The 5 Best 21700 flat Top Batteries (2023 reviews)

This battery cell should be charged on a dedicated charger rated specifically for cells. It is much larger than the standard 18650 battery. They hold charge well and have way better battery life than 18650s. They provide lots of power and last a long time.

These are flat top batteries and do NOT have a button-top so ensure your device does not require a button-top battery. It is perfect for the vape mod. They come in a nice battery case to keep them clean. It is measured using 5500mah series battery under laboratory conditions.

Why We Like This:

Strong battery that will keep up with your chain vaping habit
High capacity 21700 lithium polymer batteries
Holds the charge for a while

Best Runner up: LCLEBM Good Battery

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The battery box container is made of high quality material, which helps protect the battery, the material is environment friendly and no pollution to the environment. It also looks good and feels good. It comes with a battery charger but aside from that it is overall a well made battery. This battery is slightly longer, so it will fit. It comes with many possible uses.

Why We Like This:

Very high current, high output battery
Definitely will power your device and last a long time before needing a charge
More fussing with the little battery pack
Well constucted looking batteries with a handy battery box

Best flat Top Type: Soocool 21700 flat Top Battery

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The soocool 21700 flat top battery is capable of outshining several other battery featured in this list in overall features for the price point.

Why We Like This:

Simply charge with high quality usb cable, no additional battery charger required
Bigger and longer than aa and aaa battery
Good investment for long term

Best With Versatile devices: Cbjj 21700 flat Top Battery

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This 3.7V 21700 rechargeable battery is compatible with versatile devices, such as headlamps, flashlights, electric scooter, toys, etc. Its Long-lasting 5000mah 21700 battery is with large capacity which supports stable power for your devices and effectively prevent damage of the devices, such as a perfect replacement battery for used devices with high frequency.

This flat top 21700 battery is without memory effect and provides safe protections to protect your devices, including short circuit, overcharge, and overcurrent protection. It has design that is convenient for home use and outdoor use. It is compatible with versatile devices, such as headlamps, flashlights, electric scooter, toys, etc.

Why We Like This:

Good investment for long term
Lot of satisfied buyers

Best Premium: IMREN 21700 flat Top Battery

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Imren line of battery come in a pretty wide variety of styles, so you can definitely find one that suits your individual preferences and needs. It has a micro-usb port for charging, easy to charge with the included 2 in 1 usb-c cable, no additional battery charger required. It is compatible with hmr70 headlamp.

Why We Like This: