DEWALT 20V MAX Cordless 1/4 in. Impact Driver, (2) 20V 4.0Ah Batteries, Charger, and Bag DCF885M2 - The Home Depot
Dewalt x 2 DCB182 18V 4Ah XR Li-Ion Battery (Pack of 2), 18 V : Amazon.co.uk: DIY & Tools
Amazon.com: Synergy Digital Power Tool Battery, Compatible with DeWalt DCF620 Power Tool, (Li-Ion, 20V, 2600 mAh) Ultra High Capacity, Replacement for DeWalt DCB182 Battery : Tools & Home Improvement
DeWalt 4.0Ah DCB204 vs DCB182 Battery Packs - Pro Tool Reviews