The world's first cordless grinder delivers the power of a corded grinder with up to 5X more run time and up to 10X longer motor life.The M18 FUEL 4-1/2 in / 5 in Grinder supplies maximum sustained power to complete the toughest grinding, surface preparation and cutting applications. The POWERSTATE Brushless Motor provides up to 10X longer motor life and lower cost of ownership. The M18 REDLITHIUM HIGH DEMAND 9.0 Battery Pack delivers up to 5X more run-time, 35 Percent more power, and runs 60 Percent cooler than standard 18V lithium-ion batteries. It maintains full power and runs substantially cooler through heavy applications, allowing users to push their cordless tools harder and longer than ever before. The M18 REDLITHIUM HIGH DEMAND 9.0 battery is fully compatible with 100+ M18 tools. The grinder features REDLINK PLUS Intelligence, the most advanced system of cordless power tool electronics, for maximumperformance. A Rapid Stop Brake feature stops accessories in under 2 seconds. The 18-volt lithium-ion grinder's thin body design gives it optimized balance to rest easily in your hands. Tool-free accessory changes using the FIXTEC nut and guard adjustments mean less downtime during work. The grinder is built with the same tool body, gearing system and anti-vibration side handle as Milwaukee's legendary high-performance corded grinders for maximum durability on the job. The kit includes 2 M18 REDLITHIUM HIGH DEMAND Battery Packs, a multi-voltage charger and carrying case. Grinding wheel sold separately. INCLUDES: (1) M18 FUEL 4-1/2 in / 5 in Braking Grinder (Tool Only) (2783-20), (2) M18 REDLITHIUM HIGH DEMAND 9.0 Battery Pack (48-11-1890) , (1) M18 & M12 Rapid Charger (48-59-1808) , (1) T27 Guard , (1) Flange Nut , (1) FIXTEC Nut