The thermal jacket with battery in size XL is windproof and waterproof, ideal for keeping warm in cold construction conditions. It features two heating zones on the back and shoulders, and the battery is stored in the back pocket. It has two heat levels and a heating duration of up to 28 hours on low level, 16 hours on medium level, and 8 hours on high level with a BL1850 (b) battery. It is made with nylon outer material, polyester filling, and nylon lining. The battery voltage is 14.4/18 V and the total weight, including the BL1860B battery, is 1.2 kg. The shipment includes a battery adapter. It is worth noting that it is not suitable for people with pacemakers.