Add versatility to your toolbox with the DEWALT DCA1820 20-Volt MAX to 18-Volt tool adapter. This adapter allows you to use selected DEWALT 20-Volt MAX Lithium Ion slide pack batteries with DEWALT 18-Volt power tools. Now you don't have to compromise when it comes to battery packs or buy duplicate tools.. Compatible with most DEWALT 18-Volt tools. Allows for use of 20-Volt MAX compact batteries in most DEWALT 18-Volt tools. Requires use of DEWALT 20-Volt MAX charger. Adapter will not fit into DEWALT 18-Volt chargers. Battery and charger are sold separately. Do not use adapter with premium batteries (DCB200, DCB204, DCB204BT, DCB205) in 18-Volt compact drills DC970, DC759. Use with DCB201, DCB203, DCB203BT compact batteries. . . Battery Amp Hours: 0.0. Voltage (volts): 20 V. Number of Total Batteries Included: 0. Power Tool Accessory Type: Battery. Battery Power Type: Lithium Ion.