REDLINK intelligence. Provides optimised performance and over load protection. Best in class construction. Offers long lasting performance and durability. Fuel gauge on board. Displays remaining run time for less down time on the job. All weather performance. Delivers fade free power in extreme jobsite conditions. 2.5X more run time. 20% more power than a standard 18V lithium battery. 2X more life than a standard 18V lithium battery. Compatible with 60+ tools in the Milwaukee® range.