Our dual-channel charger powers up to two batteries at once and is designed to work with Canon BP-820 and BP-828 camcorder batteries. The charger is compatible with various capacity / voltage batteries; its microchip automatically identifies the battery voltage and charges it accordingly to prevent overcharging. The LCD screen shows charging status for each battery separately. The charger is equipped with a USB port for charging other USB-based devices such as smartphones or cameras and comes with a free car adapter and power cord. It is fully compatible with the following Canon camcorders: