Acebeam 21700 5100mAh USB Rechargeable Li-ion Battery

The Acebeam 21700 5100mAh Rechargeable Li-ion Battery can be charged using a traditional charger like an Acebeam A4. The battery has been designed for powering high-drain devices such as high-output flashlights, lanterns, headlamps, and bike lights, as well as a variety of other appliances and devices. With built-in USB C-Type charging port, smart charging circuitry and other integrated safety features throughout, the Acebeam 21700 5100mAh Rechargeable Li-ion Battery will safely work in the majority of button-top compatible devices.