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 Other size and capacity can be made according to your request.