Best 4 V Batteries in 2026

Solar PRO technology – Tenergy engineered solar AA batteries with technology addressing common solar light battery performance problems: leaking due to over-charging from long sunny summer days, dead batteries due to over-discharging from extended rainy or cloudy days. Tenergy is a Silicon Valley based company with over 15 years of experience in batteries.

Year around outdoor durability – Power your solar lights all seasons under all weather conditions. Engineered and produced to deliver an extended battery life with solar lighting application environment in mind; special formula withstands freezing cold and blistering hot outdoor temperatures.

Long battery life – With 2,000 charging and discharging battery life, Tenergy Solla rechargeable AA batteries outlast 4 to 5 times more than regular NIMH AA battery life. Tenergy Solla NIMH AA battery can power your solar lights up to 5 years, no more changing your solar light battery every 1-2 years. Generate more long-term savings when replacing regular solar garden light batteries.

Multiple uses - Popularly used for solar powered garden lights, landscaping lights, lawn lights, etc. Can be used with popular brands of solar garden lights including Intermatic, Malibu, and many others. Also functions as a standard rechargeable household AA battery, replace all alkaline disposable batteries that power your TV remotes, wireless mouse and keyboards, gaming controllers, RC remotes and others.

As a rechargeable high capacity AA battery, it is built with 1000mAh capacity rating that translates to a longer use time. Typical batteries only have a 600mAh or 800mAh, so power your devices with our Tenergy AA NiCd battery that allows you to use your devices longer while making the most off its single charge.

Tenergy 1.2V AA NiCd Rechargeable Batteries measures 14.2 mm (Diameter) x 50 mm (Length).

High power energy - Tenergy's 24 pack Premium rechargeable batteries offers 2500mAh capacity. Generate long term energy savings by switching your household AA batteries to rechargeable batteries.

Professional performance - Premium NIMH AA rechargeable battery are trusted by photographers to deliver faster refresh rate.

Wide temperature range - AA size rechargeable batteries are enhanced to deliver consistently high power performance, whether outdoors in -4°F or 122°F.

Contains 1.5V Alkaline D batteries 12 pack.

D cell batteries designed for everyday applications like flashlights, baby swings, baby cradles, radios, stereos, emergency lamps, electric candles, security lights, and more.

Anti-leaking tight seal design and date coded freshness, holds the power in for up to 10-years until it is needed.

PEAK PERFORMING PACK - Increase the runtime of your RC unit with a battery that will go the distance! Tenergy 9.6V rechargeable NiMH battery pack features a high capacity rating of 2000mAh.

COMPATIBLE WITH POPULAR MODELS - Suitable for various applications, the 9.6V RC battery pack will work with most hobby units such as RC monster trucks, Lionel Polar express trains, Tonka ricochet RC trucks, RC beetles, RC Hummers, Traxx Tyco cars, radio shack RC cars, and Nikko RC cars. NOT compatible with Spike the Dinosaur.

MINIMAL MAINTENANCE - Easy to operate, our RC replacement battery requires minimal maintenance. Recharge anytime without needing to discharge and drain the battery.

Longer runtime 9V - Tenergy's 12 pack 9V Lithium batteries offer 2.5 times more power than traditional 9V batteries. Provides enough power to last up to 10-years as a backup battery in ac-powered smoke detectors.

Low self-discharge - Tenergy 9volt lithium battery features ultra-low self-discharge of only 2% a year and are date stamped for freshness. These batteries will provide power, even after 10 years in proper storage.

Rounded fit - Tenergy's non-rechargeable batteries 9 volts is slightly slimmer with rounded edges and corners ensuring a wider fit in 9volt electronics.

Long lasting power - Tenergy's 2 pack Centura 9 volt battery for smoke alarms offers the. Generate energy savings by switching from standard single-use 9V size batteries to rechargeable batteries.

Low self-discharge - Centura 9 volt size battery is a low self-discharge 9V battery, which means it can retain up to 85% of capacity when properly stored and unused for up to a 1 year.

Extended cycle-life - Rechargeable up to 2,100 times without significant capacity lost.

Tenergy’s Premium Pro 4 pack rechargeable AA batteries have 1100 mAh capacity. Generate long term energy savings by switching to rechargeable batteries.

Premium Pro batteries AAA are trusted by photographers and professionals to deliver faster refresh rate than single-use batteries.

