Details FreeSpeak Edge® Lithium-Ion Battery For use in FreeSpeak Edge beltpacks Item Code BAT80 Technical Specifications Battery Type of Cell: Rechargeable lithium Ion Voltage: 3.6V Capacity: 4400mAh Temperature Operating: 32° to 113°F (0° to 45°C) Storage: -22° to 158°F (-30° to 70°C) Humidity: 20°C to 90% Non-Condensing Dimensions Battery: 3.25x2.3x0.69in (HxWxD) (82.6 x 58.4 x 17.5mm) Weight Battery: 3.9oz (0.11kg)