The RYOBI 40V HP Brushless 20" Push Mower delivers more power than a 150cc gas mower, making it a true gas replacement. The included 40V 6Ah lithium battery provides up to 45 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. 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. 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 RY401017 40V HP Brushless 20" Push Mower, OP40605 40V 6Ah Lithium Battery, OP408 40V Fast Charger, Grass Catcher Bag, Start Key, Mulch Plug, Side Discharge Chute, and Operator's Manuals.