The Milwaukee M18 FUEL 21 in. Self-Propelled Dual Battery Mower Kit meets the performance, durability and ergonomic needs of landscape maintenance professionals. The POWERSTATE Brushless Motor delivers more max torque than 200 cc gas. The advanced electronic package also delivers an instant throttle response on both the lawn mower blade and drive motors to reach full throttle in under 1 second. The mower requires 2 M18 REDLITHIUM Batteries for operation. When paired with the included 2 M18 REDLITHIUM HIGH OUTPUT HD12.0 batteries, the mower delivers up to 60-minutes of runtime for up to 1/2 acre of cutting when removing 1 in. of grass at a 3 MPH self-propelled pace. The Variable Speed Self-Propelled Mower offers speeds between 0-4 MPH and the Active Speed Management Paddles allow users to easily adjust their walking pace while in operation to increase control. The M18 FUEL Mower features a steel deck, 3-in-1 grass management, single point height adjustment, high lift mode, front and side LED lights, vertical storage and 2 deck handles. The Milwaukee 21 in. Mower Blade is designed for use with the Milwaukee M18 FUEL 21 in. Self-Propelled Dual Battery Mower (2823-20). The 21 in. lawn mower blade is a direct replacement for the blade kitted with the M18 FUEL 21 in. Self-Propelled Dual Battery Mower. The steel blade offers users increased durability and longer life. The precision-machined cutting edge delivers an improved cut quality.