The 20V MAX XR POWERSTACK 5Ah delivers 50% more power** and a longer lifespan**. Engineered with pouch cell technology, DeWALT's best performing 20V MAX 5Ah battery† powers through tough jobs, day in and day out. XR POWERSTACK™ batteries are a part of the best performing line of 20V MAX batteries and are compatible with 20V MAX* tools.