Battery Equivalents, Replacements and Cross Reference Charts

Best Solar Panel Kits - 100 Watts, 200 Watts, 400 Watts Kits

Solar panel kits are great solution for powering hungry electric and electronic devices in various off-the-grid situations like camping, taking fishing trips, or simply when having issues with mains power.

Solar panel kits consists of one or more solar panels, power/charge controller and one or more deep cycle batteries for storing electric energy and are usually combination of solar panel/power (charge) controller/battery or solar panel/power station.

Group 94R Batteries - Dimensions, Features and Recommendations

BCI Group 94R batteries are very popular automotive and light industrial batteries, commonly used on the passenger and light commercial vehicles. BCI Group 94R batteries are also known as H7, L4 and/or LN4 batteries.

They are often installed on vehicles manufactured by BMW, Mercedes, Audi, Volkswagen etc. As such, BCI Group 94R batteries are designed to be maintenance free batteries, to be able to provide strong starting current even in low temperature conditions, to accept charge quickly, to power broad range of onboard electronics, to endure automatic start-stop applications etc.

Renogy 12V 100Ah Deep Cycle AGM, Gel and Lithium Batteries

Renogy manufactures several 12V 100Ah deep cycle batteries differing in chemistry, dimensions, electrical characteristics, warranty, price and other important features.

Renogy 12V 100Ah deep cycle batteries may be found as Absorbent Glass Mat (AGM) batteries, Gel cell batteries (two different models) and as lithium iron phosphate batteries (also two different models). Each battery type has its pros and cons, and knowing them is important for choosing the right battery for the right task.

Best 21700 Battery

Lithium ion 21700 batteries are very popular 3.6-3.7 volts batteries for high drain devices that also require long lasting batteries in terms of constant voltage, battery capacity, low self-discharge rate, and large number of charging and discharging cycles.

21700 lithium rechargeable batteries come in many versions differing in the their chemistry, battery capacity, maximum pulse and continuous drain current, maximum charging current, protective electronics, battery terminals etc.

Weize 12V 100Ah Deep Cycle AGM and Gel Batteries

Weize 12V 100Ah Deep Cycle AGM and Gel batteries are two very similar models of non-spillable, sealed lead acid (SLA) batteries, differing in electrolyte, size, terminals and few more details.

Although these two batteries are intended for general use and can be even used interchangeably, it is important to know their differences and avoid confusion and potential power issues.

Optima Batteries 8020-164 35 RedTop Starting Battery

Optima 35 RedTop is very popular and lightweight AGM starting battery featuring rather specific 'spiral-wound' cells technology, ensuring high vibration resistance, spill proof design, faster recharging, high CCA and MCA etc.

Optima 35 RedTop is used in cars, RVs, trucks, boats etc as strong and reliable starting battery. Despite having excellent RC value for the battery of this capacity, it should not be used in deep cycle applications.

D Cell Battery - Replacements and Equivalents

D cell battery is cylindrical battery introduced in 1898 and used in variety of high-drain applications including flashlights, toys, radio receivers and transmitters, medical devices, security systems etc.

Most common label for this battery is 'D-cell', but others labels are used as well, like 'flashlight battery', MN1300, MX1300, LR20, R20, 13A, 13D, Type 373, BA-30 etc.

Universal Power Group UB121000 AGM Deep Cycle Battery

Universal Power Group (UPG) UB121000 AGM battery is large and heavy battery intended for standby and cyclic use in off-the-grid, marine, security, solar, wind, medical and similar applications.

UPG UB121000 belongs to BCI Group 27 and is Absorbent Glass Mat (AGM) Valve Regulated Lead Acid (VRLA) battery of spill proof design that can be mounted in any position, with increased resistance to mechanical shocks and vibrations.

Group 35 Batteries - Dimensions, Features and Recommendations

BCI Group 35 batteries are very popular battery size of lead-acid batteries, commonly used in cars, trucks, RVs and other similar applications as starting or dual-purpose batteries.

These batteries, especially dual purpose and deep cycle batteries, are often used in other applications as well, like UPS batteries, wheelchair batteries, security system backup batteries, medial applications, off-the-grid etc.

