In addition to powering the expanding line-up of 18V cordless tools and accessories, Makita 18V batteries can help you keep cooler in hot job site conditions. The 18V LXT® Cordless Fan Jacket has a power source that accepts Makita 18V LXT® and 18V Compact Lithium-Ion batteries that powers air circulation inside the jacket for up to 12 hours of run time on the high setting when using a 5.0Ah battery (BL1850 sold separately). You can also keep your portable electronic devices charged-up with the convenient on-board USB power port. The Fan Jacket has three air flow modes plus turbo mode so you can adjust the air flow to the work conditions. The knitted cuffs and waist provide a better fit to help keep the air circulating inside the jacket. It has a zippered chest pocket that is ideal for a cell phone or other accessories, as well as left and right side pockets and a sleeve pocket. The battery slides onto the power source, which has an on/off button and mode indicators as well as a belt clip so it's out of your way but within reach for quick and easy access. The 100% polyester is machine washable when the fan and power source are removed. It’s part of Makita’s expanding 18V Lithium-Ion series, the world’s largest cordless tool line-up powered by an 18V Lithium-Ion slide-style battery. Makita 18V Lithium-Ion batteries have the fastest charge times in their categories, so they spend more time working and less time sitting on the charger.