ACEBEAM ARC18650H-310A battery has a built-in USB-C port and can be charged directly with a USB-C cable or using a traditional charger like a ACEBEAM A4. It 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 smart charging circuitry and other integrated safety features through-out, this battery will safely work in the majority of button-top compatible devices.