6. How Long does a CR123A Battery Last?    7. What Battery is Equivalent to the CR123A Battery?    8. Are CR2 Batteries the Same As CR123A?    9. Where to Buy CR123A Batteries?    10. Are CR123A and CR123 Batteries the Same?    11. Can you Recharge a CR123A Battery?IntroductionCR123A Batteries, also known as 123 batteries, are high-capacity lithium-ion batteries that are widely used in security alarm systems. They are the preferred choice of PIR sensor manufacturers in wireless alarm systems due to their high capacity and long life. A CR123A battery can last up to three years in this application before needing to be replaced.This article will teach you everything you need to know about the CR123A battery.Top 5 batteries that will blow your mind!By this video, you will know which CR123A Battery is best for you. Ⅰ CR123A Battery Basics1.1 What is a CR123A Battery?The CR123A battery is a cylindrical cell lithium battery. The shape is reminiscent of a smaller version of a C Cell Battery, or, to put it another way, it resembles a can. These batteries are widely used in a variety of applications, ranging from medical devices to military-grade technology. Because this battery has so many applications, it is very popular and, as a result, can be difficult to find in stock. Furthermore, the lithium nature of the CR123A battery allows for a shelf-life of up to ten years before use, making storage simple. The CR123 battery, also known as CR17345 and DL123A, is used in professional photography equipment. It measures 34mm in height and 17mm in diameter, has a nominal capacity of 1500mAh and can be used to replace the SF123 and Innotek BAT-003 batteries. CR123A battery1.2 Maximum Capacity of the CR123A BatteryCR123A cells have a higher battery capacity, which is typically rated at 1500 mAh. In general, a higher capacity RCR123A cell will have a lower maximum drain rating than a lower capacity RCR123A cell.1.3 The Manner of Applications of the BatteriesThe most noticeable difference between the two types of CR123 batteries is how they both work. A CR123A power cell is a type of battery that is only intended to be discharged, and it must be properly disposed of once it is drained and empty.RCR123A cells, on the other hand, are rechargeable batteries that can be discharged and recharged multiple times. As a result, they are an excellent choice for small electronic devices that are frequently used. Because of this distinction, each type is suitable for a variety of applications.Ⅱ CR123A Battery Specifications2.1 Technical Specifications of the CR123A BatteryCR123A Battery Nominal Voltage:3.2-3.3 VoltsCR123A Capacity (Lithium)≈  1550 mAhCR123A Operating Temperature:-20°C – 75°CCR123A Height:34.2 mmCR123A Width (Diameter):17.0  mmCR123A Chemistry:Lithium Manganese Dioxide2.2 Non-Rechargeable CR123A Battery SpecificationsA non-rechargeable CR123A cell typically has a capacity of 1500 mAh and a nominal voltage of 3 volts. It has a life expectancy of seven to ten years, making it an excellent choice for home security devices and standby electronics that can be used in emergencies.A non-rechargeable CR123A cell is also designed to withstand high current drains, making it an excellent choice for devices that require a large amount of power in a short period.2.3 Rechargeable CR123A (RCR123A) Battery SpecificationsAn RCR123A or rechargeable CR123A battery typically has a capacity of 500 to 800 mAh and a voltage of 3.6 or 3.7 volts. However, as a cell designed to be recharged and used multiple times, RCR123A is a desirable power cell that is recommended for frequently used devices.Ⅲ Top 4 Considerations to Choose the Cr123A Lithium BatteryCR123A batteries are fully charged and ready to use when they arrive in the package. They will typically keep a full or near-full charge for at least ten years. They will also keep a fully charged state for roughly the same amount of time even when stored inside the flashlight.Because CR123A batteries have more capacity than rechargeable batteries, they will have longer run times. Because the voltage remains more constant as the capacity of the battery is depleted by use, the light will typically continue to operate at a reduced output even as the capacity of the battery becomes quite drained.When rechargeable 16340/18650 batteries are stored for up to a year, they gradually lose some of their charges, often up to 30%. Their capacity degrades quickly during use, but they keep the voltage at or above their nominally rated level very well. Rather than gradually dimming, your light will continue to provide full output until the batteries are depleted, at which point it will abruptly stop.A standard CR123A battery may be better for you if your tactical light needs a battery that is ready for immediate use, with full capacity even if it may sit relatively unused for periods.Ⅳ Choosing the Best CR123A BatteriesCR123A batteries are widely used in modern digital cameras, security systems, and even high-output flashlights. Even though there are a plethora of CR123A battery options available, the quality and battery life are far from standard.Best CR123A Battery | Batteries (Top 7 best in 2021)Ⅴ Shopping for CR123A BatteriesBattery life and shelf life are both important considerations when shopping for CR123A batteries because they determine how long your batteries will last while being used in electronic devices or sitting in storage. Another important consideration is compatibility, as not all rechargeable CR123A batteries will work in devices that accept standard CR123As. It is best to check your device's owner's manual before purchasing to ensure that a rechargeable option will work for your device. Finally, consider your electronic device's power consumption. If it consumes a lot of power, consider using high-quality batteries with longer battery life or a rechargeable option to save money in the long run.