DEWALT 20V Max XR 20V Battery, 5.0-Ah, 2-Pack (DCB205-2)Premium XR Lithium Ion pack provides up to 60% more capacity than standard DEWALT 20V MAX battery pack (DCB200)3-LED fuel gauge system of DEWALT battery allows immediate feedback on state of chargeNo memory and virtually no self-discharge for maximum productivity and less downtimeLightweight at 1.4 lbs and compatible with entire line of 20V MAX tools