The M18 FUEL Drywall Screw Gun is Faster than corded, features auto start functionality and delivers up to 3X longer run time than other cordless competitors. The POWERSTATE Brushless motor spins at 4,500 RPM's resulting in faster productivity. with REDLINK PLUS Intelligence, Milwaukee's auto start feature automatically starts the motor on contact with drywall providing less noise between screws and 3X longer run time. REDLITHIUM 5.0Ah batteries the drywall gun delivers up to an industry leading 64 sheets on one charge. The M18 FUEL Drywall Screw Gun delivers the balance and weight desired by professionals for all day use. Delivers up to 2X more runtime, 20% more power and 2X more recharges than standard lithium-ion batteries. The Milwaukee 48-11-1820 M18 REDLITHIUM 2.0 Compact Battery Pack features superior pack construction, electronics and performance to deliver more work per charge and more work over pack life than any battery on the market. It offers 2.0 Amp-hours of runtime. with Milwaukee durability built into each pack, this battery runs cooler and performs in climates below 0 degree F/minus 18 degree C.