OIGOGOI - Safer & Longer: OIGOGOI 7.4V 3000mAh rechargeable lithium battery enables the gloves to provide up to 8 hours of warmth on a low battery (full charge). The rechargeable hand warmers have overheat protection and come with UL,FCC,RoHS,CE certified batteries to keep you warmer and safer at the same time. Touchscreen & Waterproof: The sensitive touch screen function of your thumb and index finger allows you to use any electronic device in the cold winter without taking off your gloves. The palm part is made of superfine fiber material, which is more wear-resistant and non-slip. In addition, our warm electric heated winter gloves are breathable, waterproof and windproof, and keep your hands dry and comfortable during skiing, ice fishing, hiking, cycling and other sports. Unique & Thoughtful Design: Our ergonomic-design heating gloves fits the hands perfectly even during sports.