Ⅵ Why Use the CR123A Battery for Arlo Cameras6.1 Higher VoltageThe CR123A battery has a higher voltage than other batteries, so they can provide enough energy to your Alco Security Camera. The voltage of CR123A batteries is 3.0 volts (nominal). The most common voltage for a CRA123A battery is 3.7 volts.6.2 No Voltage DropsThe constant voltage curve of a Lithium CR123A battery allows for high power. Voltage drops can cause erratic performance, putting a security system's performance in jeopardy, especially if it's connected to a wireless network.6.3 Lighter WeightThe CR123A is lighter than most batteries. Most CR123A batteries are significantly lighter than AA batteries.6.4 Longer Battery LifeThe CRA123A has a battery life of 3 – 5 years on average, which is why it is known as a camera battery. When compared to other types of batteries, these batteries are more durable and last longer.Ⅶ FAQ1. Why is it Called a CR123A?The name of a CR123A cell, like that of many other batteries, contains a wealth of information about its chemistry and size. The CR denotes the battery's chemistry, a prefix used by the IEC to indicate the use of lithium chemistry, specifically LiMnO2. The 23A refers to the battery size, which in this case means that the CR123A is two-thirds the length of a standard A-size battery.2. Are there Rechargeable CR123A Batteries?Yes, but they're also known as RCR123A or 16340 batteries. They are 16mm shorter than CR123As, use lithium-ion chemistries, and typically have lower energy capacities. The RCR123A battery typically has a voltage of 3.6–3.7 volts, and not all flashlights and cameras can use both CR123As and their rechargeable counterparts.3. Can I Use 2 x CR123A Batteries Instead of an 18650 Battery?Occasionally, but not always. Some 18650 battery-powered flashlights and devices have long, spring-loaded interiors to account for varying battery lengths, allowing for the use of two CR123A batteries. Because 18650s are slightly thicker than CR123As, a battery sleeve may be required for a secure connection. We always indicate whether our flashlights are compatible with multiple battery sizes so you don't buy the wrong size cell, and you can shop for CR123A flashlights here.4. Why do I See Names Like EL123A, 123A, and K123LA?These are just variations on CR123As, which can also be referred to as 123, 123A, CR23, and other abbreviations. Some battery manufacturers brand their products, such as Duracell's DL123A and Energizer's EL123A.5. Are all CR123A Batteries the Same?No. The size, terminals, and nominal voltage of the CR123A battery are the same as for any other size. Any CR123A battery should fit in any device that requires one, but this is not always the case, as I discovered when I tried to use some cheap ones in my light meter. However, just like an AA battery, there are cheap ones that may only last an hour or two in a device, whereas a good name brand one may last 5 times as long. Most of the time, you get what you pay for. That Duracell battery will outlast an Amazon Basics or Dollar Store brand battery. And, because a CR123A is a 3-volt battery, some are a single lithium cell, while others are two alkaline cells connected in series. Both are functional, but lithium is more powerful.6. How Long does a CR123A Battery Last?The lifespan of a CR123A battery is heavily dependent on the battery's manufacturing quality and application. Assuming the battery is new and purchased from a reputable source, there is still a wide range of service life available depending on usage. A CR123A battery may last less than a month for a frequent application that requires a large amount of energy, such as a soldier's weapon light. With the right conditions, the service life of a more passive application, such as a home security alarm panel, can be over a year. Essentially, how long your CR123A battery will last is determined by what you require it to do.7. What Battery is Equivalent to the CR123A Battery?Although there are no direct replacements for the CR123A battery, there are batteries that are similar in size but have different chemistries and capabilities. The 16340 battery, for example, is the same size and shape as the CR123A, but it is made of lithium-ion rather than lithium manganese dioxide. This means the 16340 is rechargeable and can be used in the same places as a CR123A. Even though the 16430 battery will fit, it may not perform as well as a CR123A battery or have the same life span.8. Are CR2 Batteries the Same As CR123A?The CR2 battery is not interchangeable with the CR123A battery. Because the CR2 battery is slightly shorter than the CR123A battery, it will not fit in the majority of applications that require a CR123A battery. These batteries do have some similarities, such as the fact that they are both made of lithium manganese dioxide and are both 3 volt batteries. 