Enhanced AAA rechargeable batteries deliver high power performance, whether outdoors in -4°F or 122°F.

AA and AAA package of 12 AA and 12 AAA rechargeable batteries

Exact replacement for standard AA and AAA size battery in all the devices

Can be recharged for up to 1000 times, providing big saving by replacing hundreds of throw away AA/AAA batteries.

High power - The Tenergy 3V Lithium CR123A batteries are best used for these common applications: photo equipment, camera equipment, smart sensors, light meters, security cameras, and much more. Make sure you are maximizing the most of your electronic devices ability by delivering the best power.

Long lasting - The Tenergy Lithium CR123A 3V one-time-use batteries have high energy density that will last 3-5 times longer than alkaline one-time-use batteries when using in high drain devices. **These are NON-rechargeable/one-time-use/disposable batteries. Please DO NOT recharge.

Replace and upgrade - This CR123A can replace the following models and sizing names: CR123, DL123A, K123A, EL123AP, VL123A, 5018LC, and CR17345. Dimensions: 17 mm (diameter) x 34.5 mm (length)

Tenergy's 2 Pack high capacity of 2000mAh RC receiver battery pack with Hitec connector delivers 4.8V of power, can be rapidly charged so that you spend more time with your hobbies. The long runtime makes this an ideal hobby battery pack for better longevity.

The Tenergy rechargeable NiMH battery pack with Hitec connector works with most popular model RC airplanes and RC helicopters receivers. It can be used with popular brands such as Hitec, Futaba, JR, and many more.

NiMH RX battery pack is ideal for radio receiver planes with a Hitec connector. It manages to pack a powerful punch while weighing in at only 0.24 lb/3.84 oz and measuring 2.28"x 2.05"x0.59".

24 pack of Tenergy 9V Alkaline batteries are designed to deliver high performance and reliability.

Provides long-lasting power in a wide range of devices: smoke/fire detectors, guitar pickups, microphone, cameras, and much mor

Trusted to operate in temperatures of -4 to 129 degrees Fahrenheit.

48 Pack of AA batteries and 24 pack of AAA Tenergy alkaline batteries.

1.5V alkaline batteries designed for everyday applications like wireless mouses, keyboards, clocks, flashlights, toys, remote controllers.

Anti-leaking tight seal design and date coded freshness, holds the power in for up to 10-years.

High capacity of 2000mAh RC receiver battery pack with Hitec connector delivers 9.6V of power, can be rapidly charged so that you spend more time with your hobbies.

Battery compatibility - The NiMH Receiver RX battery compatible with the following Futaba radios: 8UA(F/P)S, 8UA(F/P), 8UH(F/P)S, 8UH(F/P), 7NFK, 6NPK, 6YF, 6DA, 7C Series. It is specially designed for Airtronic and Hitec RC air transmitter.

Battery for plane radio receivers with Hitec connector for . Weighs 0.5lb/ 8 oz and measures 3.97"x1.18"x1.18".

Ideal for popular 7.2V RCs - Use Tenergy replacement RC battery for your radio controlled brands and hobbies with RC cars, RC tanks, RC trucks, RC boats such as Traxxas, LOSI, Team Associated, HPI, Kyosho, Tamiya brands, RC10 cars, and turntables. Will also fit many other series and models, we recommend matching the connector and measuring the RC unit battery compartment for best fit.

The Tenergy 7.2V NiMH Battery Pack has a capacity rating of 3000mAh that can run your RC car and related applications much longer.

Hobby battery charger - Tenergy universal charger is for most RC hobbies and airsoft guns because it has a standard Tamiya connector, standard to mini Tamiya adapter and standard Tamiya to alligator clips adapter. Works great for any 7.2V, 8.4V, 9.6V 10.8V, and 12V NiMH/NiCd battery packs in RC cars, RC airplanes, RC helicopters, RC trucks, RC tanks, RC boats and airsoft that use a standard Tamiya/mini Tamiya/alligator clips.

Includes Tenergy’s 8.4V rechargeable battery pack and compatible charger, the battery pack has 1600mAh capacity and is made of 7-cell 2/3A NiMH batteries.

Compatible with airsoft guns like MP5, SCAR, M249, M240B, M60, RPK, PKM, G36C, M4A1-RIS/M4A1, CAR 15, MP5SD6, MC51, FNP90, G3A4, and others. For upgraded and/or modified AEGs, we recommend measuring the gun compartment for best fit.

