AWOEZ Rechargeable Li-ion Battery Heated Thermal Warming Electric Gloves Waterproof Wind-resistant for Ski Snowboard Winter Outdoor Sporting No More Heavy Dry Batteries, No More Repeating Fee of Dry Battery again. Battery capacity: 3.7v/4400MAH Li-ion, continue working around 3-4 hrs with fully rechargeable Batteries Humanized design with a holding temperature of 35-55celsius, suitable for the human boday thermal for fingers and hand back Waterproof and wind-resistant, fashion and classic design