Color Blue Brand N/A Model 18650X4 Quantity 1 Piece Material Lithium-Ion Cell Type Lithium Ion Battery Model 18650 Head Type Flat Top Mark Capacity No mAh Actual Capacity 8000 mAh Voltage 3.7 V Rechargeable Yes Rechargeable Times Others 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 1 Mode 18650 2 size 18*650mm 3 Charge voltage 4.2V 4 Nominal voltage 3.7V 5 Nominal capacity 8000mAh 6 Charge current Standard Charging:0.5C Rapid charge1.0C 7 Standard Charging method 0.5CCCconstant currentcharge to 4.2Vthen CV(constant voltage 4.2V)charge till charge current decline to0.05C 8 Charging time Standard Charging3.0hours(Ref.) Rapid charge2hours(Ref.) 9 Max.charge current 8000mAh 10 Max.discharge current (8000mAh) 11 Discharge cut-off voltage 2.75V 12 Operating temperature Charging0~45 Discharging0~45 13 Storage temperature -20~ +60 14 Cell Weight Approx200g Packing List 1 x Battery