38120L(10Ah) Rechargeable LithiumIon Battery https://www.headway-lib.com/38120L-10Ah.html Nominal capacity 10Ah @0.5C Minimum capacity 9.5Ah @0.5C Nominal voltage 3.2V Max Charging voltage 3.65 ±0.05 V Discharge ending voltage 2.5 ±0.05 V Charge current: Standard charge: 0.5C Max charge: 2C when T≥10℃ Max charge: 1C when 10℃≥T≥0℃ Max charge: 0.1C when 0℃≥T≥-10℃ Discharge current Standard discharge: 1C Max discharge: 3C Max instant discharge: 6C Humidity range 0～90%RH (none condensing) Internal resistance ≤4mOhm (AC Impedance, 1000HZ) Cell Height: 125mm Max Cell Diameter: 38.5mmMax Cell Weight 320±5 g