Glovii heated clothing is a unique solution allowing you to maintain thermal comfort even on the coldest days of the year. Glovii products stand out, thanks to the use of heated carbon fibres, which have a positive effect on blood circulation by emitting infrared waves. Glovii clothing was designed with sportspeople in mind, especially those practising winter sports. It\x92s also a perfect solution for bikers, construction workers, hunters, photographers and elderly persons. Technical Data: Battery: 7.4 V, 4000 mAh (29,6 Wh), Li-Ion Case included Weight: 150 g Capacity: 4000 mAh Power: 8-4 V, 1-2 A Dimensions: 40x30x8 mm Compatibility: Fleece vest GV1 (all sizes) Glovii GLI7440 Battery for Heated Fleece Vest