Updated: 17 Feb 2025

21700 cells

Updated: 17 Feb 2025

#1

Best Choice
MLGBDC 8 PCS 21700 Rechargeable Battery Flat Top 3.7V Li-ion Cell 5000mAh Large Capacity for Headlamp, Flashlight, Toys

9.8

MLGBDC

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Main highlights

【Product size】70*21*21mm (2.76*0.83*0.83 inch),21700 3.7V batteries.

【Multi-Application】21700 5000mAh Rechargeable Battery for headlamps, flashlights, doorbells,alarm clock,toys and other necessary devices

21700-5000mAh flat top rechargeable battery with charger , Please pay attention to the size before you buy.
#2

Value for Money
BENKIA 21700 Rechargeable Battery 3.7V 5000mAh Large Capacity Flat Top 4 Pack Lithium Batteries for LED Flashlight Headlamp

9.7

BENKIA

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Main highlights

【Multi-Application】 Large capacity 21700 rechargeable battery is compatible with versatile devices, such as headlamps, flashlights, doorbells,small fans,remote controls, alarm clock,toys,etc. Helps you start your devices quickly

【High Capacity】Long lasting 5000mAh 21700 battery, easy to charge. Support stable 3.7volt output voltage, makes the devices work more stable and lasting longer, ideal replacement batteries for high frequently used devices

【Dimension】Flat Top size: 70*21*21mm(2.76*0.83*0.83inches). NOTE: Please confirm whether the battery size and battery type before purchase
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#3
EcoSolutions 21700 Rechargeable Battery Case Set, 5000mah Large Capacity 3.6Volt 21700 Tip Battery for flashlights ect, 2pack

9.4

EcoSolutions

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Main highlights

Widely Compatible: 5000mAh 21700 Rechargeable battery large capacity,Which can be widely used for electronic devices, such as LED flashlights, emergency lights, portable devices, headlights, toys, remote controls, etc.

Reliability and Durability: High-quality manufacturing processes and materials ensure the stability and durability of it, allowing them to perform exceptionally well in various environments and usage conditions.

Product Size: 21*21*70 mm (0.82*0.82*2.75 inches),it's a 3.6 volt rechargeable battery, please check carefully before purchasing !).Please confirm whether the battery model required by your device.
#4
BFHB 21700 Battery Case Set 5000 mAh for Flashlight - 2 Pack

9.2

BFHB

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Main highlights

Wide Compatibility - With the standard size, these batteries are compatible with many flashlight brands and other electronic devices, including LED torches, portable devices, headlights, toys, cameras and other household appliances. Providing users with a broader range of choices and flexibility.

Reliability and Durability - High-quality manufacturing processes and materials ensure the stability and durability of it, allowing them to perform exceptionally well in various environments and usage conditions.

Precision Design - Tailored for flashlights, these batteries set are seamlessly integrated with their corresponding battery cases, offering a safe and efficient power solution to keep devices operating optimally when needed.
#5
EcoSolutions 21700 Rechargeable Battery Case Set, 2pack 5000mah Large Capacity 3.6Volt 21700 Tip Battery for flashlights ect,

8.9

EcoSolutions

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Main highlights

Widely Compatible: 5000mAh 21700 Rechargeable battery large capacity,Which can be widely used for electronic devices, such as LED flashlights, emergency lights, portable devices, headlights, toys, remote controls, etc.

Reliability and Durability: High-quality manufacturing processes and materials ensure the stability and durability of it, allowing them to perform exceptionally well in various environments and usage conditions.

Product Size: 21*21*70 mm (0.82*0.82*2.75 inches),it's a 3.6 volt rechargeable battery, please check carefully before purchasing !).Please confirm whether the battery model required by your device.
#6
DQGG 3.7 Volt 21700 Rechargeable Battery 5000mAh Battery 2 Pack Large Capacity Batteries for LED Flashlight, Headlamps, etc

8.8

DQGG

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Main highlights

【Wide Application】5000mAh rechargeable battery, compatible with flashlights headlamps, etc. This kind of battery is bigger than most of batteries, please make sure you are buying the right ones.

【Product Advantage】No memory effect, they can be charged many times when fully or partially drained.

