You'll use more than your book smarts with this common sense backpack from STIHL. The AP battery backpack provides an ideal way to carry extra battery power, much like the AR backpack battery. While the AR backpack battery is a long-lasting battery option that offers nearly all-day operation for professionals, this backpack allows you to conveniently carry up to two STIHL AP System batteries in comfort and style. A lightweight and more affordable option, the backpack weighs less than the AR backpack battery series, and allows you to comfortably operate STIHL AP System battery-powered equipment* with ease for extended periods of time. It also features a multi-position cable management system, which enables you to adapt the backpack and connecting cord to suit the product in use. With its ergonomic design, adjustable straps, and loop handle for easy carrying and storage, the AP Battery Backpack is a great option for work on the go.