The RYOBI 18V ONE+ HP Brushless 20" Self-Propelled Multi-Blade Mower delivers more power than a 150cc gas mower, making it a true gas replacement. With (4) included 18V ONE+ 4Ah batteries, this mower provides up to 45 minutes of runtime, making it perfect for lawns up to 1/3 acre. Experience the industry’s best 3-in-1 cutting performance with the CROSS CUT™ Multi-Blade System. This allows for less clumping when mulching, further & more even dispersal when side discharging, and when bagging the fine clippings fill from back to front to maximize space for less bag changes. The brushless motor and advanced electronics automatically react to mowing conditions by increasing the blade speed to eliminate bogging down and powering through the toughest cut. As part of WHISPER SERIES™, this mower is 60% quieter than gas, and even quieter than other cordless mowers, allowing you to mow at any time of day. Equipped with self-propelled rear wheel drive, this mower ensures an effortless, efficient mowing experience. For your utmost convenience, adjust the height of your cut with the 7-position single point height adjustment. When you are finished mowing, easily fold the handles and store vertically for compact storage. Best of all, it is part of the RYOBI 18V ONE+ system where any 18V ONE+ battery works with any 18V ONE+ product. This mower is backed by the RYOBI 3-year manufacturer’s warranty.