Low voltage pre-charging Short circuit protection CC/CV charging method Dynamic battery resistance compensation to deduce charging time Dual LED indicating light, Detected function of battery status Chargerx1 1.Charger input voltage(directly connect to lead storage battery) DC5V-12V 2.AC Switching Power adapter, Input voltage :AC 100V-240V 50Hz-60Hz 3.Charge current:Approx. 60mA 4.Charge time:Approx. 130 mins 5.Full charge voltage:Approx. 4.2V AC Switching Power adapterx1 DC power switcherx1