
Greenworks 40V 4.0Ah 21-in. BL (Smart Pace) Self Propelled Mower with (2) USB batteries and (1) charger included. The Greenworks 40V Lithium-Ion platform powers over 40 outdoor products, including lawn mowers, leaf blowers, string trimmers, chainsaws, hedge trimmers and much more! Our 40V lithium-ion batteries provides the power you need, and deliver fade-free power with no memory loss after charging
Q: Does this lawnmower have a key!
A: Hello Dolly - This unit does not use/need a key to start.
A: Hello Jeffmcd - When it comes to the comparison of our voltage lines, the higher the voltage, the more power the motor has. With that said, the 80V saw would be more powerful. However, the higher the ampere-hour (Ah) rating is on a battery, the longer the run time will be. This means that while the 80V saw is more powerful, the 60V saw would have a longer run time as it comes with a higher Ah battery. However, both are more than suitable for residential use.