Capacity: 4500mAh, 6500mAh, 8000mAh, 8500mAh, 9000mAh,2D18000mAh Nominal Voltage:1.2 V Nominal charging time: 14 hours Fast charging time: 1.2 hours (4500,6000mAh), 2.4 hours(8000,8500,9000mAh) Diameter: about 32.5mm Height: about 60mm Other size and capacity can be made according to your needs.