Robot Vacuum H40
A robot that vacuums and mops with a flat pad. Its dock empties the bin.
Vacuum and mopPrice band: Under $500
Our take
The most sensible way into robot vacuums that we list: 10,000 Pa, a self-emptying dock with a 4-litre bag, and our under-$500 band. At 9.7 cm it won't fit under the lowest couches.
By Emma Walsh
The usual worry with a robot from the under-$500 band is that you’ll be babysitting it. The H40’s specs answer most of that worry, with laser mapping, a self-emptying dock and a decent amount of suction.
That suction is 10,000 Pa, with four levels to choose from between silent and turbo. Underneath, a V-shaped main brush runs against a comb that strips hair off it. There are two side brushes: an anti-tangle one for hard floors, and a plain one you fit in its place for carpet.
Carpet is where the app comes in. In Xiaomi Home you tell the robot how to treat each carpet in the house, and the choices are cross, ignore, avoid or vacuum only. The last one is useful in a house where the robot also mops, because its mop is a flat pad fed by a 210 ml tank, with three levels of flow.
After a run the robot’s dust is sucked into a bag in the dock that holds 4 litres, and nothing in our list has a bigger one. You’ll need to find 34 x 16 x 32.6 cm for that dock. It’s why the H40 is the first robot we’d suggest in our guide to budget robot vacuums and the budget pick in our guide to self-emptying robots.
The battery is 5,200 mAh, and the robot vacuums and mops for up to 180 minutes in standard mode. It weighs 3.64 kg and works with Alexa and Google Assistant.
Check one measurement before you order. The robot is 9.7 cm tall, so it needs a gap bigger than that under the couch. It climbs a 2 cm sill.
If your floor is never quite clear, look at the Narwal Freo S from the same band. It has a front light sensor and a 3.5-litre bag, and it gives up some suction at 8,000 Pa. For everyone else on a tight budget, the H40 is the one we’d buy.
Against the other 40 robots
Where it sits in our list
Suction10,000 Pa
4,000 PaFurther right pulls harder.36,000 Pa
Height9.7 cm
7.2 cmFurther left fits under lower furniture.12 cm
Step it climbs2 cm
2 cmFurther right gets over taller door sills.4.8 cm
Checked 11 November 2026
The spec sheet
Each number shows where we read it. Open a row to see the words it came from. "Not stated" means we couldn't find the number on the brand's page or the listing.
What the dock does
- Empties the binYes
- Washes the mopNot listed
- Dries the mopNot listed
- Refills the waterNot listed
- Adds detergentNot listed
What it doesVacuums and mopsThe brand's own page
What the page says"it can vacuum and mop for up to 180 minutes on a full charge in standard mode"
Suction10,000 PaThe brand's own page
The most it can pull, on its strongest setting.
What the page says"the robot vacuum can achieve suction of up to 10,000Pa"
Finds its way byLaser (LiDAR)The brand's own page
What the page says"LDS high-precision mapping 360° house-wide scanning and mapping"
Spots clutter withNot stated
A front sensor for cables, socks and toys.
We leave a blank where we can't confirm a number.
MopFlat padThe brand's own page
What the page says"Equipped with a 210mL* water tank and three water flow levels"
Mop lifts on carpetNot stated
We leave a blank where we can't confirm a number.
Climbs a step of2 cmThe brand's own page
One step, like a door sill.
What the page says"Able to handle door thresholds up to 20mm*"
Height9.7 cmThe brand's own page
Check it against the gap under your furniture.
What the page says"Vacuum dimensions 340 x 340 x 97mm"
Battery5,200 mAhThe brand's own page
What the page says"Battery capacity 5200mAh (nominal capacity)"
Longest run180 minutesThe brand's own page
The brand's longest figure, on a gentle setting.
What the page says"it can vacuum and mop for up to 180 minutes on a full charge in standard mode"
Bin in the robotNot stated
We leave a blank where we can't confirm a number.
Dust bag in the dock4 litresThe brand's own page
What the page says"The actual maximum capacity was ≥4L"
More details
Main brushV-shaped main brush with a comb that strips hair off itThe brand's own page
What the page says"With a comb-like structure paired with a golden V-shaped main brush"
Side brushAnti-tangle side brush for hard floors; swap to the plain side brush for carpetThe brand's own page
What the page says"The anti-tangle side brush is not suitable for carpet cleaning. It should be replaced by the side brush to meet carpet cleaning needs."
Water tank (robot)210 ml, three water flow levelsThe brand's own page
What the page says"Equipped with a 210mL* water tank and three water flow levels"
Carpet handlingSet per carpet in the app: cross, ignore, avoid or vacuum onlyThe brand's own page
What the page says"Carpet crossing Ignore carpet Carpet avoidance Vacuums only on carpets"
Weight3.64 kg (robot)The brand's own page
What the page says"Net weight 3.64kg"
Dock size340 x 160 x 326 mmThe brand's own page
What the page says"Dock dimensions 340 x 160 x 326mm"
App and voiceXiaomi Home app; works with Alexa and Google AssistantThe brand's own page
What the page says"Voice control works with Amazon Alexa or Google Assistant."
Suction levelsFour: silent, standard, strong and turboThe brand's own page
What the page says"Silent mode Standard mode Strong mode Turbo mode"
Buying guides
