General description This DM18D DCA1820 Battery Adapter allows you to use Dewalt 20V Max Lithium Batteries with older Dewalt 18V tools and Milwaukee M18 batteries. It is compatible with Dewalt NiCad and NiMh battery tools, providing a versatile solution for your power needs. Technical specifications Compatible with Dewalt Lithium-Ion Batteries: DCB200, DCB201, DCB203, DCB203BT, DCB205, DCB206 Compatible with Milwaukee M18 Lithium-Ion Batteries: M18 48-11-1852, 48-11-1840, 48-11-1815, 48-11-1820 Usage Convert Dewalt 20V Max Lithium Battery for use with Dewalt 18V tools Convert Milwaukee M18 battery to Dewalt 18V/20V batteries Charge low-power electronics such as smartphones using the built-in USB port