Internal resistance:10-15mΩ Max Continuous Rated Discharge: 10C Dimensions: 65.5 mm (L) x 18.5 mm (D) Weight: 45g±2g Discharge Cut-off Voltage: 2.5V Nominal voltage: 3.7V Full Charge Voltage: 4.2V ± 0.05V Protected: No, Unprotected Standard Charge: Constant Current 1000mA, Constant Voltage 4.2V, & Cut-Off 100mA Rapid Charge: Constant Current 2000mA, Constant Voltage 4.2V, & Cut-Off 100mA Operational Charging Temperature Range: 0 to 50 degrees Celsius (best below 45 degrees Celsius) Operational Discharging Temperature Range: -20 to 75 degrees Celsius (best below 60 degrees Celsius)