Promaster Go! Universal Digital Battery Charger Charges most digital camera and camcorder batteries Built-in power supply charges batteries with a voltage of up to 7.2/7.4v as many as 5 times while providing extended run time to your USB device Charge your battery or power your USB device from the internal power source, AC power or DC (optional DC cord required) LED power gauge shows remaining charge of your battery or of the internal power source.