Dewalt 18v xr = 20v xr max, WATCH this before you buy — Mellif Tools
Review: DeWalt Battery Adapter for 18 Volt tools to 20V MAX Batteries — AZ DIY Guy
DEWALT 20 Volt MAX XR Lithium-Ion 5.0 Ah Premium Tool Battery - Power Townsend Company
Review: DeWalt Battery Adapter for 18 Volt tools to 20V MAX Batteries — AZ DIY Guy
DeWalt Battery Adapter to Craftsman – Power Tools Adapters
DEWALT 18 Volt to 20 Volt MAX Battery Adapter Combo Kit - Farr's Hardware
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 20-V Lithium Battery (2 Ah) in the Power Tool Batteries & Chargers department at Lowes.com
20V Battery Adapter DCA1820 for Dewalt 18V Tools Convert All Dewalt Lithium Battery Convertor yellow-new - Walmart.com