Robomow RX20 Battery Powered Robot Mower Review

8Expert Score
An Ideal Robotic Mower For Small Lawns

A Robotic Lawn Mower Meant to Manicure Small Suburban Lawns

  • Designed for small lawns
  • Easy set up
  • Rain sensor
  • Alexa voice enabled
  • Intuitive control apps
  • Not meant for larger lawns
  • Price is a little high
  • Only 1-year warranty

People with small lawns are often tasked with trying to track down the right battery or corded electric lawn mower that is convenient enough to lug around the yard. Though this still tends to eat up time, and you might still need to pull out the string trimmer afterward.

If your time is precious, or perhaps you have mobility issues that limit your ability to operate a traditional push mower, the Robomow RX20 might be the best robotic lawn mower for your yard. It was specifically designed with the kind of easy use and maximum control you need to conveniently maintain your lawn, as well as state-of-the-art safety and security features.

The safety and security features built into the Robomow RX20 even includes a special rain sensor that quickly returns the unit to the safety of the charging station when even a small amount of precipitation is detected. The whole system relies on

It’s even compatible with the Alexa smart home ecosystem. You can also set it up via a smart phone app or web app. The total set up from the moment you open the box to the point where it’s ready to mow for the first time is typically less than one hour.

The Robomow RX20 is perfect for a lawn of around 180 to 200 square feet though it can certainly handle more than that. This size and it’s normal mowing frequency will maintain a neatly manicured lawn. It also produces tiny grass clippings that will decompose back into the upper layers of the turf. Not only does this help feed vital nitrogen back into your lawn, but it also prevents thatch buildup, which reduces the need for fall or spring aerating. It’s a great win-win mowing strategy for small lawns.

The Robomow RX20 has a 7-inch cutting path, and has a “Mow Beyond the Wheel” engineering principles that lets it cut very tightly up to trees or complex landscaping features. With a lot of yards this eliminates the need for string trimming. The wheels also have the traction and torque to travel over a slope of up to 8.5-degrees.

The Robomow RX20 is backed by a 1-year warranty as well as a 30-day guarantee.

Key Features

  • Designed to maintain a small lawn
  • 7-inch cutting path
  • Tight cutting for virtually no trimming
  • Compatible with Alexa voice-activated ecosystem
  • Smartphone & web apps available
  • Less than 1-hour set up
  • Rain sensor
  • Anti-theft system
  • 1-year warranty


The Robomow RX20 was truly designed to be a dynamo at maintaining small lawns of 180 to 200 square feet. If necessary, it can even cut to parameters of two different zones, which is nice if your front and back yard have different lawn care needs. It can even handle an incline of up to 8.5-degrees.

Ease Of Use

Just like a lot of robotic lawn mowers, the Robomow RX20 does need a little set up before you can set it loose to cut the grass. Though it is arguably easier than a lot of the closest competitors. It comes with everything you need and for most people it can be 100% set up and ready to mow in less than an hour.

You also will appreciate the connectivity and interactive level of control. It was designed to be voice activated via Amazon’s Alexa ecosystem. Even if you don’t use Alexa, it comes with other voice controls via a smartphone and web app that was designed for intuitive operation.

Special Features

The Alexa ecosystem compatibility, web app and smartphone app make it easy to operate and control the Robomow RX20. The rain sensor that returns it to the safety of the charging station is also nice if you happen to be away from home, or simply not paying attention to the weather when a stray shower strikes.

The Robomow RX20 was designed to closely cut around trees and landscaping features with a special cut just behind the wheel engineering feature. The frequent cutting strategy it employs also does a great job of minimizing that problems, which is handy for reducing aeration needs as well as helping to feed nitrogen back to your lawn.

The entire system needs a valid pass code to engage the mower’s on-board parameters. This works as a highly effective anti-theft system. The entire Robomow RX20 is backed by a 1-year warranty as well as a 30-day guarantee.

Cut Quality & Options

The Robomow RX20 has a 7-inch cutting path and cuts tightly right up to the wheels. It can also be set up to cut two different zones, which is handy for maintaining a front and back yard with different cutting requirements.

The frequent mowing scheme that the Robomow RX20 uses not only helps to maintain a neatly manicured lawn, but it also tends to produce very tiny grass clippings. These in-turn decompose quickly to feed a little bit of nitrogen to the turf, which helps to naturally fertilize the grass in prime growing season. It also helps to prevent the harvested grass clippings from drying out into thatch that can gradually block water absorption and choke out your lawn.


The Robomow RX20 was engineered to need minimal maintenance. After the initial set up of an hour or so, this robotic lawn mower will do a good job of taking care of itself. It will return to the charging station as needed and even returns to safety if precipitation activates the rain sensor.

From time to time, the cutting blades will need to be replaced. Though this is par for the course with all robotic lawn mowers. It takes little time and the replacement cutting blades are inexpensive.

Safety Features

The Robomow RX20 was designed with the normal suite of safety features that you find with most robotic lawn mowers. You also have to like the rain sensor’s ability to protect the unit from precipitation as well as the anti-theft validation code.


If you have a small lawn, and you don’t have the time to maintain it or the mobility to comfortably cut it on your own, then the Robomow RX20 might be the most energy efficient robotic mower for you. It maintains a tightly manicured lawn that virtually eliminates the need for string trimming. The tiny grass clippings it produces also help feed the underlying turf soil and even reduces the need for seasonal aeration.

Robomow RX20 Battery Powered Robot Mower Review
Robomow RX20 Battery Powered Robot Mower Review
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