Most popular BCI Group 35 batteries are Absorbent Glass Mat (AGM) Sealed Lead Acid (SLA) batteries, but the lithium iron phosphate (LiFePO₄) batteries are slowly entering the market, at least for deep cycle applications.

SR516, SR516SW, SR62, LR516, LR62, 317 Battery Equivalents and Replacements

SR516, SR516SW, SR62, LR516, LR62, 317 button cell batteries are often used in wrist watches, toys, remotes, and similar low drain devices.

These batteries are manufactured by almost all most reputable battery brands and are easy to find at online shops and local hardware stores.

C Cell Batteries vs 26500 Batteries - Comparisons and Recommendations

C cell batteries and 26500 batteries are physically very similar batteries - they are cylindrical batteries commonly used at home appliances, toys, flashlights, musical instruments etc.

C cell batteries and 26500 batteries differ in chemistry type and thus their nominal voltage, capacity, internal resistance (drain type), shelf life, use and similar.

Group 8D Batteries - Dimensions, Features and Recommendations

BCI Group 8D batteries are large and heavy commercial batteries, often used for off-the-grid applications, as solar batteries, as RV house batteries, for security, medical and standby applications, for powering various industrial vehicles and applications etc.

BCI Group 8D lead-acid batteries are commonly Absorbent Glass Mat (AGM) or Gel-Cell Sealed Lead Acid (SLA) batteries, with lithium iron phosphate (LiFePO₄) 8D batteries being relatively rare.

Group 65 Batteries - Dimensions, Features and Recommendations

BCI Group 65 batteries are commonly used as automotive, marine and industrial batteries. They are mid-size batteries, often designed as dual purpose AGM batteries suitable as both starting and deep cycle batteries, thanks to the advances in AGM SLA battery technology.

Generally, group 65 batteries feature 70-75 Ah 20h capacity, 130-150 minutes RC, 750-950 CCA with the MCA values of some models reaching almost 1100 Amps. Also, they usually weigh between 45 and 55 pounds (20 - 25 kg).

Lithium-ion BCI Group 65 batteries are not as common as AGM batteries, but they are slowly appearing on the market, offering many advantages over AGM batteries, but also having certain limitations.

4SR44, 4LR44, PX28A, A544, 28A, K28A Battery Equivalents and Replacements

4SR44 or 4LR44 battery is a small cylindrical battery often used in dog collars, film cameras, small LED flashlights, car security systems, remote controls, toys and similar.

Common labels for this battery are 4SR44 or 4LR44, depending on the exact chemistry, but there are many other labels that may confuse the user, including PX28A, A544, 28A, K28A, K28L, V34PX, 476A, 4A76, 2CR1/3N, 2CR11108, etc.

Best Sump Pump Backup Battery

Battery powered sump pumps are type of emergency equipment that must operate reliably when required, and saving the money on these pumps or their batteries may be very expensive thing to do.

Sump pump backup battery must be strong enough to power sump pump motor and it must store enough energy to power the whole unit long enough to prevent as much damage as possible until mains power is restored.

SR48, AG5/SG5, LR754, SR754, Orange Tab/13, 193/309/393 Battery Equivalents and Replacements

SR48, AG5/SG5, LR754, SR754, Orange Tab/13, 193/309/393 etc. are small, button coin cell batteries often used in watches, toys, small LED flashlights, wearable electronics, remote controls and similar.

SR48, AG5/SG5, LR754, SR754, Orange Tab/13, 193/309/393 batteries are available in several chemistries and are often labeled differently by their manufacturers, leading to some confusion by their users.

How Many Amps is a Car Battery - Car Battery Amps?

Knowing your car's battery amps and other features is very important not only when replacing the battery, but also when the battery is being used not only for cranking purposes, but also for powering other electric and electronic systems like lights, navigation, multimedia devices, security systems, etc.

With more and more onboard systems, car manufacturers are slowly replacing pure starting batteries with the new dual purpose AGM batteries, featuring many improvements over older flooded ones.

