The data below is based on testing with a fully charged battery. For heated vest: 3.5-5 working hours at 45-55°C. 5-6.5 working hours at 35-45°C. Low Mode: about 10-12 working hours at 30-40°C. Preheat For heated jcaket: Low Mode - 16h Medium Mode - 10h High Mode - 6h For heated socks: Controller Red Light High Level:Using time = 3 hours Controller White Light Medium Level:Using time = 4 hours Controller Blue Light Low Level:Using time = 6 hours