21700 4000mAh 40A Button
21700 4000mAh 40A Unprotected Button Top
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The TrustFire IMR 21700 Battery is a high drain rechargeable battery designed for high-drain devices.
With a 4000mAh nominal capacity, the TrustFire IMR 21700 battery will provide power, longevity and the button-top design will align to your device’s safety needs.
The TrustFire 21700 Rechargeable Li-ion Battery (4000mAh, 3.7V) equals the power of 2400 AA batteries.