Universal lithium battery charger for battery: 18650,18550, 16340, 14,500, input voltage: 100-240V output voltage: 4.2 V/V 3.65 recharge current: 650mA charging red light, full of green, constant voltage recharge, the special chip control. Have the overcharge protection, over-power protection, reverse connect protection,, suitable for LED flashlight, batons, digital products of lithium battery.