In addition to powering the expanding system of 18V cordless tools and accessories, Makita 18V batteries can help you keep warm in cold, harsh job site conditions. The 18V LXT Cordless Heated Jacket has a power source that accepts Makita 18V LXT and 18V Compact Lithium-Ion batteries for up to 35 hours of heat (with 6.0Ah battery, sold separately). You can also keep your portable electronic devices charged-up with the convenient on-board USB power port.