General description This 20V DCA1820 Battery Adapter allows you to use 20V lithium Dewalt batteries with older 18V Dewalt tools. It effectively converts the 20V lithium battery to be compatible with 18V nickel batteries, making it a versatile solution for users of Dewalt tools. Technical specifications Material: Plastic Model: DCA1820 Type: Battery Converter Adapter Rated current: 2.5A Ambient temperature: 25 degrees Item size: 106*95*86mm / 4.17*3.74*3.39 in Item weight: 149g / 5.26oz Package weight: 195g / 6.86oz Package size: 120*110*90mm / 4.72*4.33*3.54 in Compatibility and accessories Compatible with most 18V Dewalt tools Replaces old Dewalt 18V Ni-Cad batteries: DC9096, DC9098, DE9039, DE9095, DE9096, DE9098, DW9095, DW9096, DW9098 Compatible with Dewalt batteries: DCB200, DCB201, DCB203, DCB203BT, DCB204, DCB205, DCB206 Usage This adapter does not need to be charged; please remove the adapter before charging the battery. Designed for use with older 18V Dewalt 20V MAX XR