Black Bull BFC12 Automatic Battery Float Charger Keep your battery fully charged in storage or during cold weather Use on 12 volt DC batteries, 53 inch battery lead cables Output - 12 volt DC, 600 mA, maximum output - 13.5 volt DC, Capacity - 5 to 125 Ah batteries, Input - 120 Volts AC, 60 Hz, 14 watts Meter display shows when battery is charging