Amazon offers the DeWalt 20-volt Max Premium XR Li-Ion Battery 2-Pack, model no. DCB204-2, for $117.99. Proceed to final checkout to see the price drop to $97.99. With free shipping, that's the lowest total price we could find by $27. It features a 3-LED fuel gauge system and is compatible with the entire line of DeWalt 20-volt MAX tools.