Indicator light lets you know when charging is complete. Designed to charge your batteries quickly and safely. Input Voltage: 110-240V, 47-63Hz Output: 4.2V 600mA Charges 1 or 2 batteries simultaneously Dimensions: 3.34 in x 1.85 in x 1.49 in Weight: 2.46 oz. Ultrafire Li-Ion Rechargeable 14500 with IC Protection. Capacity: 1200mAh. Voltage: 3.6V. Can be used in laser pointer,Torch Flashlights and other electronic products.Over charge and discharge protection. Protection kicks in : 2.75v and 4.2v.Over-Charging / Draining at 4.2v / 2.75v