Power your 20V MAX tools with this 20V MAX 2Ah Battery that features the runtime and performance needed for tough jobs, along with the 20V MAX XR POWERPACK 4Ah Battery that delivers 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. Both batteries are compatible with 20V MAX tools.