Robotic mower r80li does the mowing for you,: it mows the lawn on its own, while you enjoy your free time. Thanks to its free & natural movement, the r80li mows a lawn area up to a maximum of 800 square meters (8611 sq.Ft) effectively, reliably without wheel nuts. The robotic mower recharges itself at the charging station. It cuts grass tips with razor sharp blades, grass clippings remain on the lawn as a natural fertilizer. Powerful 18V/1.6Ah rechargeable lithium ion battery