Dual charging port designed to charge two batteries at the same time Wide range compatibility of charge (8.4 V / 12.6 V / 16.8 V) Intelligent MCU control identify the voltage of the battery and prevent overcharge Charger plate is suitable for most CANON camera/camcorder batteries USB Output, perfect to charge your smartphone and other USB devices when the AC is plug to the wall LCD display the percentage of power level and current modes; High and low Charging method is CC/CV (Constant Current / Constant Voltage) with high efficiency Pre-charging feature allows to extend battery life