TC200-PAN-i Two-Position Battery Charger for Panasonic CGA-D54/CGR-D54 features two integrated battery plates supporting Panasonic and non-OEM CGA-D54/CGR-D54 batteries. It's capable of charging two batteries simultaneously and charges a typical 5600mAh battery in about 3.5 hours. As a battery is being charged, a diagnostics LCD displays status in volts, amp hours, and percentage of charge. The percentage of charge is estimated using a proprietary algorithm. An auto-detecting USB port is available for charging phones, tablets, and other USB devices; it works when the charger is plugged into AC power as well as on-the-go off of an attached battery.