Fangrui Product Details [function]dw18ml Battery Adapter Allows You Use Of The 20v Max Lithium Batteries And Enables The M-18 18v Tool To Work Well. (battery Not Included, Adapter Only). [compatibility]this Dw18ml Convert Adapter Top Port For M-18 18v Cordless Power Tools. Convert Adapter Bottom Port For 20v Max Lithium Batteries, To For 18v Lithium Batteries. [easy To Use]the Adapter Is Easy To Install And Remove. [notice]this Adapter Cannot Be Used For Battery Charging. Please Remove Adapter Before Charging Battery. [safety Reliability]safe Desigh, Abs High Quality Material. All Adapter Comply With Ce, Fcc And Rohs Testing Standards. Material: Plastic Colour: Black Package Contents: 1 X Adapter Only The Above Package Content, Other Products Are Not Included. Note: Light Reflection And Different Displays May Cause The Color Of The Item In The Picture A Little Different From The Real Thing. The Measurement Allowed Error Is +/- 1-3cm.