Capacity: 3500 mAh, 3600 mAh,4000 mAh, 4200 mAh, 4500 mAh, 6200 mAh and other capacity according to your request. Nominal Voltage:1.2 V Nominal Charging time: 14 hours , Fast charge time: 1.2 hours. Diameter: about 25.8mm Height:about 49.5mm