1、Through the converter,20V Dewalt lithium battery can be converted into 18V nickel,can be used instead of nickel,Compatible with most DEWALT 18V tools and allows for use of 20V MAX compact batteries. 2、The DCA1820 adapter is designed for use Dewalt 20v MAX XR lithium running older 18V tools. Replace old Dewalt 18V Ni-Cad batteries, DC9096 DC9098 DE9039 DE9095 DE9096 DE9098 DW9095 DW9096 DW9098. 3、The DCA1820 adapter do not work with Dewalt 12V and 20V/60V FLEXVOLT Batteries. This adapter no need to be charged.(Please remove on adapter before charging battery) 4、Advanced technology,using advanced spot welding machine,automatic internal resistance meter,automatic battery sorting. 5、Compatible with Dewalt DCB200 DCB201 DCB203 DCB203BT DCB204 DCB205 DCB206 batteries. Features: Through the converter,20V Dewalt lithium battery can be converted into 18V nickel,can be used instead of nickel,Compatible with most DEWALT 18V tools and allows for use of 20V MAX compact batteries. The DCA1820 adapter is designed for use Dewalt 20v MAX XR lithium running older 18V tools. Replace old Dewalt 18V Ni-Cad batteries, DC9096 DC9098 DE9039 DE9095 DE9096 DE9098 DW9095 DW9096 DW9098. The DCA1820 adapter do not work with Dewalt 12V and 20V/60V FLEXVOLT Batteries. This adapter no need to be charged.(Please remove on adapter before charging battery) Advanced technology,using advanced spot welding machine,automatic internal resistance meter,automatic battery sorting. Compatible with Dewalt DCB200 DCB201 DCB203 DCB203BT DCB204 DCB205 DCB206 batteries. Specifications: Material: Plastic Model: DCA1820 Type: Battery Convertor Adapter Rated Current: 2.5A Ambient Temperature: 25 degrees Compatible for Dewalt 18V/20V lithium batteries Item Size: 106*95*86mm / 4.17*3.74*3.39in Item Weight: 149g / 5.26oz Package Weight: 195g / 6.86oz Package Size: 120*110*90mm / 4.72*4.33*3.54in Package List: 1 * Batery Adapter 1 * User Manual 1 * Batery Adapter 1 * User Manual