The RYOBI 40V HP Brushless 21" Push Mower Kit delivers more power than a 163cc gas mower, making it a true gas replacement. The included 40V 8Ah battery provides up to 55 minutes of runtime, making it ideal for up to 1/2 acre. 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. The CUT COMMAND CENTER™ helps you monitor runtime and blade life & activate turbo mode and lights right at your fingertips. Achieve an extra boost to power through tough grass with the turbo mode. This mower is equipped with a single-point height adjustment allowing you to easily select the perfect height for your lawn. When you’ve finished mowing, simply fold the handles and store vertically for compact storage in tight spaces. The 21” durable composite deck is lightweight, resists corrosion, and is covered by a lifetime warranty. Best of all, it is part of the RYOBI 40V system where any 40V battery works with any 40V product. This mower is backed by the RYOBI 5-Year Manufacturer's Tool Warranty, 3-Year Manufacturer’s Battery Warranty, and includes RY40HPLM05 40V HP Brushless 21" Push Mower, OP4080A 40V 8Ah Battery, OP408 40V Fast Charger, Grass Catcher Bag, Start Key, Side Discharge Chute, and Operator's Manuals.