Description Power your 20V MAX tools with (2) lightweight 20V MAX XR 4Ah batteries that feature a portable design and a 3-LED Fuel Gauge System for immediate feedback on your state of charge.Individual pack weights 1.42 lbs allowing user maximum run-time in a lightweight batteryXR Lithium Ion pack provides up to 33% more capacity than standard 20V MAX* battery packs3-LED fuel gauge system allows immediate feedback on state of chargeNo memory and virtually no self-discharge for maximum productivity and less downtime