RL850 RoboMower


The Robomow RL850 is an innovative lawn mower that works automatically, so you won’t have to spend another weekend pushing your old gas guzzler around the yard. It mows on its own within a boundary that you outline with a thin wire (included). Once you handle the initial wire setup, this mower does all the work for you–simply press ‘Go’, sit back, relax, and mow!

Product Features

  • Cuts up to 10,800 square feet in a single charge
  • On-board sensor and bumpers to avoid obstacles
  • Grasscycles for a healthier, greener lawn that requires less water
  • Quiet operation means you can mow day or night
  • Rechargeble battery
  • Perimeter switch

Power and Performance

Powered by exclusive drop-and-go 24-volt batteries, the heavy-duty Robomow RL850 is a 53-centimeter, 21-inch mower/mulching system. With its three blades spinning at 5,800 RPM–double the speed of a typical gas mower–the Robomow RL850 travels across your lawn in a crisscross pattern, covering up to 10,800 square feet on a single charge. Easy to set, the Robomow RL850 delivers a 1.75- to 3.25-inch cut with high-cut blades and a 1.0-2.5-inch cut with low-cut blades.

Comfort and Convenience

In addition to its environmental benefits, the Robomow RL850 offers several user-friendly, neighbor-friendly features. First, a user-controlled theft protection system guards the mower from unauthorized use, and a child lock provides peace of mind.

An on-board sensor and bumpers identify obstructions like trees, rocks and obstacles, and truly quiet operation means you can mow your lawn at any hour without disturbing your neighbors.

Grass Collection

The Robomow RL850 doesn’t simply cut your grass–it repurposes the clippings through a patented process called grasscycling. The mower cuts grass into fine clippings and disperses the cuttings over the ground. These clippings quickly decompose and release valuable nutrients and water into the soil, resulting in a better-looking lawn. Grasscycling also leads to a deeper, healthier root system that increases your lawn’s resistance to disease, drought, and insects, and it reduces the amount of water your lawn needs by as much as 85%.


Two-year warranty.

What’s in the Box

Robomow RL850; 500-foot perimeter wire and 200 plastic pegs; sealed batteries and charge pack; 2007 Generation software; instruction manual.

Back to Top