Rechargeable 3.7V 2200Ah Lithium Polymer Replacement Battery Pack(Two batteries), US Standard Dual Charger for Batteries Use for Heated Gloves, Socks, Hats, Vests, Jackets, Thermal Heated Underwear etc. Batteries Using Life: More Than 500 Cycles of Charging. Please Charge Every Six Months During Storage.
Parameter: Voltage-3.7V, Capacity:2200mAh/8.14WH
Input: DC 4.2V Output Power: MAX8W
Output adjust by three step!
Used for heated socks, gloves,hats, vests, jackets, thermal underwear, etc.