Dreame L40s Ultra
The value pick of Dreame’s range: strong measured carpet cleaning, long runtime and a full self-cleaning dock for about half the flagship price.
Amazon $499.97$499.97
4.5/5
One of the best carpet cleaners among mid-price roller-mop robots, with a full hot-water dock; a good fit for mixed carpet and hard floors where thresholds are low.
- Washes mop + emptiesDock
- 91% measuredCarpet pickup
- LiDAR + cameraNavigation
- RollerMop
- 3.9 inHeight
Check price at Amazon$658.59
Price checked October 26, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Lifted 91% of sand worked into carpet, near the top of Vacuum Wars’ tests
- Lifted all the flattened pet hair with none wrapped on the brushes
- Roller mop is soaked in water up to 167°F at the dock and dried with 145°F air
- Fits under furniture 3.9 in high
Cons
- Climbs thresholds only up to 0.8 in
- Dock takes 3 L dust bags you keep buying
- No automatic detergent dosing; the dock takes a solid cleaner instead
- Covered about 1,130 sq ft per charge in Vacuum Wars’ test, less than most ECOVACS models
How it scores
The rating comes from 5 measured or published factors, each scored 0-100 against fixed reference points for its type. How we rank explains each one.
Independent tests
What independent testers measured, on their own test floors with their own units. Carpet deep clean and pet hair are the share of debris lifted; these feed the Cleaning score.
| Tested by | Carpet deep clean | Pet hair | Hair tangle (0 = none) | Area per charge | Conditions |
|---|---|---|---|---|---|
| Vacuum Wars | 91% | 100% | 0 | 1,132 sq ft | Embedded sand in medium-pile carpet; flattened 2.5 in pet hair on carpet, two runs; 7 in hair tangle on hard floor (0 = none wrapped). |
Specifications
| Vacuum | |
|---|---|
| Claimed suction | 24,800 Pa |
| Main brush | single floating bristle brush (cyclone-directed, ZeroTangle 3.0) |
| Dustbin | 220 mL |
| Extending side brush | No |
| Mopping | |
| Mop | Roller, lifts 15 mm, extends to edges |
| Mop lift | 15 mm |
| Leaves mop at dock | No |
| Extending mop | Yes |
| Water tank | 110 mL |
| Dock | |
| Dock | Washes mop + empties |
| Self-empties | Yes |
| Dust bag | 3 L |
| Washes mop | Yes |
| Hot-water wash | Yes |
| Hot-air drying | Yes |
| Detergent dosing | No |
| Clean water tank | 4 L |
| Navigation & app | |
| Navigation | LiDAR + camera |
| Obstacle avoidance | Structured light plus RGB AI camera with AI object recognition (AIVI 3D 3.0) |
| Climbs thresholds | 20 mm |
| Build | |
| Height | 3.9 in (98 mm) |
| Retracting LiDAR | No |
| Battery | 6,400 mAh |
| Warranty | 1 year |
| Released | 2026-02 |
Alternatives in this type
Ecovacs Deebot T80 Omni
A well-rounded roller-mop robot at a mid-range price: strong carpet and hair results and a hot-water washing dock, without the fast charging or detergent dosing of ECOVACS’ pricier models.
Amazon $549.99$549.99
Yeedi M14 Plus
A low-cost way to get a hot-washing roller-mop dock robot; cleaning is solid, though yeedi publishes few specs.
yeedi $499.99$499.99
Compare
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