Model: 18500 Rechargeable Li-ion  Battery Voltage: 3.7V  Storage Voltage: 3.7-3.9V  Charging Cut-off Voltage: 4.2V  Discharge Cut-off Voltage: 3.0V  Capacity: 1400mAh  Norminal Capacity: 1350mAh  Size: 18.3*49.0mm Weight: 35g  Protected: NO  Battery top: Flat Button top  Max Constant Charging Current: 1400mA(1C)  Max Constant Discharging Current: 2800mA(2C)  Material: Lithium Li-ion ICR  Recharging cycles: More than 500cycles  Appliations: LED Flashlight, headlamp,  torch, headlight, and so on