New in box $200.00 anywhere else there $399.00 so it's a great deal . The 20V MAX* XR POWERPACK™ 8Ah Battery delivers 50% more power and a longer lifespan**. Engineered with tabless cell technology, our best performing 20V MAX* 8Ah 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.