Heavy duty design meets maximum runtime. Truly durable, high capacity (31.1Ah) backpack battery for highest productivity and longest runtime. Robust design for guaranteed daily outdoor work in all types of weather. LED charge indicators on battery pack, plus exact battery charge percentage readable from adapter simplifies work planning for the user. Fits to advanced ergonomic harness that allows for a perfect fit. The easily detachable battery module means users can share batteries freely without swapping harnesses.