Group 24 Batteries - Dimensions, Features and Recommendations

BCI Group 24 batteries are mostly general purpose batteries commonly found in large UPS systems, medical and security systems, wheelchairs, in vehicles, industrial applications etc. They are rarely used as starting/cranking batteries - more commonly they are used in deep cycle of standby/float applications.

These mid-size batteries feature several subgroups, differing slightly in their dimensions - one must be careful which battery is required, since even the slightest size differences may cause the battery not to fit its compartment.

Mighty Max ML75-12 12V 75Ah AGM Battery

Mighty Max ML75-12 battery is Absorbent Glass Mat (AGM) Sealed Lead-Acid (SLA) deep cycle, maintenance free battery. It features spill-proof design and is intended for wide range of applications including standby and security systems, as wheel chair or trolling motor battery, emergency sump pump battery, electric vehicles battery etc.

Although designed as deep cycle battery, Mighty Max ML75-12 also features relatively high discharge rate, long service life, wide operating temperature, and low self-discharge rate. However, when used in standby applications, smart battery charger/maintainer is highly recommended for keeping the battery fully charged and ready for an emergency.

AAA Batteries - Size, Chemistry Types and Replacements

AAA batteries are one of the most common cylindrical battery sizes used in various electronic and electric devices, like remote controls, toys, cameras, flashlights, radios etc.

AAA batteries differ greatly in chemistry and hence they differ in capacity, voltage, current/voltage discharging characteristics and many other features, which may be of great importance when powering sensitive electronic equipment.

Group 34 Batteries - Dimensions, Features and Recommendations

Group 34 batteries are medium large, but still rather powerful batteries, featuring 20h capacity in the 50-75 Ah range, providing 750-900 CCA, 100-145 minutes of Reserve Capacity etc. Their weight depends on the chemistry, battery type and internal construction and it ranges between 37 and 51 pounds (16.8 - 23.1 kg).

BCI group 34 batteries are commonly used in automotive, marine, industrial and off-the-grid applications in the form of starting, dual purpose and deep cycle batteries, offering good starting/cranking characteristics, large number of charging/discharging cycles, and excellent deep cycle recovery - battery type dependent, of course.

Lithium CR2016, BR2016, LiR2016, DL2016, ECR2016, E-CR2016, SB-T11, 5000LC Battery Equivalents and Replacements

Lithium CR2016, BR2016, LiR2016, DL2016, ECR2016, E-CR2016, SB-T11, 5000LC etc battery is lithium 3.0 volts non-rechargeable button/coin cell.

It is very popular, low-profile battery commonly used in digital watches, credit-card size devices, remote controls, calculators etc. Since practically all most reputable battery brands manufacture these batteries, getting a new one shouldn't be a problem. However, it is good to know few additional things about these batteries ...

Odyssey Group 34 AGM Batteries - Models 34-PC1500, 34R-PC1500, 34M-1500 and 34/78-PC1500

Odyssey Group 34 batteries are Odyssey 34-PC1500, Odyssey 34R-PC1500, Odyssey 34M-1500 and Odyssey 34/78-PC1500 batteries, featuring similar electrical features, with differences mostly being in the terminals arrangements.

Odyssey Group 34 batteries are true dual purpose battery, suitable for use in the automotive and marine applications, of-the-grid, medical and security systems and other situations where durable and reliable source of power is required. As usual, Odyssey Group 34 batteries are not the cheapest group 34 batteries on the market ...

LR43, SR43, LR1142, SR1142, AG12, 386, 301 Battery Equivalents and Replacements

LR43, SR43, LR1142, SR1142, AG12, 386, 301 batteries are button/coin cell batteries often found in calculators, watches, toys, small flashlights, remote controls and other small electronic devices.

According to the IEC standard, these batteries should be labeled LR1142 (alkaline) or SR1142 (silver-oxide). In many instances shorter, two-digit code is used: LR43 for alkaline and SR43 for silver-oxide batteries, but there are other labels as well, like AG12, SG12, 386, 301 etc.

VMAXTANKS XTR34-75 12V 75Ah Deep Cycle AGM Battery

VMAXTANKS XTR34-75 is BCI group 34, deep cycle AGM battery, suitable for use as automotive, marine, wheelchair battery, or it can be used in various, both standby and cycling applications.

