DeWalt's battery packs are strong, durable, and reliable batteries that will add to or replace an existing worn out battery for your DeWalt power tool. The 20V MAX XR 5.0AH battery is a lithium ion battery pack. This will replace any 5.0 AH DeWalt 20V MAX system power tool. It provides a lightweight feedback on the state of its charge and comes with a 3-LED fuel gauge system. Premium XR Lithium Ion batteries provide up to 60% more capacity than a standard 20V MAX battery pack. These battery packs from DeWalt comes as a quantity of 1 and has no memory and virtually no self-discharge for maximum productivity and less down time.