Amazon.com: for Dewalt 20V to 18V Battery Adapter, JJXNDO 2-Pack DM18D Upgraded Version DCA1820 Converter for Dewalt 18V/20V & for Milwaukee M18 18V Battery to Work for Dewalt 18V Nicad & NiMh
DEWALT DE9130 18V, 12V, 14.4V &18V Ni-Cd & Ni-MH / 30 Min. Fast Battery Charger | eBay