Although labeled as deep cycle battery, this versatile battery is true dual purpose battery, being able to provide large currents, but also tolerates frequent deep discharges. However, as the depth of discharges is increased, so does its number of cycles decreases - similarly to all other AGM batteries. Nonetheless, it is tough and durable battery, thus it is not the cheapest 75 Ah 12V AGM battery on the market...

Lithium CR2477 Battery - Equivalents and Replacements

Lithium CR2477 is non-rechargeable 3.0 volts manganese-dioxide lithium battery, labeled as 'CR2477', but also as DL2477, ECR2477, KCR2477, EB-CR2477, BR2477, LiR2477 etc.

CR2477 battery is used as watch battery, in remote controls, in toys, in medical equipment etc.

Lithium non-rechargeable 3.0 V CR2477 battery is known as the battery with the highest capacity of all lithium button/coin cell batteries.

Lithium CR2450 Battery - Brands, Equivalents and Replacements

Lithium 3.0V CR2450 battery is non-rechargeable button/coin cell battery commonly used in watches, computer motherboards, medical devices, LED flashlights, toys, remote controls, car remote keys, security systems, wearable electronics etc.

When compared with smaller 3.0V lithium batteries, CR2450 is large and powerful battery with large capacity and is often used in 'high' drain devices.

Mighty Max ML55-12 12V 55Ah AGM Deep Cycle Battery

Mighty Max ML55-12 AGM battery is 12V 55Ah general purpose, deep cycle AGM (Absorbent Glass Mat) SLA (Sealed Lead Acid) battery. It features high vibration resistance and spill proof design, allowing it to be used virtually in any position.

Mighty Max ML55-12 AGM battery is commonly used as mid-size trolling motor battery, fish finder battery, for off-the-grid applications, backup and security systems, etc.

CR-V3, CRV3, ELCRV3, RLCRV3 Battery Equivalents and Replacements

CR-V3, CRV3, ELCRV3, RLCRV3 is very popular, high-capacity single-cell lithium or lithium-ion battery, often used in high-drain devices and appliances, like flashlights, photo cameras, toys and similar.

CR-V3 is flat, rectangular battery 52.2 mm in height, 28.05 mm in width and 14.15 mm in depth and is physically very similar to two AA (R6) batteries side-by-side.

CR2 Battery Equivalents and Replacements - CR2 Battery vs 15270 Battery

CR2 batteries are very popular cylindrical non-rechargeable 3.0V lithium batteries, commonly used in various devices like photo cameras, golf rangefinders, weapon mounted lights, tactical and EDC flashlights, security devices etc.

15270 (15266) batteries are rechargeable lithium batteries with nominal voltages between 3.0 and 3.7 volts, depending on the exact chemistry types and built in Battery Management System (BMS). Since they are very similar in dimensions with CR2 batteries, they are often labeled as 'rechargeable CR2' batteries.

SR416, SR416SW, SR416S, 337, LR416 Battery Equivalents and Replacements

SR416SW is very small button cell battery, commonly used in wrist watches, but also in calculators, credit card size devices, as CMOS battery etc.

Common labels of these batteries include SR416, SR416SW, SR416S, 337, LR416 and few more, but most reputable brands commonly use 'SR416SW', often combined with '337' label.

VMAXTANKS 4D AGM Batteries Comparison - VMAXTANKS XTR4D-200 vs. VMAXTANKS MB197-200 vs. VMAXTANKS MR197-200

VMAXTANKS XTR4D-200, VMAXTANKS MB197-200 and VMAXTANKS MR197-200 are a group of 12V 200Ah, AGM SLA, Group 4D batteries. These are large, sturdy and heavy batteries, being able to store plenty of energy, ready to be delivered when required at the moment notice.

Although these batteries are very similar in size, weight and performance, they also differ in certain details that may be important for future user...

Best CR123A Battery - Rechargeable vs Non-Rechargeable Lithium CR123A Batteries

CR123A batteries are very popular cylindrical lithium batteries, commonly used in various devices like photo cameras, flashlights, security devices, military equipment, etc.

