DEWALT 20-V 2-Pack 2 Amp-Hour; 2 Amp-Hour Lithium Battery Adapter Kit (Charger Included) in the Power Tool Batteries & Chargers department at Lowes.com
DEWALT 20V MAX Battery Adapter Kit, 18V to 20V, 2 Batteries and Charger Included (DCA2203C) - Amazon.com
DEWALT 18-Volt to 20-Volt MAX Lithium-Ion Battery Adapter Kit (2-Pack) and 20-Volt MAX Compact Lithium-Ion 4.0Ah Battery Pack DCA2203CWDCB240 - The Home Depot
Battery Adapter for Dewalt Battery, Power Wheel Adapter for Dewalt 20v Battery,Power Wheels Battery Conversion Kit with Fuse and 14 Gauge Wire Connector for Ride On Truck, Robotics, Rc Toys - Amazon.com