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
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.
- Washes mop + emptiesDock
- 89% measuredCarpet pickup
- LiDAR + cameraNavigation
- RollerMop
- 3.9 inHeight
- 4 h 57 minRun time
Check price at Amazon$549.99
Price checked October 26, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Lifted 89% of sand from carpet and 99% of pet hair in Vacuum Wars’ tests, with no hair wrapped
- Rated for up to 297 minutes; covered about 1,300 sq ft per charge in Vacuum Wars’ test
- Self-rinsing roller mop is washed at the dock in water up to 167°F
- Fits under furniture 3.9 in high
Cons
- Mop drying runs at only 113°F (45°C), cooler than pricier ECOVACS docks
- No automatic detergent dosing
- Climbs thresholds only up to 0.8 in
- ECOVACS doesn’t list Alexa or Google Assistant support
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 | 89% | 99% | 0 | 1,303 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 | 18,000 Pa |
| Main brush | single floating bristle brush (ZeroTangle 3.0) |
| Dustbin | 220 mL |
| Extending side brush | No |
| Mopping | |
| Mop | Roller, lifts 10 mm, extends to edges |
| Mop lift | 10 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 |
| Water hookup option | No |
| Clean water tank | 4 L |
| Navigation & app | |
| Navigation | LiDAR + camera |
| Obstacle avoidance | RGB camera plus structured-light depth sensing 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 |
| Run time | Up to 4 h 57 min |
| Weight | 10.9 lb (5 kg) |
| Warranty | 1 year |
| Released | 2025-05 |
Alternatives in this type
Ecovacs Deebot T80S Omni
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.
Amazon $658.59$658.59
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
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