M18 Red Lithium, High Demand, 9.0 Starter Kit, Red Link Intelligence Provides Optimized Performance & Overload Protection Using Total System Communication Between Tool, Battery & Charger, Long Lasting Performance & Durability, Fuel Gauge Onboard Displays Remaining Runtime For Less Downtime On The Job, All Weather Performance Delivers Fade Free Power In Extreme Jobsite Conditions, Kit Includes: M18 Red Lithium High Demand 9.0 Battery Pack & M18/M12 Rapid Charger.