DEWALT 18V to 20V MAX Lithium-Ion Battery Adapter Kit (2 Pack) DCA2203C - The Home Depot
DEWALT 18-Volt 2-Pack 2.4 Amp-Hour; 2.4 Amp-Hour Nickel Cadmium (Nicd) Power Tool Battery Kit in the Power Tool Batteries & Chargers department at Lowes.com
DeWalt XR 18V Battery 4.0Ah | Toolstation
Review: DeWalt Battery Adapter for 18 Volt tools to 20V MAX Batteries — AZ DIY Guy