The Milwaukee M18 FUEL Brushless 4-1/2 in Grinder Kit with 5Ah Battery & Charger. This kit includes (1) 48-59-1850 M18 5Ah Battery & Charger Starter Kit & (1) 2880-20 M18 FUEL Brushless 4-1/2 in Grinder. The MILWAUKEE M18 FUEL 4-1/2" / 5" Grinder Paddle Switch, No Lock is the next advancement in power and performance, generating 11A corded power, fastest cutting, and delivering up to 135 cuts per charge. The M18 FUEL 4-1/2" / 5" Grinder generates 11A corded power allowing completion of the toughest grinding and cutting applications, all on the M18 Cordless System. The POWERSTATE Brushless Motor delivers maximum sustained power and 8,500 RPM to remove material faster and increase productivity. REDLINK PLUS Intelligence ensures unmatched levels of performance, protection, and compatibility. The M18 FUEL 4-1/2" / 5" Grinder includes an electronic clutch for kickback protection, as well as overload protection to maximize motor life.The Milwaukee M18 REDLITHIUM XC5.0 Starter Kit delivers up to 2.5X more runtime, 20% more power and 2X more recharges than standard lithium-ion batteries. The lithium-ion battery pack features superior pack construction, electronics, and performance providing users more work per charge and more work over pack life than any battery on the market. The rechargeable battery also delivers users with 5.0 Amp-hours of runtime. Each battery pack is durably built for heavy-duty use, runs cooler, and performs in climates below 0 degree F/minus 18 degree C. This protection routes water away from the electronics and out of the battery pack, extends the users' battery run-time and life by minimizing heat, and prevents pack failures from vibration or drops. Built-in REDLINK Intelligence protects the battery from overloads, preventing users from damaging their cordless power tools in heavy-duty situations, while the discharge protection prevents cell damage. An integrated temperature Management system and individual cell monitoring help to maximize battery