DEWALT DCB2104 – DEWALT 20V MAX* XR POWERPACK™ 4Ah BatteryThe 20V MAX XR POWERPACK 4Ah Battery deliver 50% more power and a longer lifespan. Engineered with tables cell technology, our best performing 20V MAX 4Ah battery powers through tough jobs, day in and day out. XR POWERPACK batteries are a part of our best performing line of 20V MAX batteries and are compatible with 20V MAX tools. Features 50% more power** tackle tough jobs with 50% more power. Longer lifespan** help maximize longevity day in and day