9. Where to buy CR123A Batteries?CR123A batteries are very common and well-liked. This means that a wide range of manufacturers produces these batteries, and a wide range of retailers sell them. It's important to remember that not all CR123A batteries are created equal, and not all retailers are equally committed to quality. To avoid low-quality or, worse, counterfeit batteries, only purchase your batteries from a highly reputable retailer who sells only the highest-quality brands.10. Are CR123A and CR123 Batteries the Same?Yes. The CR123A and CR123 batteries are interchangeable. These batteries are also known as 123, 123A, DL123, DL123A, and SF123.The letter C in CR123A and CR123 denotes a lithium battery. The letter R stands for round, and the number 123 represents one-third. So 123 batteries are one-third the size of cell batteries. Some manufacturers add the letter A to indicate that the cell is an A cell.11. Can you Recharge a CR123A Battery?The CR123A is a non-rechargeable 3v lithium cell with a 17mm diameter and 34.5mm length. Because it is not rechargeable by definition, the answer is no.However, rechargeable batteries of the same size and voltage as a CR123A are available. A 16340 Li-ion cell, for example, is 16mm diameter and 34.0mm long, with a fully charged voltage of 3.7v, so this would be a compatible battery for some devices - you'd need to check with the device manufacturer.     

SummaryUnderstanding the 5-pin relay is essential for modern automotive electrical work, from restoring classics to upgrading 2026 electric vehicle accessories. This guide covers the fundamentals of SPDT relays, detailed wiring instructions for positive and negative triggers, differentiation between relay types, and comprehensive troubleshooting using a digital multimeter.IntroductionManufactured in Europe to exacting original equipment standards under ISO9001 supervision, modern 5-pin relays are designed for resilience. These components feature silver contacts for long-lasting performance and typically include a removable metal mounting tab for versatile installation.As of 2026, high-quality automotive relays maintain a 500,000+ cycle rating and often include a braided power strap for increased reliability under thermal stress. They are available in various amp ratings (commonly 30A, 40A, or high-current 60A) in 12V, 24V, and occasionally 48V configurations for mild-hybrid systems. Most now include resistor or diode-style circuit protection to prevent voltage spikes from damaging sensitive onboard computers (ECUs).Figure 1: Standard automotive 5-pin relayⅠ What are 5 Pin Relays Used for?A relay with five pins typically utilizes two pins to operate the electromagnetic coil and three pins to function as an SPDT (Single Pole Double Throw) switch. This configuration includes:Common Contact (30): The main power source.Normally Open (NO) Contact (87): Connected only when energized.Normally Closed (NC) Contact (87a): Connected when unenergized.This setup is technically referred to as a Form C contact.While SPST NO (Single Pole Single Throw, Normally Open) relays are common for simple on/off tasks, the SPDT 5-pin relay allows for complex switching. It can toggle power between two circuits (e.g., switching between Daytime Running Lights and High Beams) or create a disabling circuit (e.g., a starter kill switch).In 2026, complex multi-pole relays like 2PDT and 4PDT are still used in industrial applications, but the 5-pin SPDT remains the workhorse of the automotive aftermarket.1.1 Why Do You Need a Relay?Relays are crucial in the automotive industry to separate high-amperage circuits from low-amperage controls. They allow you to use a delicate, low-current switch (or a signal from a Body Control Module) inside the cockpit to control a high-power device like a fuel pump, cooling fan, or light bar located elsewhere.Key Benefits:Voltage Drop Reduction: By keeping high-current wires short (battery to relay to component), you minimize voltage loss.Safety: If a 30A circuit were wired directly through a dashboard switch, the heat generated could melt the switch or cause a fire. A relay allows a tiny 5 amp signal to safely control that 30 amp load.The device depicted above is an electromagnetic attraction type relay. When the coil is energized, it generates a magnetic field that attracts a movable armature, physically closing or opening the contacts.Ⅱ How to Wire a 5 Pin RelayThe standard Bosch-style 5-pin relay uses an SPDT configuration. Here is the universal pinout logic:Pins 85 and 86: The Control Circuit (Coil). Sending power and ground to these creates the magnetic field.Pin 30: Common Power (Input). Usually connected to the battery via a fuse.Pin 87a: Normally Closed (Output). Has power when the relay is OFF.Pin 87: Normally Open (Output). Has power when the relay is ON.Typical Horn Circuit Example:Pin 30 connects to the battery (+) via a fuse. Pin 87 connects to the horn (Load). Pin 86 connects to 12V (+), and Pin 85 connects to the horn button (which grounds the circuit when pressed). When you press the horn, the coil activates, bridging Pin 30 to Pin 87, and the horn sounds.Note: In modern automotive design, it is standard practice to place the switch on the "ground" side (Pin 85) rather than the 12V side to reduce the risk of short circuits in the dashboard.2.1 5 Pin Relay DiagramThis diagram is versatile and applies to various 2026 applications, including:Reverse Camera Triggers: Activating a camera screen only when the reverse lights engage.Amplifier Turn-Ons: Using a remote output wire to power high-wattage audio equipment.High-Draw Accessories: Powering LED light bars, air compressors, or electric water pumps.2.2 How to Wire a 5 Pin Relay with a Positive TriggerIn a positive trigger system, the switch sends 12V (+) to the relay to activate it.Pin 30: High current 12V (+) input from battery (Fused).Pin 86: Signal wire from your dash switch (sends 12V when ON).Pin 85: Connected to Chassis Ground (-).Pin 87: Output to accessory (Lights/Fan/Horn).Pin 87A: Unused (Insulate this terminal).2.3 How to Wire a 5 Pin Relay with a Negative TriggerIn a negative trigger system (common in Japanese vehicles and modern alarms), the relay has constant 12V, and the switch provides the Ground (-).Pin 30: High current 12V (+) input from battery (Fused).Pin 86: Jumper wire from Pin 30 (or an ignition-switched 12V source).Pin 85: Connects to your switch (Switch then connects to Ground).Pin 87: Output to accessory.Pin 87A: Unused (Insulate this terminal).Note: With negative switching, you cannot easily use a standard lighted switch, as the switch lacks a direct 12V feed.