Color Black Brand UltraFire Model ZS-07 Quantity 1 Piece Material Lithium ion Cell Type Lithium Ion Battery Model 18650 Head Type Button Top Mark Capacity 3600 mAh Actual Capacity 1000 mAh Voltage 3.7 V Rechargeable Yes Rechargeable Times Others1000 times Built-in Protected Circuit No Over Voltage Protection No Short-Circuit Protection No Over-Charging Protection No Over-Discharging Protection No Mercury Free Yes Other Features Charger Input: AC 100~240V / 50~60Hz Charger Output: 4.2V / 250mA Packing List 1 x 18650 Lithium battery 1 x US Plug charger (100~240V / 50~60Hz)