Packing List: 7.4V 3000mAh Li-polymer Battery x 1 (Please full charge the battery before using it) Battery Specifications: Voltage: 7.4V, Capacity: 3000mAh, Watt: 22.2Wh, Type: Lithium Polymer, Model: HWX-B01, Weight: 95g, Dimentions:(L/W/T)2.5/1.7/0.5inches. Applicable Products: Use for heated gloves, heated socks, heated ankle wraps heated hats and other related heating products. Charging Port Type: 35135 DC Jack (outer diameter 3.5mm, inner diameter 1.35mm). If you need a charger, please purchase the charger separately. Battery Storage & Care: When clean the heating product or charge the battery, please remove the batteries from heating product. In order to effectively maintain battery working time, please charge the battery every six months when not in use. Please store batteries in a dry indoor environment CUEHEAT 7.4V Heated Glove Liners Rechargeable Lithium Polymer Battery, For DC 3.5mm x 1.35mm Port - Heated Glove, Mitten, Sock