We removed the battery! Through an innovative and simple-to-use lanyard power system worn under your outer jacket, a single battery pack is placed in any internal jacket or pants pocket away and off your hands (weightless) - A much safer and convenient location for the battery. Heat levels are adjusted in both hands through the push of a single button on the chest controller rather than fiddling with controls on each glove. The lightweight battery pack slips into any pocket on your body and a chest controller adjusts to three heat levels with just a few presses of a button.