Ⅲ Are all 5 Pin Relays the Same?No. While they may look identical externally, internal specifications vary significantly.The only guarantee is that they have 5 pins. Variations include:Coil Voltage: 12V is standard for cars, but 24V is used in heavy trucks, and 48V is emerging in hybrids. Plugging a 12V relay into a 24V system will instantly burn out the coil.Amperage Rating: Ranging from 20A to 80A. Using a 20A relay for a 40A fuel pump will fuse the contacts.Pin-out Configuration: While "Bosch Type" is standard, some manufacturers swap Pins 30 and 86. Always check the diagram printed on the relay case.Protection: Some relays contain internal flyback diodes or resistors to protect vehicle electronics. These are polarity-sensitive; wiring pins 85/86 backward on a diode-protected relay will cause a short circuit.Ⅳ How to Test a 5-pin Relay Using a Digital MultimeterBefore replacing components, it is vital to test the relay. A faulty relay is a common cause of electrical failure in aging vehicles. Here is the 2026 standard procedure for testing:4.1 Testing the Relay’s Coil (Pins 85 & 86)The coil should have specific resistance. Consult the manufacturer's datasheet (typically between 50Ω and 120Ω for 12V relays).Set your multimeter to the Ohms (Ω) setting (typically the 200Ω scale).Connect the probes to pins 85 and 86. Polarity does not matter for resistance testing.Result: If the meter reads within range (e.g., 75Ω), the coil is intact. If it reads "OL" (Open Loop) or infinite resistance, the coil wire is broken inside, and the relay must be replaced. If it reads 0Ω, the coil is shorted.4.2 Testing the Relay’s Terminals (Contacts)We must verify that the switching mechanism actually connects and disconnects as intended.4.3 Testing Normally Open Terminal (Pin 87)Set the multimeter to Ohms or Continuity mode.Connect probes to Pin 30 (Common) and Pin 87 (NO).Result: You should see "OL" or high resistance. This is correct because the relay is at rest (OFF). If you find continuity (near 0Ω) while the relay is on the bench, the contacts have welded together, and the relay is trash.4.4 Testing the Normally Closed Terminals (Pin 87a)Keep multimeter in Ohms/Continuity mode.Connect probes to Pin 30 and Pin 87a.Result: You should hear a beep or see near 0Ω resistance. This indicates the circuit is closed by default. If it reads "OL", the internal contact is damaged or corroded.4.5 Testing the Energized StateThis is the final verification.Use a 12V battery or bench power supply.Connect Positive to Pin 86 and Negative to Pin 85. You should hear a distinct "Click".While energized, measure resistance between Pin 30 and Pin 87.Result: It should now read 0Ω (Continuity). If it clicks but shows high resistance, the contacts are burnt (carbon buildup) and cannot carry high current.Pro Tip: Relays are generally non-serviceable. If any test fails, replace the unit. In an emergency, if Pin 87 is burnt but 87a works, you cannot swap them; you must replace the relay.Ⅴ FAQ1. What can perform the function of an SPST NC relay when actuated?An SPDT 5-pin relay can perform this function. By wiring your circuit to Pin 87a (Normally Closed), the device will turn OFF when you activate the switch, effectively acting as an NC relay.2. What is the blue wire on a 5 pin trailer plug?In trailer wiring, the blue wire in a 5-way flat connector usually controls the hydraulic lockout solenoid for surge brakes. When you put the vehicle in reverse, this wire energizes to disengage the trailer brakes, allowing you to back up without the brakes locking up. It can also power reverse lights on the trailer.3. Why does my trailer have 5 wires?A 5-wire harness connects the standard lighting (Left Turn, Right Turn, Running Lights, Ground) plus a fifth line, typically for reverse lights or disabling surge brakes. This is an upgrade over the standard 4-pin setup commonly found on boat trailers.4. What is the difference between a 4-pin and 5 pin trailer plug?The 4-pin plug handles basic legal lighting (Brake/Turn/Tail). The 5-pin plug adds a fifth wire (usually blue) specifically for reverse operations (backup lights or brake lockout). Ensure your tow vehicle is wired to support this fifth pin if your trailer requires it.5. Can a 5 pin relay be used in place of a 4 pin?Yes. A 5-pin SPDT relay fits into a 4-pin SPST socket perfectly in most Bosch-style applications. The extra pin (87a) will simply slide into the empty slot in the socket (or hang in the air) and remain unused. The relay will function exactly like a 4-pin relay.