The 18V LXT Adapter adapts the Makita LXT Portable Backpack (PDC01, sold separately) for use with 18V LXT products allowing longer run time. The PDC01 is a portable power supply unit, a backpack that holds four lithium-ion batteries to provide longer run time when used with Makita 18V LXT products. The 18V LXT Adapter installs quickly and easily for added user convenience. It is made of high-quality materials for durable construction and long life.