CR123A batteries come in two major versions: rechargeable and non-rechargeable CR123A batteries, both featuring different voltages, drain currents, capacities etc. That and the fact that many manufacturers come with their 'own' labels lead to slight confusion when picking the right CR123A battery.

Group 27 Batteries - Dimensions, Features and Recommendations

Group 27 batteries are rather large and powerful batteries, featuring 20h capacity in 66-110 Ah range, providing 600-1000 CCA, 140-220 minutes RC etc. Their weight depends on the internal construction and it ranges between 54 and 70 pounds (24.5 - 32 kg).

Group 27 batteries physical dimensions depends on the exact battery group because there are three different, although very similar battery groups: Group 27, Group 27F and Group 27H, although they are often labeled as Group 27 Batteries.

NorthStar AGM BCI Group 27 Batteries - NSB-AGM27, NSB-AGM27F and NSB-AGM27M Batteries

NorthStar NSB-AGM27, NSB-AGM27F and NSB-AGM27M are versatile, dual purpose, BCI Group 27 batteries, designed to be durable and reliable power source for even the most demanding applications.

NortStar NSB-AGM27, NSB-AGM27F and NSB-AGM27M batteries are essentially the same battery, differing only in their terminal posts - depending on their intended use.

Lithium CR1616, DL1616, BR1616, ECR1616, 280-209, GPCR1616, LiR1616, KCR1616, 5021LC 3V Battery Equivalents and Replacements

Lithium CR1616 is very popular 3.0 volts lithium primary (non-rechargeable) battery, often used in car remote keys, wrist watches, TV remotes, medical equipment, calculators, digital scales and other small electronic devices.

Due to its very long shelf life and stable voltage, CR1616 is often used as memory battery in computers, cameras, game controllers and other electronic devices.

VMAXTANKS MR-107, MB-107 and SLR-85 AGM Deep Cycle Batteries

VMAXTANKS MR-107, MB-107 and SLR-85 are BCI Size 24, AGM SLA deep cycle batteries.

These batteries feature nominal capacity of 85 Ah and nominal voltage of 12 volts. Physically they are very similar, but nonetheless, they also differ in several very important details depending on their intended purpose.

VMAXTANKS MR127-100 AGM Deep Cycle Battery

VMAXTANKS MR127-100 battery is AGM SLA, 12V 100 Ah, deep cycle, high performance battery, often used for marine, automotive and other off-the-grid applications.

VMAXTANKS MR127-100 battery is BCI Group 27 battery, featuring robust, spill-proof design, heavy duty lead tin plates, long shelf life, low self-discharge rate etc.

CR11108, CR1/3N, CR-1/3N, DL1/3N, 2L76, 2LR44 3V Lithium Non-Rechargeable Battery Equivalents and Replacements

CR11108, CR1/3N, CR-1/3N, DL1/3N, 2L76, 2LR44, 2KL1/3N, 5008L, VL1/3N etc. are non-rechargeable 3V lithium batteries, most commonly based on the Lithium Manganese Dioxide chemistry.

Commonly, they are know as CR11108 or CR1/3N batteries and are often used in cameras, calculators, dog collars, gun sights, PDAs, computer motherboards etc.

DieHard 38232 Advanced Gold AGM Group 34 Battery

DieHard 38232 Advanced Gold AGM Group 34 Battery is designed as starting battery for cars, trucks, RVs and similar vehicles.

DieHard 38232 is maintenance-free, spill-proof, AGM battery, with improved resistance to vibrations and increased cycle life.

Optima Batteries D27M BlueTop and D27F YellowTop Starting and Deep Cycle Batteries

Optima Batteries D27M BlueTop and D27F YellowTop Starting and Deep Cycle Batteries are versatile, dual purpose marine and automotive batteries. Optima Batteries D27M BlueTop and D27F YellowTop are AGM (Absorbent Glass Mat) SLA (Sealed Lead Acid) batteries, with the spiral wound lead plates, offering good vibration resistance, extended life, low maintenance and faster recharging.

Optima Batteries D27M BlueTop and D27F YellowTop are completely spill proof 12V AGM batteries, mountable in virtually any position.