{ "@context": "https://schema.org", "@type": "FAQPage", "mainEntity": [ { "@type": "Question", "name": "What can perform the function of an SPST NC relay when actuated?", "acceptedAnswer": { "@type": "Answer", "text": "An SPDT 5-pin relay can perform this function. By wiring your circuit to Pin 87a (Normally Closed), the device will turn OFF when you activate the switch, effectively acting as an NC relay." } }, { "@type": "Question", "name": "What is the blue wire on a 5 pin trailer plug?", "acceptedAnswer": { "@type": "Answer", "text": "In trailer wiring, the blue wire in a 5-way flat connector usually controls the hydraulic lockout solenoid for surge brakes. When you put the vehicle in reverse, this wire energizes to disengage the trailer brakes, allowing you to back up without the brakes locking up. It can also power reverse lights on the trailer." } }, { "@type": "Question", "name": "Why does my trailer have 5 wires?", "acceptedAnswer": { "@type": "Answer", "text": "A 5-wire harness connects the standard lighting (Left Turn, Right Turn, Running Lights, Ground) plus a fifth line, typically for reverse lights or disabling surge brakes. This is an upgrade over the standard 4-pin setup commonly found on boat trailers." } }, { "@type": "Question", "name": "What is the difference between a 4-pin and 5 pin trailer plug?", "acceptedAnswer": { "@type": "Answer", "text": "The 4-pin plug handles basic legal lighting (Brake/Turn/Tail). The 5-pin plug adds a fifth wire (usually blue) specifically for reverse operations (backup lights or brake lockout). Ensure your tow vehicle is wired to support this fifth pin if your trailer requires it." } }, { "@type": "Question", "name": "Can a 5 pin relay be used in place of a 4 pin?", "acceptedAnswer": { "@type": "Answer", "text": "Yes. A 5-pin SPDT relay fits into a 4-pin SPST socket perfectly in most Bosch-style applications. The extra pin (87a) will simply slide into the empty slot in the socket (or hang in the air) and remain unused. The relay will function exactly like a 4-pin relay." } } ]}

CatalogIntroductionⅠ What is a Starter Relay?1.1 Definition of the Starter Relay1.2 Starter Relay Wiring DiagramⅡ What is a Starter Solenoid?2.1 Definition of the Starter Solenoid2.2 Starter Solenoid Wiring Diagram2.3 What Wires Go to the Starter SolenoidⅢ Starter Relay Vs. Starter Solenoid3.1 Is the Starter Relay the Same as starter solenoid?3.2 Starter Relay Vs. Starter Solenoid3.3 3 Differences Between Starter Solenoid Switch & Starter RelayⅣ FAQsIntroductionThe starter solenoid is sometimes referred to as the starter relay, but in many vehicles, that term refers to a separate relay that supplies power to the starter solenoid. They share some characteristics, such as the use of coil winding and electromagnetism in their operation. However, there are numerous differences between a starter solenoid switch and a starter relay.How to Test a Starter Relay on a Motorcycle, ATV, or UTV | How to Test a Starter SolenoidⅠ What is a Starter Relay?1.1 Definition of the Starter RelayA relay is a switch that is powered by electricity. It has a set of input terminals for single or multiple control signals, as well as a set of operating contact terminals. The switch may have an unlimited number of contacts in various contact forms, such as make contacts, break contacts or combinations of the two.1.2 Starter Relay Wiring DiagramStarter Relay Wiring Diagram Starter relays can vary in appearance depending on brand and vehicle type. They do, however, operate in the same manner and serve the same purpose. When you look inside these components, you will notice that they have the same parts. A starter relay is made up of housing, coil windings, a magnetic core, and an armature or plunger. When starting a vehicle, the internal construction forms an electromagnetic switch that a driver operates remotely.Ⅱ What is a Starter Solenoid?2.1 Definition of the Starter SolenoidA starter solenoid is an electromagnet that is actuated to engage an internal combustion engine's starter motor. It is typically connected directly to the starter motor that it controls. Its primary function is to act as the actuating coil of a contactor (a relay designed for high currents) that connects the battery to the starter motor itself. The starter solenoid is also used in all modern cars to engage the starter pinion with the engine's ring gear.2.2 Starter Solenoid Wiring DiagramA starter solenoid has three terminals, one small pin-type and two thicker bolt-type.The "S" terminal is a small pin-type terminal. The "S" terminal is connected to the ignition switch circuit. This is known as the starter solenoid control wire, and it connects the ignition wire to the starter solenoid. The current is routed from the ignition switch to the starter solenoid via the fuse, the neutral safety switch, the starter relay, and finally the starter solenoid.The input terminal on the starter solenoid allows positive power from the battery to enter the solenoid, and the output terminal connects to the starter motor assembly.When you turn the ignition switch key, current flows from the ignition switch to the starter fuse, then to the neutral safety or clutch pedal safety switch, then to the fusebox starter relay, and finally to the starter solenoid "S" terminal. The camshaft sensor sends information to the ECM or PCM. The ECM or PCM decides to activate the starter relay by sending a signal to it.When the starter relay is turned on, the current is sent to the solenoid pin-type "S" terminal. When the current reaches the "S" terminal, it pulls the plunger inside the solenoid, connecting the two thicker terminals, and the current begins to flow directly from the battery to the starter motor assembly.2.3 What Wires Go to the Starter SolenoidThe wiring diagram for the starter solenoid is no longer a mystery. It is extremely simple. If you're not sure which wires connect to the starter solenoid. Here is a quick example.The "S" terminal of the Pin-types is connected to the Ignition Switch.The Bolt-type Feed Terminal connects to the positive power source of the battery.The starter motor assembly is connected to the Bolt-type Output Terminal.