Robot Vacuum H40
2 independent reviewsRead the findings →One of Xiaomi's cheapest robots with laser mapping and a self-emptying dock. It's good for routine vacuuming of tidy, mostly hard floors. Its mop only wipes lightly, and small objects like cables and socks trip it up.
See the alternatives below, or switch market.
Where it sits in Xiaomi’s range
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What reviewers found
Two French home tests: Frandroid, and Presse-citron over two months. Both found it vacuumed dust and crumbs well on hard floors, both called the mop more of a damp wipe than a real clean, and both saw small objects like cables and socks get past its sensors. Presse-citron also had to fix the first map by hand, and Frandroid found the app took too many taps for simple jobs.
Frandroid, hands-on, Aug 2025 · Presse-citron, hands-on, 2 months at home, Sept 2025
Hard floors
Mixed resultsPresse-citron found it convincing on hard floors, clearing dust and crumbs and pulling dirt from corners. Frandroid found one pass left bits behind because the side brush flicked them away, though a second, crossways pass cleared everything.
Carpet and rugs
Mixed resultsFine on thin rugs, weak on thick ones. Presse-citron found it convincing on very thin rugs, and Frandroid found it copes with thin carpet but only surface-cleans thick or long-pile rugs.
Pet hair
Mixed resultsPresse-citron found it picked up hair well from hard floors, but Frandroid found pet hair and human hair still built up round the brush despite Xiaomi's anti-tangle design.
Mopping
Reviewers found problemsBoth found the mop only dampens the floor. Frandroid saw uneven wet streaks and warns it would spread spilt coffee or sauce, and Presse-citron found even the highest water setting just moistened the floor.
Navigation and obstacles
Reviewers found problemsIt gets round rooms methodically, but Frandroid called obstacle detection catastrophic, with slippers, laundry and cables driven over, and Presse-citron found cables and socks slipped past its sensors and could jam it. Room splitting needed fixing by hand in both tests.
Dock and upkeep
Mixed resultsThe dock empties the bin into a 4-litre bag that Presse-citron expected to last two or three months. But it does nothing for the mop, so Frandroid and Presse-citron both had to remove, rinse and dry the pad after every run.
App and software
Mixed resultsBoth found the Xiaomi Home app covers the basics, including maps, schedules and no-go zones. But Frandroid found it took too many taps to clean one room, and Presse-citron found the menus basic and awkward.
Noise
Not enough evidenceOnly Frandroid measured noise: 65dB in normal mode, which it found high for the suction on offer and loud enough to disturb a phone call or TV.
Reliability and support
Not enough evidenceNone of the reviews we use has judged long-term reliability or Xiaomi's support. Presse-citron used it for two months without reporting faults.
Value
Mixed resultsPresse-citron and Frandroid both see it as a fair budget buy for vacuuming clear hard floors, but say the low price shows in its obstacle detection, mopping and app.
Verdicts come from independent, hands-on, finished reviews. An area needs at least two of them before we say more than “Not enough evidence”. We don't score robots ourselves. How this works
Good vacuuming on clear floors
Presse-citron was convinced by how it picked up dust, crumbs and hair on hard floors and thin rugs, and found the brush good at pulling dirt out of corners. Frandroid found a first pass left some bits, partly because the side brush flicked them away, but a second, crossways pass cleared the rest. It copes with thin carpet but is out of its depth on thick pile, Frandroid adds.
The mop is a damp wipe
Frandroid found the pad wetted unevenly, left streaks and would spread spilt coffee or sauce rather than clean it up. Presse-citron found even the highest water setting only dampened the floor. The pad can't lift, so it wets everything it drives over, and the dock doesn't wash it. Both advise taking it off after each use, because otherwise it sits damp on the floor at the dock.
Small objects get past it
Frandroid called obstacle detection catastrophic: slippers, laundry and cables went straight under it, and it only avoided hard things like furniture legs by bumping into them. It also got stuck pushing against a threshold it couldn't climb. Presse-citron found cables and socks escaped its sensors and could jam it. Clear the floor before every run.
Maps well, but check the rooms
Presse-citron got its 70 square metre flat mapped in about 20 minutes, but had to fix muddled room boundaries by hand. Rooms weren't recognised automatically for Frandroid either, though you can merge, split and name them in the app. Neither tester saw it detect rugs, so you mark them on the map to keep the mop off. Frandroid also found the app needed too many taps to clean a single room.
