DEWALT XR 20 5 Amp-Hour; Lithium Battery in the Power Tool Batteries & Chargers department at Lowes.com
Amazon.com: JJXNDO for Dewalt 20V to 18V Battery Adapter, 2-Pack DM18D Upgraded Version DCA1820 Converter for Dewalt 18V/20V & for Milwaukee M18 18V Battery to Work for Dewalt 18V Nicad & NiMh
DEWALT 20V MAX Battery Adapter Kit, 18V to 20V, 2 Batteries and Charger Included (DCA2203C) - Amazon.com
DEWALT 18V xRP NiCd Extended Runtime Pack 2.4 Ah Battery (2-Pack) | The Home Depot Canada