The Neuton CE 6 Mower is a rechargeable battery-powered lawn mower for the garden. Rather than using a petroleum-based fuel, the mower just uses batteries. A single charge of the 360kWh battery is enough to mow up to 15,000 sq. ft. or 1/3 acre of grass.
Theoretically, you could use solar panels to charge these batteries to be completely eco-friendly, but if it takes 12 hours to charge a battery via the mains, then it would probably take 20 to 30 hours to charge via a large solar panel.
The internal rechargeable battery can be charged in about 12 hours, and supposedly cost just 10 cents per full charge. The manufacturers also claim that the battery is 95% recyclable (why not 100%?) and will last up to 5 years with proper care. A spare battery will cost you around $100. The mower itself, which comes with a battery and charge will cost you the best part of $500.
Since the lawn mower is not directly connected to the mains, its ideal for people with large or remote gardens. I can’t imagine professional gardeners using one though, as they’d get through 10 batteries a day!
Source: Coolest-Gadgets