【Note】These are 21700 battery, please ensure that you are buying the right type of battery
#7
21700 Rechargeable Battery 3.7Volt Flat Top 5000mAh High Capacity for Flashlight Headlamp(2 Pack,21700 Battery+Charger)

8.6

PAOWANG

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Main highlights

【Multi-Application】Long lasting 21700 batteries for headlamps, flashlights, doorbells,alarm clock,toys and other necessary devices.Wake up your device at any time

【High Performance】With a large capacity of 5000mAh, 21700 rechargeable batteries can last at least 20% longer than other batteries, ideal replacement battery for used devices with high frequency

【Battery Size】70*21*21mm(2.76*0.83*0.83inches) It's a rechargeable battery FLAT TOP.Please confirm whether your device is suitable before purchasing
#8
21700 Rechargeable Battery 3.7V Flat Top Lithium Battery 5000mAh for Flashlights Headlamps Cameras Toys etc (No Charger Included, 4 Cells)

8.5

Generic

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Main highlights

【Specification】3.7 v￵￵olts, 50￵￵00￵￵m￵￵A￵￵h

【Size】70mm in length, 21mm in diameter. It is much more BIGGER than AAA battery and 18650 battery

【Application】21700 battery are usually used in Flashlights, Headlamps, Toys, Doorbells, Cameras, etc. Many power tools need this kind of battery to work.
#9
IMREN 18650 Battery Charger,21700 Battery Charger for 3.7V 14500 10400 18500 18350 18650 18700 20700 21700 22650 26650 Li-ion Battery,1.2V Ni-MH/Ni-Cd Battery,4 Bay 18650 USB C Battery Charger

8.4

Imren

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Why we love it

Charges multiple battery types simultaneously and separately.

Adjustable charging speeds for faster or slower charge times.

Portable with USB-C for on-the-go charging.

Main highlights

Universal Compatibility and Safety Features
Supports a wide range of battery types (1.2V Ni-MH Ni-Cd, 3.7V Li-ion) with anti-short function and adjustable charging current (0.5A, 1A, 2A).

Versatile Charging Scenarios
Ideal for users needing to charge multiple battery sizes simultaneously, including 18650, 21700, and 20700, with USB-C portability for on-the-go charging.

Adjustable Charging Amps
Customers appreciate the ability to adjust charging currents (0.5A, 1A, 2A) for faster or more efficient charging, enhancing battery lifespan and performance.
#10
21700 Rechargeable Battery 3.7V Flat Top Lithium Battery 5000mAh for Flashlights Headlamps Cameras Toys etc (1 Charger Included, 2 Cells)

8.3

Generic

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Main highlights

【Specification】3.7 v￵￵olts, 50￵￵00￵￵m￵￵A￵￵h

【Size】70mm in length, 21mm in diameter. It is much more BIGGER than AAA battery and 18650 battery

【Application】21700 battery are usually used in Flashlights, Headlamps, Toys, Doorbells, Cameras, etc. Many power tools need this kind of battery to work.

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21700 cells

MLGBDC 8 PCS 21700 Rechargeable Battery Flat Top 3.7V Li-ion Cell 5000mAh Large Capacity for Headlamp, Flashlight, Toys

9.8

Main highlights

BENKIA 21700 Rechargeable Battery 3.7V 5000mAh Large Capacity Flat Top 4 Pack Lithium Batteries for LED Flashlight Headlamp

9.7

Main highlights

EcoSolutions 21700 Rechargeable Battery Case Set, 5000mah Large Capacity 3.6Volt 21700 Tip Battery for flashlights ect, 2pack

9.4

Main highlights

BFHB 21700 Battery Case Set 5000 mAh for Flashlight - 2 Pack

9.2

Main highlights

EcoSolutions 21700 Rechargeable Battery Case Set, 2pack 5000mah Large Capacity 3.6Volt 21700 Tip Battery for flashlights ect,

8.9

Main highlights

DQGG 3.7 Volt 21700 Rechargeable Battery 5000mAh Battery 2 Pack Large Capacity Batteries for LED Flashlight, Headlamps, etc

8.8

Main highlights

21700 Rechargeable Battery 3.7Volt Flat Top 5000mAh High Capacity for Flashlight Headlamp(2 Pack,21700 Battery+Charger)

8.6

Main highlights

21700 Rechargeable Battery 3.7V Flat Top Lithium Battery 5000mAh for Flashlights Headlamps Cameras Toys etc (No Charger Included, 4 Cells)

8.5

Main highlights

IMREN 18650 Battery Charger,21700 Battery Charger for 3.7V 14500 10400 18500 18350 18650 18700 20700 21700 22650 26650 Li-ion Battery,1.2V Ni-MH/Ni-Cd Battery,4 Bay 18650 USB C Battery Charger

8.4

Why we love it

Main highlights

21700 Rechargeable Battery 3.7V Flat Top Lithium Battery 5000mAh for Flashlights Headlamps Cameras Toys etc (1 Charger Included, 2 Cells)

8.3

Main highlights

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