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
DEWALT 20-Volt 2-Pack 2 Amp-Hour; 2 Amp-Hour Lithium Power Tool Battery Adapter Kit (Charger Included) in the Power Tool Batteries & Chargers department at Lowes.com