What Did We Do? We used all the different batteries on the same Warmawear™ Deluxe Heated Glove Liner on a medium heat setting while it was inside our Warmawear™ Dual Fuel Burst Power Battery Heated Sports Gloves. These were then placed outside on a cold day with a digital thermometer placed inside the glove, at the very end of the fingers. Readings were taken every minute for the first fifteen minutes, and then in 5 minute intervals. With a huge range of batteries available, the choice of which battery to use can be unnecessarily difficult. Fortunately, we've done some of the hard work for you by comparing different battery brands in our Winter Warmawear™ selection. We compared the three main brands of battery; Panasonic, Duracell and Energizer Ultimate Lithium.