The Milwaukee M18 18V Lithium Battery Convert To A Dewalt 18V/ 20V Max Xr ?Using Tips Notes?: 1. Can NOT fit into any chargers when adapter with battery, Can NOT be used for power tool battery charging, If you need to charge your battery, please use the original brand battery chargers; 2. Please remove it from the battery when not in use, Safe to use; 3. The product color is all black or yellow, does not affect the use, random delivery. ?Adapter Converter Function?: This battery adapter only can compatible with Milwaukee M18 18V lithium slide battery to make them apply to DeWalt 18V/20v Max lithium-Ion cordless tools. Let you enjoy the benefits of extended lithium ion battery operation time on existing 20V tools instruments. Perfect replacement for DeWalt 18V/20V MAX XR Lithium Li-ion Battery. ?Applicable Battery Models?: The bottom of 20V adapter can compatible with Milwaukee M18 18V lithium ion battery: M18 48-11-1811 48-11-1815 48-11-1820 48-11-1822 48-11-1828 48-11-1840 48-11-1841 48-11-1850 48-11-1852 48-11-1860 48-11-1890 48-59-181 48-59-1850 etc. ?Replacement for Dewalt 18V/20V Battery?: The top of this adapter can compatible with Dewalt DCB series 18V/20V MAX XR lithium battery power tools; Replacement for Dewalt 18V/ 20V MAX XR Lithium Ion battery, DCB180 DCB181 DCB182 DCB200 DCB201 DCB203 DCB204 DCB205 DCB206 DCB609 DCB606 etc. ?Durable and Convenient?: The M18 battery adapter is made of high quality ABS+PC material, solid and durable. Professional compact design and easy installation. Small size(4.33"x2.75"x1.89"), easy to carry and store, convenient to use and with good performance. (Maximum initial battery voltage is 20volts, Nominal voltage is 18volts.)