The 20V MAX* XR POWERPACK™ 4Ah Battery deliver 50% more power and a longer lifespan**. Engineered with tabless 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* tool