Ⅲ Starter Relay Vs. Starter Solenoid3.1 Is the Starter Relay the Same as starter solenoid?The starter relay is frequently mixed up with the starter solenoid. This could be because both serve as relays. However, contrary to popular belief, the two names do not refer to the same vehicle component. One is just a switch, while the other is both a switch and an actuator. Here are some of the differences between these two auto parts.3.2 Starter Relay Vs. Starter SolenoidA starter relay is smaller in size than a heavy-duty starter solenoid. It consists essentially of a magnetic core surrounded by a wire. An armature or plunger at one end of the core closes contacts to operate a switch. It is spring-loaded, which aids in pushing it away from the contacts when the core loses magnetism. A starter solenoid is typically larger than a starter relay. The internal construction of the solenoid consists of two wire coils and a magnetic core at one end. With a return spring on one end, the core is free to move in and out. The other end contains the various connectors and is where the current enters the solenoid.The starter relay and starter solenoid function nearly identically. An electromagnetic field is created when a current flows through the coil winding. Magnetism moves an armature or plunger in a starter relay to close a circuit.The magnetic force created by current flowing through the coil in a starter solenoid causes the core to move out. The moving plunger accomplishes two tasks. It closes the contacts that activate the starter motor. It also shifts the pinion gear, which engages the flywheel.As we can see, a starter relay is nothing more than a switch. The starter solenoid, on the other hand, acts as an actuator by closing a circuit and moving gear. The starter relay is typically located a long distance away from the starter motor, whereas the majority of starter solenoids are attached to the motor housing.3.3 3 Differences Between Starter Solenoid Switch & Starter Relaya starter solenoid switch and a starter relay, which are vastly different in terms of construction, operation, and functionality.They share some characteristics, such as the use of coil winding and electromagnetism in their operation. However, there are numerous differences between a starter solenoid switch and a starter relay.Difference In ConstructionRelayStarter relay structureA starter relay is made up of a wire coil wound around a ferrous core and an armature attached to one end of the coil. The amateur is linked to a switch with two contacts made of the highly conducting material. A spring is located on the side. The spring regulates the armature and, as a result, the switch's closing and opening.Solenoid SwitchSolenoid Switch A starter solenoid, on the other hand, is a coil enclosing a movable plunger. Unlike the starter relay, which has an immovable coil core, the core of the starter solenoid is an iron or steel plunger that can move in and out of the coil. At one end, the steel plunger is connected to a spring. The coil, spring, and a portion of the plunger are all enclosed. The plunger's other end emerges from the casing to provide movement to an external connection. Difference In OperationRelayWhen the ignition circuit is activated, a small current flows from it, causing a much larger current to flow through the relay's coil. The electromagnetic force generated by the current in the coil magnetizes the core, causing it to pull the armature. When the armature is pulled, the contacts close, completing the intended circuit. As a result, the starter relay only serves as a switch.Solenoid SwitchAn electromagnetic force is created when current flows through the solenoid's coil winding. The force propels the movable steel core outward. This motion engages the pinion gear, which in turn engages the relevant gears on the flywheel.Difference In Function RelayThe starter relay acts as a switch. It relays the small current from the ignition circuit to cause a much larger current from the battery to operate the starter solenoid and motor. In this manner, the relay functions as a remote switch or as a link between the ignition key in the driver's seat and the starter system.Solenoid SwitchThe starter solenoid is responsible for connecting the starter motor to the flywheel. It accomplishes this by thrusting out the pinion and making contact with the flywheel, thereby starting the engine.As can be seen, a starter relay does not cause any mechanical movements. The only moving parts are the switch contacts as they close. It could be described as merely a switch in the overall ignition process.A starter solenoid generates mechanical movements that activate the starter motor and flywheel. It makes no difference. It only serves to connect the motor's moving parts and the engine flywheel.Ⅳ FAQs1. What can a Starter Relay have in various contact forms?Unlimited number of contacts.2. Can you use a starter solenoid as a relay?To operate the starting system in some automotive applications, the starter relay collaborates with the starter solenoid. In others, the ignition switch directly controls the starter solenoid circuit.3. Will a bad starter solenoid still click?You should hear a clicking sound when the starter motor solenoid engages. If you hear a clicking sound but the starter motor is not turning on, the solenoid may be engaged but not receive enough battery power. If there is no sound, the starter solenoid is most likely faulty, or you may have a dead car battery.4. What is the function of starter relay?A starter relay acts as an electrical circuit completer or circuit breaker between the vehicle's battery and the starter motor. It aids in increasing the current of the battery so that less current is required during ignition.5. Can a relay click and still be bad?If you hear or feel the relay click, the problem isn't with the relay or its wiring. If it doesn't click, the problem could be with the relay or the wiring. Unless the relay contains a diode, switching the polarity has no effect; the electromagnet will be energized regardless.6. How do I know if my starter fuse is blown?Your starter motor is on all the time. An illuminated ABS Light is one of the first signs of a blown fuse or relay. When you turn your car, a faulty relay frequently produces an audible clicking sound. A car that suddenly stalls while driving is one of the most common symptoms of a failed ignition relay.7. How to Bypass the Starter Solenoid？