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 18V/20V 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 Conversion for Dewalt 18V/20V batteries: Ni-Cad, DC9096, DC9098, DE9039, DE9095, DW9095, DW9096, DW9098 Usage Use the adapter to power older Dewalt 18V tools with Dewalt 20V Max Lithium Batteries Convert Milwaukee M18 batteries for use with Dewalt 18V/20V tools Charge low-power electronics such as smartphones via the built-in USB port