DeWALT® DWDCA2203C - 20 V Li-ion 2.0 Ah Battery and Wall Battery Charger with Battery Adapter - TOOLSiD.com
DEWALT 20V MAX Battery Adapter Kit, 18V to 20V, 2 Batteries and Charger Included (DCA2203C) - Amazon.com
Battery Adapter For Black&Decker for Porter Cable 20V to For Dewalt 18V tools | eBay
Amazon.com: JJXNDO 1-Pack DM18D Upgraded Version DCA1820 Converter for Dewalt 18V/20V & for Milwaukee M18 18V Battery to Work for Dewalt 18V Nicad&NiMh Battery Tool(Convert Lithium Battery to Nicad/Nimh Battery) : Tools
Replacement Adapter for Dewalt 18V 20V / for Milwaukee 18V Li-ion Battery Converted To for Dewalt 18V Ni-Cd Ni-Mh Battery DC9096 - AliExpress