If you try to start your vehicle and all you hear is a clicking sound, the problem could be with the starter motor or solenoid. The clicking noise is caused by the starter solenoid attempting to force the starter gear to engage the engine. However, the solenoid may be too weak to force the gear into engagement, or the bearings within the starter motor may be frozen. You can bypass the starter solenoid to determine which component is faulty.8. How to tell if starter relay is bad？The vehicle is deadStarter making clicking soundsOccasional failures in starting the vehicleStarter does not get Switched off.

CatalogIntroductionⅠ How to Wire a Relay?Ⅱ Why Use a Relay?Ⅲ Relay Wiring DiagramⅣ 4 Pin Relay Wiring Diagram vs 5 Pin Relay Wiring Diagram4.1 The Main Difference between 4 or 5 Pin Relays4.2 4 Pin Relay Wiring Diagram4.3 Sample Wiring Diagrams for a 4 Pin Normally Open Relay4.4 Why to Use a 4 Pin Relay for Driving Lights4.5 5 Pin Relay Wiring Diagram4.6 How To Use 5 Pin Relay4.7 5 Pin Relay Wiring Diagram for lightsⅤ FAQIntroductionIn layman's terms, a relay is an electromagnetic switch that is typically used to switch the power supply either automatically or manually. In this post, I'll go over the fundamentals of 4 and 5 pin relay wiring diagrams. The relay comes in a variety of shapes and sizes. It can be based on the pins or contacts, ampers, or voltage ratting (AC or DC). These contacts are pins 4, 5, 8, 11, 14, and so on. However, we have two coil pins on each pin. Where we supply the necessary ratting current. As an example, suppose we have a 12-volt DCV relay. As a result, we will supply 12 volts of DC (Direct current) to the relay coil. And if we have the 220 ACV, we can supply the relay coil with 220 volts AC (alternating current).The remaining pins and contacts are known as main contacts or switching contacts. The relay switching pins include the following: common, NC (normally open), and NO (normally close).Ⅰ How to Wire a Relay?How To Wire A Relay - Quick TipStill confused? See the full video here. Ⅱ Why Use a Relay?There are several reasons why you might need or want to use a relay:Using a lower current circuit to replace a high current circuit.This is the most common reason, and it is useful when an in-line switch or existing circuit cannot handle the required current. For example, if you wanted to install some high-powered work lights that activate with the headlights, there's a chance they'd exceed the capacity of the existing loom.Cost SavingBecause high current capacity wiring and switches are more expensive than lower current capacity versions, using relays reduces the need for more expensive components.Activating more than one circuit from a Single InputA single input signal from one part of an electrical system (e.g., central locking output, manual switch, etc.) can be used to activate one or more relays, which then complete one or more other circuits, allowing you to carry out multiple functions from a single input signal.Carrying Out Logic FunctionsWhen linked together, electromagnetic relays can be used to perform logical operations based on specific inputs (for example, latching a +12V output on and off from a momentary input, flashing alternative left and right lights, and so on). Although electronic modules have largely replaced these logical functions in OEM designs, it can still be useful, fun, and often more cost-effective to use relays to perform them in some after-market projects (particularly where you have a bespoke application).Ⅲ Relay Wiring DiagramA simple wiring diagram of a relay is shown here to help you understand how it works in a circuit.Relay wiring diagramLet's talk about this relay wiring diagram now.It is the relay that is powered by the DC supply. Pin 1 is the magnetic coil's positive pin. Pin 2 is the coil's negative pin. As a result, we used an SPST switch to connect a DC power source across terminals 1 and 2. We can use this switch to turn on or off the power supply to the relay coil whenever we want.Terminal 3 is shared by NO and NC contacts. Terminal 5 is designated as NO, while Terminal 4 is designated as NC. This means that under normal circumstances, terminal 3 is connected to terminal 4. When we apply power to the coil, terminal 3 is connected to terminal 5.As you can see, we connected two LEDs here. The NO terminal is connected to the red LED, and the NC terminal is connected to the green LED. So, under normal circumstances, the green LED will glow, but when we apply power to the relay by turning on the switch, the red LED will glow.