Robust design and maximum operating time. Very durable, backpack-mounted battery with high capacity (31.1 Ah) for maximum productivity and operating time. Sturdy design for daily use in any weather. LED charge indicators on the battery and precise display of battery charge status in percentage on the adapter facilitate work planning. Innovative, ergonomic carrying strap for a perfect fit. Thanks to the easily removable battery, users can swap batteries without having to take off the carrying strap. Removable support foot that can be used to set the backpack down on the ground without quickly getting the carrying strap wet and dirty. Battery backpack BLi950X, 36 V, 31.1 Ah, not suitable for battery lawn mowers.