Features: The Adapter Compatible with Milwaukee M18 RED Slider Lithium Battery Pack.(Not Compatible with Old V18 Batteries). Only Fits Black & Decker OLD 18v Type Cordless Tools. (WARNING: Not Applicable For Black+Decker 20v Type Tools). Material: ABS 3D Printing + Handmade. Professional Compact Design and Easy Installation. For a long time don't use, please separate from the battery. The adapter doesn't support charging for M18 batteries (please use the original charger) WARNING: Not Applicable For Black+Decker 20v Tools). Not Compatible with Milwaukee Old V18 Batteries (Different PIN Sorting & Size). Make sure that the battery is fully inserted for normal use Please do not force into the battery pack. if the battery pack can not be installed, the installation method may be wrong When you need to charge the battery, remove the converter Package Includes: 1*Adapter (Adapter Only, Battery & Tool Not Included)