Battery Charger, Battery Capacity Not Applicable, Charge Time 60 min, Battery Capacity Charged in 1-Hour 4 Ah, Number of Ports 1, Charging Port Voltage (1) 4V, Charger Input Voltage 20V AC, Charger Class Standard, Charging Type Sequential, For Battery Chemistry Li-Ion, Indicator Light Yes, For Use With Craftsman 20V MAX Batteries