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
Powerextra 4.5Ah 18V DC9096 DC9098 Replacement Battery Compatible with Dewalt 18 Volt XPR Battery DC9099 DW9095 DW9096 DW9098 DE9038 Cordless Power Tools - - Amazon.com
Amazon.com: TenHutt 【with USB】 Replace for Dewalt 18V to 20V Battery Adapter Converter DCA1820 for Dewalt 18V Tools, Convert Dewalt 20V Battery DCB203 DCB205 to Dewalt 18V XRP NiCd NiMh Battery DC9098
DEWALT 18V XRP Ni-Cd Rechargeable Battery with Security Strap for DEWALT 18V Power Tools DC9096S - The Home Depot