Battery Specification: 2500mah rechargeable battery 3c for power tools, full capacity, high cycling, low internal resistance and ultra-low self-discharge to meet the requirements of your power products. Capacity: 2500 mAh Minimum Capacity: 2480 mAh Discharge Rate: 3C Nominal Voltage: 3.7V Internal Resistance: 25m© Cycle Life: 500 Charge Voltage: 4.2V 0.03V Charge Current: 0.5C (About 3 hours) 1C (About 2 hours) Standard Discharge Mode: 0.2C Constant current discharge to 2.75V Max. Continuous Discharge Current: 7500mA Operating Temperature Range: Recharge (0-45°C) Discharge (-20-60°) Long time Storage Temperature: -20~25°C Initial Size: Diameter:18.15+0.20mm Height:65.0 0.50mm