The 18V Stanley Fatmax V20 Battery Adaptor SBA100 is designed to convert 18V Stanley Fatmax V20 1.5Ah and 2.0Ah batteries for use with old 18V Stanley Fatmax Cordless Power Tools. Part of the new 18V Stanley Fatmax V20 Cordless System - power all your V20 tools with a common new and improved 18V Lithium Ion battery to let you power through work with ease.