DEWALT 20-Volt Max 2-Pack 2 Amp-Hour Lithium Power Tool Battery Adapter Kit (Charger Included) in the Power Tool Batteries & Chargers department at Lowes.com
DEWALT 18V to 20V Battery Adapter Kit (DCA2203C) & 18v to 20v Adapter - Bare (DCA1820),Yellow/Black - - Amazon.com
18V to 20V Adapter | DEWALT
Power Wheels Adapter Fit for Dewalt 18/20V Battery, EEEkit Battery Adapter for RC, Toy, Truck, 12 Gauge Robotics, DIY Power Source Converter with Fixing Holes - Walmart.com