DEWALT DC411B 4-1/2-Inch 18-Volt Cordless Cut-Off Tool (Tool Only) - Power Metal Cutting Saws - Amazon.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
18V to 20V Adapter | DEWALT
DEWALT 20V MAX Lithium-Ion Battery Adapter for 18V Tools DCA1820 - The Home Depot