Craftsman 20V Tools Battery Adapter, For Milwaukee M18 18V Battery, Works On ?Compatible with?--Only Suitable For DeWalt 20V MAX XR Lithium Battery (Not Compatible with Black and Decker 20V MAX Lithium Batteries).Only Suitable For Milwaukee 18V M18 Li-ion battery. Only Suitable For Craftsman V20 System Cordless Tools (Not Compatible with Old Craftsman 20V tools).This adapter works well. Now I don?t have to worry about buying more batteries. ?Warning?--This product is only compatible with the tools, not compatible with the charger, Don't use the adapter to charge the battery. When you need to charge the battery, remove the converter. ?Easy to use?--It goes on and off easily and does not jam while doing so. This saved you a lot of money from buying more charger and batteries. ?Switch your tool to battery?--Professional compact design, let your tools and batteries work continuously and stably. ?Wide application?--Widely used for Craftsman Blower, Weed Wacker, Nailer, Drill, for Craftsman 4" Grinder and more.