Powered by FUEL technology, the M18 FUEL 1-1/8 in. SDS plus rotary hammer delivers faster than corded speed, corded durability, and all day work on one charge. The Milwaukee POWERSTATEbrushless motor provides 3.3 ft-lbs of impact energy, 0-1, 350 RPM and 0-5,000 BPM. The Milwaukee REDLITHIUM XC 4.0 battery packs provide all day work on one charge, 20% more power and 2X more recharges than standard lithium-ion batteries. REDLITHIUM SDS-Plus intelligence integrates full-circle communication between tool, battery and charger to protect from overloading, overheating, and over-discharging.