Review: DeWalt Battery Adapter for 18 Volt tools to 20V MAX Batteries — AZ DIY Guy
DeWALT DCA1820 18V to 20V Lithium-Ion Battery Adapter for 18-Volt Tools
18V XRP™ Battery Pack | DEWALT
DeWALT® DWDCA2203C - 20 V Li-ion 2.0 Ah Battery and Wall Battery Charger with Battery Adapter - TOOLSiD.com
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
Use a 20V Battery on Your 18V DeWalt Tools With This Handy Adapter — Construction Junkie