Product review · reviewed 31 July 2026
Lefant M3 Max: our review
The highest power in this comparison and 220 minutes of runtime, at a price well below the established brands. The trade-off lies in the software finish and the after-sales unknown.
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Who it's for
- A medium to large home, for someone who wants to maximise power and runtime per euro spent and accepts a less polished app.
Who it's not for
- Anyone who wants the peace of mind of an established brand with proven after-sales service and a mature accessories ecosystem.
Power per euro spent
20,000 Pa claimedC: the highest figure in our comparison, above the Dreame L40s Pro Ultra, at a noticeably lower price. Add 220 minutes of runtimeC — the second-best figure on this page — and the features-to-price ratio becomes hard to match. Still, keep some perspective: above 5,000 Pa, the difference is only felt on carpets. Between 19,000 and 20,000 Pa, no user will tell the difference in practiceE. What really matters here is that nothing was sacrificed to hit the price.
Navigation: two systems instead of one
The M3 Max combines a 360° dToF laser with a 15-metre range and a network of PSD sensors covering 190°C. The first maps and localises, even in low light; the second detects obstacles over a wide angle. Multi-floor mapping automatically recognises levelsC, which avoids re-mapping every time the robot moves. It's solid mid-range equipment — not the fine object recognition of a Roborock, but well above a gyroscopic-navigation robot.
The dock and maintenance
Hot sterilisation at 45 °C is claimed to eliminate 99% of bacteria, followed by two hours of cool-air drying to preserve the mop fibresC. The 3.5 L bin is rated for about eight weeksC. The dual rotating mop spins at 200 rpmC: that's the system that actually tackles dried-on stains, where a vibrating mop only wets the surface. In an open kitchen, the difference is clear.
What should give you pause
Software finish is the acknowledged weak point: an app less accomplished than Dreame's or Roborock's, basic object recognitionA. Concretely, the robot will avoid a cable or sock on the floor less well. The second point is more structural: Lefant is a less established brand, and parts availability in three or four years remains an unknownA. It's the bet to accept in exchange for the price gap.
Specifications
The spec sheet, source by source
| Specification | Value |
|---|---|
| Suction C | 20,000 Pa |
| Claimed runtime C | 220 min |
| Navigation C | 360° dToF laser (15 m range) + 190° PSD sensors |
| Mop C | Dual rotating, 200 rpm |
| Dock C | Sterilisation at 45 °C, 2 h drying, 3.5 L bin |
| Bin capacity C | 3.5 L, about 8 claimed weeks |
| Mapping C | Multi-floor, automatic level recognition |
| Safety C | Anti-drop, anti-collision, anti-jamming |
| Weight C | 6.67 kg |
C Manufacturer data · A Synthesis of public reviews · E Editorial estimate. No Amazon rating or review count is reproduced on this site.
Its place in the ranking
Where it stands against the others
We gave this model a score of 8.5/10, which places it at rank #2 in our comparison. The weighting used — suction 25%, runtime 20%, reliability 20%, mopping 15%, app 10%, cost of ownership 10% — is published in full.
Frequently asked questions
About the Lefant M3 Max
Is 20,000 Pa really better than 19,000?
No, not in practice. Above about 5,000 Pa on hard floors, the gain becomes marginal, and the difference between 19,000 and 20,000 Pa is imperceptible. The figure mainly shows that the model plays in the premium league.
Is the app really a problem?
It gets the job done — scheduling, zones, multi-floor maps — but it's less polished than Dreame's or Roborock's, and object recognition is basic. If cables or toys often lie around, a camera-equipped model will be more hassle-free.
220 minutes of runtime, for what floor area?
It comfortably covers a large flat or a house in a single cycle. Bear in mind that the claimed runtime corresponds to the most economical mode: at maximum suction, expect noticeably less.
How good are after-sales service and spare parts?
That's the main unknown. Lefant is less established in France than Dreame or Roborock, and we don't have enough hindsight on long-term parts availability. Weigh it against the price difference.