CR2020/BR2020/VL2020 Battery Replacements and Equivalents

CR2020/BR2020/VL2020 are lithium coin-cell batteries with nominal 3.0 voltage. They come in several versions: CR2020 is manganese-dioxide lithium non-rechargeable battery, BR2020 is Carbon-monofluoride lithium non-rechargeable battery and VL2020 is lithium rechargeable battery.

Depending on the exact chemistry, CR2020/BR2020/VL2020 are used in various applications requiring different battery features and characteristics.

CR2412/BR2412 3V Lithium Non-Rechargeable Batteries Equivalents and Replacements

CR2412/BR2412 are not the most common button/cell type 3V lithium non-rechargeable batteries on the market, but due to their dimensions they are often used in small card-like devices, watches, car keys, memory backup, various medical meters and similar.

And as such, when the original battery needs replacement, it is very important to find the proper one.

26650 Battery - Dimensions, Chargers, and Flashlights

Lithium ion 26650 batteries are common choice for high drain devices that also require large capacity batteries, low self-discharge rate and large number number of charging and discharging cycles. Lithium ion 26650 rechargeable batteries are very similar to 18650 batteries, but they have ~2x larger volume and hence larger capacity/larger drain currents.

Most important features of 26650 rechargeable batteries are their native capacity, maximum pulse current, continuous drain current, maximum allowed charging current, protective electronics available, exact chemistry and similar.

Non-Rechargeable vs. Rechargeable Hearing Aid Batteries: Size 10, 312, 13, 675 Hearing Aid Batteries

Non-Rechargeable (disposable) zinc-air batteries have been standard hearing aid batteries for a long time. They have replaced older mercury-oxide batteries and after introducing mercury-free zinc-air batteries, they have become de facto standard for hearing aid batteries.

However, rechargeable batteries are being used more and more in everyday electronics and as such, they are slowly entering the hearing aid market as well. But, there are several very important issues that rechargeable batteries face when being used as hearing aid batteries...

SR57, LR57, 395, 399, SR927W, SR927SW, SR927PW, SR927, SR926, LR927, LR926, SG7, AG7 Battery Equivalents and Replacements

SR57, LR57, 395, 399, SR927SW, AG7 etc. batteries are very popular button/coin cell non-rechargeable batteries, available in alkaline and silver-oxide chemistries and manufactured by practically all battery brands.

These batteries are commonly found in small electronic and electric devices requiring reliable power source like keychain flashlights, wrist watches, small remote controls and similar.

AA Batteries - Size, Types and Equivalents

AA batteries are one of the most common battery sizes used in household electronic devices.

AA batteries differ in used chemistry and hence the capacity, voltage, discharging characteristics and other features very important when powering sensitive electronic equipment.

Group 31 Batteries - Dimensions, Features and Recommendations

Group 31 batteries are relatively large and powerful batteries, featuring 20h capacity in 75-125 Ah range, providing 750-1250 CCA, 150-250 minutes RC etc. Their physical dimensions are approximately 13 x 6 13/16 x 9 7/16 inches (~13 x 6.8 x 9.44 inches, 330 x 173 x 240 mm), while their features depend on the battery design, intended use, chemistry and similar. Group 31 batteries are very common in marine, automotive, off-the-grid and similar applications, making them one of the most popular battery groups.

370, 371, LR69, LR920, LR921, SR69, SR920SW Battery Equivalents and Replacements

LR920 and SR920SW are popular alkaline and silver-oxide batteries commonly found in wrist and other watches, remote controls, some toys, small flashlights and similar.

These batteries are usually labeled as SR69, SR920W, SR920SW, SR920PW, SR920, SR921, SR69, 171, 370, 371, LR69, LR920, LR921, SG6, AG6 etc. leading to the confusion when proper battery equivalent and replacement battery is needed.

Fortunately, most popular battery brands use SR920SW, 371, 370, LR920 or AG6 when labeling their LR920/SR920SW batteries.

364, AG1, LR621, SR621SW Battery Equivalents and Replacements

LR621 and SR621SW are very popular coin/button cell batteries often used in wrist watches, small toys, remote keys, and similar small and compact devices.

