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Acebeam's new 21700 battery with 6,400 mAh (22.4 Wh) is now available

Acebeam's AB21CP6425 battery has a USB-C port.
ⓘ Acebeam
Acebeam's AB21CP6425 battery has a USB-C port.
Acebeam's new high-capacity 21700 battery with 22.4 Wh is now available as a separate SKU. The battery features a USB-C port for recharging and a slightly lower voltage than most other 21700 batteries.
Accessory

Acebeam's 21700 rechargeable battery with 6,400 mAh/22.4 Wh, which was previously bundled with flashlights, is now available as a separately sold SKU. Acebeam has been listing the battery for a while, and some merchants have already received shipments.

The AB21CP6425 battery offers one of the highest capacities for the 21700 form factor, even though the voltage is just at 3.5 V which affects the watt-hours while the mAh value remains high. However, the AB21CP6425 has still more capacity than a typical 6,000 mAh battery, which usually has a capacity of 21.6 to 22.2 Wh.

Acebeam also promises a high discharge rate at 25 amperes. An integrated USB-C port is available to recharge the battery if needed. There is also a small status light that switches from red to green once the battery is at capacity.

Acebeam offers the AB21CP6425 for 25 USD.


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> Expert reviews and news on laptops, smartphones and tech innovations > News > News Archive > Newsarchive 2026 09 > Acebeam's new 21700 battery with 6,400 mAh (22.4 Wh) is now available
Andreas Sebayang, 2026-09- 8 (Update: 2026-09- 8)