Tenergy's 8.4V AEG battery features rapid charge up, long runtime, and compatibility with the Tenergy 6V-12V RC battery charger.

Tenergy’s battery pack provides 1600mAh capacity and 8.4V. This NiMH rechargeable battery pack is made of 7 cell 2/3A NiMH cells.

Fits popular models of airsoft guns like M4, G36C, M4A1-RIS, M4A1, CAR15, MP5A5, MC51, FNP90, AUGRT, AUGM, G3A4, G36 and STEYR, and others. For upgraded and/or modified AEGs, we recommend measuring the gun compartment for best fit.

Tenergy's 8.4V NiMH battery features rapid charge up, long run time, and compatibility with the Tenergy 6V-12V RC battery charger.

Long lasting Power - With a 100 AA and 100 AAA Alkaline Battery pack, Tenergy gives you the best value for batteries at an affordable cost. Long lasting and high performing, these AA and AAA batteries will go the distance for all your electrical needs. Stock up and keep your electronic devices ready to go, never worry about dead-battery problems again.

Power household electronics - A performance you can count on, our batteries function as the best household AA/AAA batteries to power your electronics. Best used on everyday applications such as wireless mouse & keyboards, clocks, flashlights, toys, remote controls, and much more!

Reliable performance - Even at temperatures as low as -4°F degrees or as high as 129°F degrees, the Tenergy alkaline AA/AAA 1.5V batteries will still operate at optimal performance. Rest assured knowing that Tenergy stands behind the performance of our batteries.

AAA battery charger and rechargeable batteries bundle includes 8 rechargeable AAA batteries and compatible TN145 charger

Tenergy's AAA battery rechargeable with charger are ideal for everyday electronics like TV remote controllers, keyboards, mouses, flashlights, clocks and many more

AAA rechargeable batteries are long lasting and have 1000mAh capacity

Power when you need it - The Tenergy Rechargeable Sub-C batteries offer reliable performance at an inexpensive cost. This 15 piece NiCd set features a flat top design with tabs (for soldering). At 1.2 volts with a 2200mAh high capacity, it provides power when you need it when the unexpected happens.

Continuous energy - Power your high drain devices with our batteries that have a high capacity of 2200mAh to provide continuous energy. Always ready to perform, the Sub C cells are created to last for the duration of your specific electronic purpose.

Recharge and save - Constructed with the best technology, the enhanced Tenergy Rechargeable SubC Battery performs well above the rest. Decrease the carbon footprint left behind from disposable alkaline’s and switch to reusable power sources. At combo pack costs, save the environment and on your wallet.

4500mAh capacity replacement Roomba battery. More capacity than the original Roomba 3000mAh capacity. This will give you a longer run time on the vacuum before needing a charge.

Replace and upgrade - A perfect iRobot replacement battery, easy to replace and install directly. Also compatible with some Discovery Vacuum, Dirt Dog Vacuum, Create Vacuum models.

Easy to charge and connect APS battery compatible with Roomba FloorVac models.

Replace your single-use C size batteries with these rechargeable C Cell batteries . Dimensions: 50mm (Length) x 26mm (Diameter), standard C size battery.

Money saving eco-friendly - Tenergy NiMH C cell batteries can be recharged up to 1000 times and between 1-10 charges will have paid for themselves.

Everyday usage - NiMH C size battery has 5000mAh capacity and is designed for high/low draining electronic items such as LED flashlight, LED candle, emergency lantern, portable radio, cassette recorder, solar lights, baby toys, baby equipment, megaphone speaker, and much more.

Replace standard batteries - Exact replacement for the everyday standard D battery. Replace your D sized disposable batteries with our rechargeable 1.2V D cell battery. Dimensions: 61.5mm (length) x 33mm (diameter), standard D size battery.

Money saving eco-friendly - Tenergy D cell rechargeable batteries can be recharged up to 1000 times and between 1-10 charges will have paid for themselves. Switch over. Save. Reuse. Recharge with Tenergy.

Everyday usage - D cell rechargeable batteries is ideal for high/low draining electronic items. Use it in all your household devices such as flashlights, camping gear, clocks, radios, portable electronics, and much more.

Includes Tenergy T9688 smart universal battery charger comes with 26 pack of Premium rechargeable batteries. This combination package includes AA/AAA/C/D/9V sizes that are ideal for electronic devices like controllers, flashlights, kids toys, wireless mouse, digital cameras, etc. (*Note: Charger is NOT compatible with flat top batteries.)

Easy-to-use - The intelligent battery charger streamlines usability by providing automatic charging current for different sized batteries. Cycle batteries by using the automatic charge or discharge functions.

T9688 smart rechargeable battery charger features a shut-off timer, short circuit protection, non-rechargeable/bad cell detection, a short-circuit protection, a negative delta V cut-off function (except for 9V batteries).

Long run-time - Tenergy's high capacity rechargeable NiMH battery combo includes AA (2500mAh), AAA (1000mAh), C (5000 mAh), D (10000 mAh), and 9V (250mAh) batteries. Replace your disposable alkaline batteries with these high performance rechargeable batteries.

Save money - One of the most cost-effective NiMH rechargeable batteries available. Tenergy's AA AAA C D and 9V rechargeable battery solutions can be reused up to 1000 times, easily paying for themselves after 10 charges and saving thousands of dollars long term.

Everyday battery replacement - This household AA/AAA/C/D/9V battery pack is ideal for high and low drain electronic devices such as TV remotes, gaming controllers, smoke detector/alarms, flashlights, cameras, and much more.

Longer lasting battery - As an iRobot replacement battery, it’s been built to have up to a 1000 recharge cycle life span. With improved battery longevity, it will maintain its performance consistently ensuring that your home stays routinely clean.

Upgrade and replace - A cleaning system is only as strong as the battery allows it to be. Get the powerful 14.4V Roomba Battery as a direct replacement to the in-house standard unit. With a 3850mAh rated capacity it stores more power meaning longer run times depending on usage. Compatible with these select iRobot models: 500, 510, 530, 532, 535, 536, 540, 550, 551, 562, 570, 572, 580, 590, 610, 760, 770, 780, 790, 880, 960 and 980.

Improved design - The Tenergy NiMH rechargeable battery for Roomba features low self-discharge in which the battery will degrade at a much slower rate over time. This makes it an ideal battery to upgrade to as it’s designed to go the distance. Also it has no memory effect meaning it will retain its energy capacity after each charge. With a built in overcurrent and overheating protections the circuitry stands protected.

High power– Tenergy’s rechargeable D size battery is designed for enhanced performance in high drain applications such as emergency radios, emergency lighting, portable devices, power tools, and more.

Longer runtime – Tenergy’s high capacity D size NiCd battery has 5000mAh will give longer and more uses per charge.

Generate energy savings – Rechargeable up to 1000 times, save hundreds of dollars by eliminating frequent purchases of one-time-use D Alkaline batteries.

High power energy - Tenergy’s Premium rechargeable NiMH D Battery Packs offers 10,000mAh capacity. Generate long term energy savings by switching from alkaline household D battery to rechargeable batteries.

These Premium D batteries consistently deliver high power to Wi-Fi enabled smart home devices.

These rechargeable D cell batteries are enhanced to deliver consistently high power performance, whether outdoors in -4°F or 122°F.

Standard AA batteries- High quality AA nickel metal hydride (NiMH) 1.2V rechargeable batteries with flat top and easy soldering tabs designed for battery packs. *Please note: these batteries are NOT intended for use with Vape devices.

Long run time - Each flat top battery is rated 2000mAh capacity and provides a longer run time on a single charge. Compared to typical NiMH batteries which only have 1000mAh capacity, these batteries offer nearly double the run time.

Replace old battery packs - Tenergy's rechargeable AA batteries are ideal for making replacement battery packs for electronic devices like electric shavers, beard trimmers, facial hair trimmers, electric razors, portable cordless vacuums, floor sweepers, oral irrigators, rotary tools, toothbrushes, etc. Check the original battery pack to confirm they're made from AA size batteries.

Tenergy NiMH rechargeable D batteries and T9688 Charger can be recharged up to 1000 times and practically pay for themselves after 10 cycles. Reducing your carbon footprint by limiting the waste caused by disposable batteries. Switch over. Save. Reuse. Recharge with Tenergy.

Rechargeable 5,000mAh NiMH D size battery is perfect for high/low draining electronic items. Use it in all your household devices such as LED flashlight, LED candle, emergency lantern, portable radio, cassette recorder, solar lights, baby toys, baby equipment, megaphone speaker, and much more.

Tenergy's NiCd battery has 5000mAh capacity which means longer and more uses per charge.