DEWALT 20 4 Amp-Hour; Lithium Battery Kit (Charger Included) in the Power Tool Batteries & Chargers department at Lowes.com
DEWALT 20V MAX Battery, Lithium Ion, 2 Ah and 4 Ah, 4-Pack, Fuel Gauge LED Charge Indicators (DCB324-4) - Amazon.com
DeWALT Max XR Lithium-Ion 20V 4Ah Battery DCB204 - Walmart.com
DEWALT 20V MAX 125 MPH 450 CFM Cordless Battery Powered Handheld Leaf Blower Kit with 6Ah and 4Ah Batteries, Charger and Bag DCBL722BDCB246K - The Home Depot