M18 REDLITHIUM High Demand battery pack delivers more run-time, more power, and runs cooler than standard 18V lithium-ion batteries. Battery is best optimized for high draw products and sustained run-time applications. REDLINK Intelligence provides optimized performance and overload protection using total system communication between tool, battery and charger. Maintains full power and runs substantially cooler through heavy applications. Onboard fuel gauge displays remaining run time for less down time on the job. Battery is fully compatible with M18 tools.