Quick verdict
The i105N drops the perimeter wire in favour of RTK satellite positioning backed by a camera, and it maps the lawn from your phone in minutes. It is rated for an eighth of an acre, so it suits small city and suburban lawns. Expect some fiddling with antenna placement if trees or buildings block the sky.
Strengths
- No boundary wire; virtual boundaries drawn in the app
- RTK plus vision positioning keeps it on track under light tree cover
- Camera recognises more than 150 types of obstacle
- Up to 12 zones with separate schedules
- Three-year warranty
Weaknesses
- Rated for only 1/8 acre, so larger lawns need the bigger models
- RTK antenna needs clear sky; heavy tree cover can cause positioning drops
- Anti-theft 4G module is an optional extra
The overall YardToolLab Score is out of 100. Section scores are out of 10.
Robot Mowing Without the Wire
The biggest barrier to robot mowers has always been the perimeter wire. Segway’s Navimow i105N removes it. The mower fixes its position using RTK, a satellite technique that corrects normal GPS error down to a few centimetres, and backs that up with a forward-facing camera for the moments when the sky is obstructed. You set the boundary by walking the mower around the lawn once with your phone. Segway rates this model for lawns up to an eighth of an acre.
This review is based on Segway’s documentation and on recurring owner feedback rather than on our own installation.
Setup
Owners consistently describe setup as the i105N’s strongest point. The box includes the charging station, a GNSS antenna kit with mounting options, extension cable and pegs. Once the antenna has a clear view of the sky and the station is powered, you guide the mower around the perimeter from the app and it builds the map. An AI-assisted mapping mode can suggest boundaries automatically. Most people are mowing within an hour, which is a different world from pegging hundreds of feet of wire.
Navigation and Coverage
With a good satellite fix, the mower cuts in planned parallel lines, changes direction between sessions to avoid tracks, and returns to charge before finishing the remaining area. Where the signal weakens, under a tree line or beside a tall wall, the vision system keeps it oriented. The honest picture from owner reports is that light to moderate tree cover is fine, while lawns mostly shaded by dense canopy can suffer positioning drops. Antenna placement matters a great deal, and some owners move it two or three times before finding the best spot.
Obstacles and Safety
The 140 degree camera is trained to recognise more than 150 common garden objects, from toys and hoses to pets, and steers around them rather than relying on a bump sensor. Owners report it handles stationary items well; fast-moving pets are still best kept indoors during mowing, as with any robot. Lift and tilt sensors stop the blades immediately.
Cut Quality
Like other robot mowers, the i105N cuts a little grass every day with small razor blades on a disc, and the lawn settles into an even, dense finish. Edge cutting near fences and walls is the usual limitation, so a string trimmer still has a job once or twice a month.
Ownership
Segway backs the mower with a three-year warranty, longer than most rivals. A PIN and alarm are built in; GPS theft tracking over 4G is an optional module. Blades are inexpensive and easy to swap.
Who Should Buy It
- Small lawns up to an eighth of an acre with reasonably open sky.
- First-time robot owners who want setup measured in minutes, not weekends.
- Multi-zone gardens such as front and back lawns joined by a path.
Larger lawns should look at the higher-capacity Navimow models, and heavily wooded plots may still be better served by a wired robot.
Alternatives to Consider
Segway’s larger i108N and H series models use the same navigation for bigger lawns. The Worx WR342 adds four-wheel drive for sloped gardens. Buyers with heavy tree cover who want proven reliability may still be better served by a wired Husqvarna Automower 310 or 315 Mark II, which does not depend on satellite signal at all.
Verdict
The Navimow i105N makes robot mowing genuinely approachable for small lawns. Setup is quick, navigation is reliable with a clear sky, and the warranty is generous. Check your lawn for sky view before buying, because that single factor decides whether this is a delight or a frustration.
Full specifications
Segway Navimow i105N FAQs
It uses RTK, a satellite positioning method accurate to a few centimetres, with a fixed antenna as the reference. You drive the mower around the edge once with your phone to record the boundary.
When satellite signal weakens, the camera-based vision system takes over to keep the mower oriented. Dense canopy over most of the lawn is still the hardest case for this class of mower.
Yes. You can define up to 12 zones, each with its own schedule and mowing direction, and connect them with pathways.
The mower has a PIN and alarm. GPS tracking over 4G requires an optional add-on module.