LR/SR621 batteries are manufactured by many leading brands, and can be easily found at online shops and stores.

Optima RedTop 34, 34R, 34/78, Optima YellowTop D34, D34/78 and Optima BlueTop 34M, D34M Batteries Comparison

Optima batteries are very popular automotive and marine battery brand. BCI Group 34 batteries are commonly used as starting, dual purpose and as deep cycle batteries in cars and other vehicles, in boats, off-the-grid applications etc. Optima group 34 batteries come in several, often very similar versions, but optimized for certain applications. Choosing the right one can be daunting task, but it shouldn't. Read more ...

Battle Born 100 Ah LiFePO4 12 Volt Deep Cycle Battery

Battle Born 100 Ah LiFePO4 12 Volt Deep Cycle Battery is lightweight and durable drop-in replacement for similar lead acid (SLA AGM or Gel Cell, or even flooded cells) batteries. It features protective electronics that monitors battery parameters, like charging and discharging currents, voltages, temperatures and similar.

Battle Born 100 Ah LiFePO4 12 Volt Deep Cycle Battery can be directly connected in series and parallel to create battery packs with larger capacities and voltages. It can be directly charged using lead-acid chargers, just one has to be cautious regarding charging currents and voltages.

Wrist Watch Battery Replacement Chart

Wrist watches are commonly powered using one or rarely two button/coin cell batteries, and these batteries have limited operating lifetime. When replacing old battery with the new one, the best practice is to use batteries recommended by watch manufacturer.

However, finding exact type and model can be sometimes confusing due to different labels some battery brands are using for their batteries. Also, using silver-oxide instead of alkaline batteries can prolong the watch operating time on a single battery.

LR521, LR63, SR521, SR521S, SR521SW, SR63, 379, SG0, AG0 Battery Equivalents and Replacements

LR521, SR521, 379, AG0 button cell batteries are often used in wrist watches, toys, remotes, and similar low drain devices. These batteries are manufactured by most, if not all, most reputable battery brands and are easy to find, if you know what to look for.

Optima 8052-161 D31M BlueTop Dual Purpose Marine Battery

Optima 8052-161 D31M BlueTop Dual Purpose Marine Battery is very popular starting and deep cycle battery for marine and automotive applications. It is maintenance free and spill-proof SLA battery that can operate in virtually any position, featuring very good both starting and deep cycle performances. It is commonly used in single battery electrical systems found at RVs, boats, yachts, and even cars.

Odyssey 31M-PC2150 AGM Marine Dual Purpose Battery Review and Recommendation

Odyssey 31M-PC2150 is BCI group 31 battery, designed as dual purpose battery. As starting battery it can easily provide 1000+ CCAs and as deep cycle battery it comes with 205 min RC rating.

Odyssey 31M-PC2150 is AGM SLA battery, featuring increased resistance to vibrations, spill-proof design, two types of terminals, can operate in any position etc.

It is one of the heaviest group 31 batteries on the market and far from being cheap, but it is one of the best batteries in its class (if not the best) and worth every (euro)cent.

Pick the Best 1000 CCA (Cold Cranking Amps) Marine Battery

Marine batteries are designed to operate in tough conditions due to vibrations and other mechanical stress, they must be able to power various electric and electronic devices and when the main engine must be started, they must be able to provide large currents in order to start large, often multiple gasoline or even diesel engines even when not fully charged. Such requirements significantly reduce the number of potential 1000 CCA marine battery models.

CCA (Cold Cranking Amps), CA (Cranking Amps) or MCA (Marine Cranking Amps) and HCA (Hot Cranking Amps) define the maximum current that a battery is able to provide under certain conditions.

Lithium CR2025, DL2025, E-CR2025, SB-T14, 5003LC, BR2025, LiR2025 Battery Equivalents

Lithium CR2025 is very popular lithium 3.0 V non-rechargeable battery, often used in car remote keys, watches, medical equipment, calculators, remote control devices, keychain LED lights and other small electronic devices. Due to its very long shelf life and stable voltage, CR2025 is often used as memory battery in computers, cameras and other electronic devices.