Ⅳ 4 Pin Relay Wiring Diagram vs 5 Pin Relay Wiring Diagram4.1 The Main Difference between 4 or 5 Pin RelaysA 4 pin relay controls a single circuit, whereas a 5 pin relay switches power between two circuits.4 Pin Relay2 pins (85 & 86) control the coil and 2 pins (30 & 87) switch power on a single circuit in a 4 pin relay. Four-pin relays are available in two configurations: normally open and normally closed. When the coil is activated, a normally open relay turns on the power to a circuit. When the coil is activated, a normally closed relay turns off the power to the circuit.5 Pin Relay5 pin relays have two pins (85 & 86) for controlling the coil and three pins (30, 87 & 87A) for switching power between two circuits. They have connection pins that are both normally open and normally closed. Power is switched from the normally closed pin to the normally open pin when the coil is activated.4.2 4 Pin Relay Wiring Diagram The diagram of a four-pin relay is depicted in the image below. This circuit diagram will be used later to wire a relay for driving lights.4 Pin Relay Wiring DiagramYou'll need to use a fuse to connect the relay's Pin 30 to the 12V battery for driving lights. We're not directly connecting pin 30 to the battery here; instead, we're using a fuse. This is because the fuse protects us from overcurrents.If there is a fault in the driving light circuit, the fuse protects the burning of lights and other circuits from current overshoots.Pin 85 of the relay is grounded, while Pins 87 and 86 are switching pins. You can turn on the main beams of the driving light using this 4 pin relay by switching the battery connections to either circuit connected with pin 86 or 87 of the relay.4.3 Sample Wiring Diagrams for a 4 Pin Normally Open Relay Sample Wiring Diagrams for a Normally Open RelayExample 1. 4 pin (normally open) relay with the switch on the control circuit's positive side.  Example 2. 4 pin (normally open) relay with the switch on the control circuit's negative side.   Note: These circuits have been simplified to demonstrate the function of a relay and thus do not include the fuse protection that would be required. Relay coil terminals have no polarity unless the relay coil is protected by a diode (inside the relay), in which case the coil terminal wired to the diode's anode must be connected to negative.4.4 Why to Use a 4 Pin Relay for Driving LightsThe main reason for installing this relay system is to keep dangerous voltages outside of your cabin or driving area.The high voltage required by your headlight, which is supplied by the battery, is kept inside the engine compartment by a relay.Simply put, a relay is a switch that is controlled by another switch. The switch installed in the vehicle's sitting cabin, on the front side of the driver, operates on very low voltage. As you can see, this voltage is not high enough to harm the driver or other electronic components. This switch provides power to the relay, which is essentially an electromagnet. It will also control the high current circuit that is directly connected to the headlights.This is how a low current circuit controls a high current circuit, keeping both the driver and the car electronics safe, and why we need a relay in our headlights!4.5 5 Pin Relay Wiring Diagram A pin relay is SPDT relay, which means that the contacts of relay single pole double throw. In single pole double throw relay, we have one pin is common, 2nd are normally close and 3rd are normally open. Two pins for the coil. This relay can be used for different types of controlling or switching. Such as for lights, fan, fuel pump, etc. Here I showed the 5 pin relay wiring diagram. 5 pin relay wiring diagramIn the diagram above, I've depicted a single pole double throw relay (5 pin relay). Not that his relay can be 5 volts DCV, 12 volts DCV, 24 volts DCV, and so on, depending on the coil's ratting voltage. In the above 5 pin relay diagram, pins 1 and 2 are for the coil, pin 3 is the common pin, pin 4 is normally closed, and pin 5 is normally open.4.6 How to Use 5 Pin RelayA relay can be used for a variety of switching purposes. If you want to control electrical devices automatically, a relay is the best option. When we talk about relays, as I previously stated, there are various types of relays for various applications. This post, however, is about the 5 pin relay. As illustrated by the 5 pin relay diagram. This has three main pins. As opposed to a single pole double throw.So when we say single pole double throw, we mean that it has a common point as well as two other points (NC and NO).To switch something from a single pole double throw relay, you must use the common and other points. For example, if you require that the light bulb be turned off when the relay operates. Then you must use a common, normally closed pin. If you want to turn on the light bulb, you must use the common and normally open pins. I've shown how to wire a 5 pin relay for lights in this article.4.7 5 Pin Relay Wiring Diagram for lightsIn the 5 pin relay wiring diagram below, I show how to turn on lights when the relay is activated and how to turn them off when the relay is deactivated.Similarly, if you want to control or wire a fan with a relay, you can use the same method. It is important to note that the ratted voltage must be applied to the relay coil. If your relay is powered by 12 volts DCV. Then you must supply the 12-volt DCV.Ⅴ FAQ1. What costs more than lower current capacity versions?High current capacity wiring and switches.2. What can you use to activate one or more relays?A single input from one part of an electrical system.3. How can you use a single input from one part of an electrical system?To activate one or more relays that then complete one or more other circuits and so carry out multiple functions from one input signal.4. What will switch power on for a circuit when the coil is activated?A normally open relay.5. What is the main purpose of installing a 4 Pin Relay for Driving Lights?To keep dangerous voltages outside of your cabin or driving place.