Woot offers Dewalt DCB2108 20V MAX XR POWERSTACK 8.0Ah Battery for $89.99 (orig. $199). Free shipping for Prime Members.

Product Description:
The 20V MAX XR POWERPACK 8Ah Battery delivers 50% more power and a longer lifespan. Engineered with tables 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.

• 50% more power - tackle tough jobs with 50% more power
• Longer lifespan - help maximize longevity day in and day out with this battery that delivers longer life than traditional cylindrical batteries
• Resists wear-and-tear: take on the elements with a durable, overmolded base designed to provide a high level of impact resistance
• State-of-charge: get quick visibility to your battery's state-of-charge with the LED indicator to help avoid interruptions
• Part of our best performing line of 20V max batteries: these XR batteries are compatible with 20V max tools and chargers