DEWALT 20-V 2-Pack 2 Amp-Hour; 2 Amp-Hour Lithium Battery Adapter Kit (Charger Included) in the Power Tool Batteries & Chargers department at Lowes.com
DEWALT Battery Adapter 18V to 20V, For Drills, Sanders and More, Charger Not Included, Bare Tool Only (DCA1820) - Amazon.com