Segway Navimow X390
#6 in 1 acre and upFull review
For lawns up to about 2.5 acres that want reliable wire-free mowing with good obstacle avoidance. Skip it for very steep yards, which need an AWD mower.
Navimow $4,499$4,499
The Segway Navimow X390 is the better robot lawn mower overall, rated 4.0 to 3.9. The Segway Navimow X390 leads on navigation and slopes. The Husqvarna Automower 440 iQ wins on warranty and noise. The Husqvarna Automower 440 iQ costs $826.84 less ($3,672.16 vs $4,499).
Husqvarna Automower 440 iQ
#9 in 1 acre and upFull review
For owners of a lawn up to 2 acres who want Husqvarna’s dealer support and a 4-year warranty on a wire-free mower. Camera-based rivals cost less.
Amazon $3,672.16 Husqvarna $4,299.99$3,672.16
Prices were last checked October 21, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the Segway Navimow X390 for navigation (RTK + vision, no boundary wire vs RTK, no boundary wire) and slopes (50% (27°) slopes vs 45% (24°) slopes).
- Choose the Husqvarna Automower 440 iQ for warranty (4-year warranty vs 3-year warranty) and noise (58 dB(A) rated vs 60 dB(A) rated).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every 1 acre and up robot lawn mower; a clear win is highlighted. How we rank explains each one.
| Factor weight | Segway Navimow X390 | Husqvarna Automower 440 iQ |
|---|---|---|
| Overall rating | 4.0/5 | 3.9/5 |
| Value 30% | 79 $1,800 per rated acre | 77 $1,840 per rated acre |
| Navigation 20% | 80 RTK + vision, no boundary wire | 60 RTK, no boundary wire |
| Slopes 20% | 45 50% (27°) slopes | 36 45% (24°) slopes |
| Features 15% | 86 6 of 7; no rain sensor | 86 6 of 7; no rain sensor |
| Warranty 10% | 67 3-year warranty | 100 4-year warranty |
| Noise 5% | 67 60 dB(A) rated | 80 58 dB(A) rated |
Specifications
| Segway Navimow X390 | Husqvarna Automower 440 iQ | |
|---|---|---|
| Coverage | ||
| Lawn size (rated) | 2.5 acres (108,900 sq ft) | 2 acres (87,100 sq ft) |
| Max slope | 50% (27°) | 45% (24°) |
| All-wheel drive | No | No |
| Run time per charge | 4 h | 2 h 18 min |
| Charge time | 1 h 40 min | 54 min |
| Battery | 277 Wh, 21.6 V 12.8 Ah | 18 V 7.5 Ah |
| Navigation | ||
| Navigation | RTK + vision | RTK |
| Boundary wire needed | No | No |
| RTK station | Included | Included |
| Obstacle avoidance | 300° RGB + ToF cameras, 200+ obstacle types, bumper | Radar |
| Multiple zones | Yes | Yes |
| No-go zones | Yes | Yes |
| Cutting | ||
| Cutting width | 9.3 in (237 mm) | 9.4 in (240 mm) |
| Cutting height | 2–4 in (50–100 mm) | 1–4 in (25–100 mm) |
| Height adjustment | In the app | In the app |
| Blades | 6 blades on an anti-clogging cutting disc | 3 pivoting razor blades on a disc |
| Edge mowing | Optional Trimmer accessory (sold separately) for semi-automatic edge trimming | - |
| Smart features | ||
| Connectivity | Wi-Fi, Bluetooth, 4G (5 years of 4G included) | Wi-Fi, Bluetooth, 4G |
| Rain sensor | No | No |
| Anti-theft | - | GPS theft tracking, GeoFence, PIN code, alarm, lift and tilt sensors |
| Build | ||
| Noise (rated) | 60 dB(A) | 58 dB(A) |
| Water resistance | IP66 | IPX5 |
| Weight | 43.9 lb (19.9 kg) | 39 lb (18.6 kg) |
| Warranty | 3 years | 4 years |
| Released | 2025-04 | 2025 |