Amazon.com: Alian Dewolt 18 Volt to 20 Volt Adapter,Dewolt 20v Battery Adapter kit for 18v Battery,for Dewal 18V Old Power Tool,USB Charger Adaptor,Orangeyellow(2 Packs) : Tools & Home Improvement
Review of 18 Volt to 20 Volt Battery Adapters for Dewalt 18 Volt Drills and other power tools. - YouTube
Review: DeWalt Battery Adapter for 18 Volt tools to 20V MAX Batteries — AZ DIY Guy
DEWALT 20-V Lithium Battery Adapter in the Power Tool Batteries & Chargers department at Lowes.com
18V-20V Adapter/Battery Combo Kit by DEWALT at Fleet Farm
Amazon.com: Rocivic 18V to 20V Battery Adapter DCA1820, Convert Dewalt 20 Volt Lithium Ion Battery DCB206 DCB201 to Dewalt 18 Volt NiCad NiMh Battery DC9096 DW9096 DC9098, with USB Port : Tools
DEWALT 18-Volt to 20-Volt MAX Lithium-Ion Battery Adapter Kit (2-Pack) and 20-Volt MAX Compact Lithium-Ion 4.0Ah Battery Pack DCA2203CWDCB240 - The Home Depot