Thanks to its high demand, many manufacturers offer these batteries with various labels,  creating slight confusion regarding CR2025 battery equivalents and replacements. Often CR2025 batteries are labeled as CR2025, DL2025, E-CR2025, SB-T14, 5003LC, BR2025, LiR2025 etc.

9-volt, E battery, PP3, 6LR61, 6F22, 1604A, 1604D, MN1604 Battery Equivalents and Replacements

9-volt, E or PP3 battery is very popular 9V rectangular battery often used in portable radios, cameras, walkies-talkies, smoke alarms, alarm clocks and other applications that require slightly larger voltage from a single battery.

9V batteries can be both non-rechargeable or rechargeable batteries, featuring different chemistries.

A23, 8LR932, 1811A, V23GA, MN21, 8LR23, A23S Battery Equivalents and Replacements

A23 is alkaline cylindrical cell battery often used in small electronic devices requiring higher voltage, like home security systems, garage door openers, Bluetooth headsets, key-less vehicle entry systems and other similar radio-frequency transmitting and receiving devices.

AG4, LR626, LR66, 177/376/377, SR626, SR626SW Battery Equivalents

AG4, LR626, LR66, 177/376/377, SR626, SR626SW batteries are very popular non-rechargeable button/coin cell batteries, available in several chemistries and manufactured by practically all battery brands. These batteries are commonly found in wrist watches and similar small electronic devices requiring reliable power source.

How to Choose the Best Trolling Motor Battery

With all the available battery models and brands on the market, finding suitable trolling motor battery often can be daunting task, but it shouldn't be. But before getting new battery or battery pack, one should first write down few things, including size and weight of the boat, motor strength, required trolling time and of course, the funds allocated for the new trolling motor battery.

Battery Terms and Abbreviations - Glossary

When describing batteries and their features and characteristics, many abbreviations are used.

Knowing their meanings is very important, because that is the difference between getting the right battery and the wrong battery. And the wrong battery often can cause much more damage than its money worth ...

The Best RV Deep Cycle Battery

Deep cycle batteries for recreational vehicles (RVs) have very important purpose - they power onboard electronics and electrical devices while the vehicle's main motor is not working, while being off the grid. RV deep cycle batteries must tolerate deep discharge conditions and cyclic use, but they also must be resistant to vibrations, high and low temperatures, no usage for long time (sometimes for months) etc.

And since these batteries are far from being cheap, it is really important to choose them properly, according to the individual needs and requirements.

Lithium CR2032, DL2032, BR2032, ML2032, LiR2032, LR2032 Batteries - Equivalents and Replacements

Lithium CR2032 is very popular non-rechargeable lithium 3.0 V battery, often used in watches, calculators, medical equipment, remote controls, and other smaller electronic devices. Due to its very long shelf life (5-10+ years) and stable voltage, it is often used as memory battery in computers, servers, cameras, and other high-end electronic devices.

Thanks to its high demand and many manufacturers that offer these batteries, there is slight confusion regarding CR2032 battery equivalents and replacements. No wonder, since one can find batteries labeled as CR2032, DL2032, BR2032, ML2032, LiR2032, LR2032, E-CR2032, SB-T51, 5004LC etc.

How to Pick the Best 18650 Battery and Charger

Lithium ion 18650 batteries are very popular choice for high power devices that also require long lasting batteries in terms of capacity, low self-discharge rate and large number of charging and discharging cycles.

18650 rechargeable batteries come in countless versions, with many features, some of the most important being capacity, maximum pulse and continuous drain current, charging current, protective electronics, etc.

AG13, SG13, LR1154, SR44, SR44SW, 303, 357, A76, LR44 Battery Equivalents

AG13/LR44/SR44/SR44SW/357 button/coin cell batteries are very popular batteries, commonly found in wrist watches, small flashlights, some remote control devices and other small electronic units.

According to the IEC standard, this battery should be called LR1154 (alkaline) or SR1154 (silver-oxide). Sometimes shorter, two-digit code is used: LR44 for alkaline and  SR44 for silver-oxide batteries.

Many manufacturers use their own names for these batteries, but they also tend to add IEC and other standard codes, including short descriptions about the chemistry and other important features.