backpack with 2 18v 36 adapters 4 5ah batteries makita 191c50 5 pdc01 dual chargerBattery backpack for powering 18V LXT tools. The battery can be used with 18V and 18V X2 LXT series tools with a suitable adapter that fits the tool. The power pack can hold up to four batteries, providing power to your tool for a long time compared to using one or two batteries connected. The power pack sits well on the back and thus makes working comfortable and provides longer tool runtime. The backpack can also be used as a stationary backpack if