Battery: fine for vacuuming only
Over two months, Presse-citron found vacuuming alone always covered its roughly 60 square metre test area. With the mop on, it had to go back and recharge with about a third still to do. That's one home, not a fixed limit, but it points to vacuuming as the main job, with the odd separate mopping run.
Our take
Should you buy the Robot Vacuum H40?
Best for: Homes wanting regular vacuuming with a bin that empties itself. Skip it if: Cables, socks or small toys are often left on your floors.
Buy the H40 if you want a mapping robot that empties itself for not much money, your floors are mostly hard and fairly clear, and you'll rarely use the mop. Skip it if cables, socks or toys live on the floor, or if you want real mopping. The Xiaomi X20+ adds a dock that washes the mops, and the Dreame D10 Plus Gen 2 is a well-tested self-emptying alternative.
The H40 is one of Xiaomi's cheapest robots with both a laser that maps your home and a dock that empties itself. The dock is a slim tower with a 4-litre dust bag that Xiaomi says lasts up to 90 days. There's also a clip-on mop with a small water tank, but it's a basic cloth that stays down the whole time and isn't washed by the dock.
The trade-off is the lack of smarts. It won't detect rugs or small objects on its own, so you mark rugs on the map and tidy up first. The mop can't lift, and with no tray under the dock, a damp pad sits on your floor if you leave it on.
Before you buy
The questions people ask about this one
Will it avoid cables and pet mess?
No. Frandroid saw it drive over slippers, laundry and cables, and Presse-citron found cables and socks could jam it. It has basic sensors rather than a camera, per the specifications. Tidy up first and keep it away from pet accidents.
Does it fit under low furniture?
It is 9.7cm tall including the laser turret, per the specifications. Presse-citron saw it reach beneath low furniture in its test home. Measure your own gaps and allow some extra space for movement and uneven floors before relying on it to clean underneath.
Can it leave the mop off for carpet?
Not automatically. The pad doesn't lift and the robot can't detect rugs, so Frandroid and Presse-citron both had to mark rugs on the map to keep the mop off them. For carpet, clip the mop module off and vacuum only.
How often do I have to empty or refill anything?
The dock handles dust: its 4-litre bag is rated for up to 90 days, per the specifications, and Presse-citron expected two or three months between changes. The mop is manual, though. Frandroid advises filling the small tank and wetting the pad before each run, then taking it off to clean afterwards.
Can it cross rugs and raised thresholds between rooms?
Xiaomi claims it crosses thresholds up to 2cm, per the specifications. Frandroid had it stuck pushing against one threshold it couldn't cross. Presse-citron found it convincing on very thin rugs, and Frandroid says thick pile is too much for it.
Alternatives
Other robot vacuums to compare.
D10 Plus Gen 2
Why consider it: Maps your home and empties itself into a bag for up to three months, and it's very good on hard floors.
The compromise: It's weak on thick carpet and runs over cables and socks.
RV30 Max Plus
Why consider it: Low-cost laser mapping with a compact emptying dock, and it cleans methodically.
The compromise: Fine grit and sticky spills beat it, and the mop is a clip-on drag pad too.
Robot Vacuum X20+
Why consider it: Its dock empties the bin and washes the mops, and it vacuums far better than its price suggests.
The compromise: You have to mark rugs on the map yourself and tidy cables away.
Specs
Full specifications
Each specification names its source. Manufacturer claims are not independent test results; unconfirmed figures are labelled.
Owner reviews
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Sources
Where this page’s findings come from
Editorial reviews
- Frandroid: Test du Xiaomi H40 ↗7 / 10Hands-on
- Presse-citron: Test Xiaomi Vacuum H40 ↗7.2 / 10Hands-on, 2 months at home
Sources
Videos
- NoHypeTech: Xiaomi H40 Robot Vacuum Review | Is It Worth It ↗
- DIY GUIDES: Xiaomi Robot Vacuum H40 Honest Review: Strong Suction or Just Hype? ↗
- Search YouTube for Xiaomi Robot Vacuum H40 ↗Search results may include company demonstrations or similar models. Check the source and model name; a demonstration is not an independent performance test.