Roborock RockMow X115H vs Segway Navimow X450

For a large, sloped property the Segway Navimow X450 wins this robot lawn mower comparison easily, on coverage, deck width and edge trimming. The Roborock RockMow X115H is the better value for a third-of-an-acre garden, where its lower price, longer runtime and fast recharge are enough.

Scale. The Roborock RockMow X115H is rated for about three eighths of an acre on a 9.4 in deck, while the Segway Navimow X450 is rated for about an acre and a half on a 17 in twin-disc deck rated at 607 m²/h.

The Roborock RockMow X115H does, because it navigates with full-band RTK and four cameras and needs its reference station to see the sky. The Segway Navimow X450 uses network RTK delivered over its built-in 4G instead, so no antenna has to be planted.

The Segway Navimow X450, with factory EdgeSense trimming. The Roborock RockMow X115H can only trim edges with the PreciEdge module, which is sold separately and reaches within 1.2 in of a boundary.

The Roborock RockMow X115H runs about 120 minutes on a 6 Ah pack that is not owner-swappable and recharges in about 60 minutes. The Segway Navimow X450 runs about 110 minutes on a swappable 12.8 Ah pack with a 90 minute recharge.

Buy the Segway Navimow X450 for a large, sloped property that needs coverage, low cutting and edge trimming plus a swappable battery. Buy the Roborock RockMow X115H for a third-of-an-acre garden on a budget with a clear sky view.