DEWALT XR 20-Volt 2-Pack 5 Amp-Hour; 5 Amp-Hour Lithium Power Tool Battery Kit (Charger Included) in the Power Tool Batteries & Chargers department at Lowes.com
DEWALT 20V MAX XR Premium Lithium-Ion 4.0Ah Battery Pack DCB204 - The Home Depot
DEWALT 20V MAX Battery, 2 Ah and 4 Ah, 4-Pack, Fuel Gauge LED Charge Indicators(DCB324-4) - - Amazon.com