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
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.
- Washes mop + emptiesDock
- 92% measuredCarpet pickup
- LiDAR + 3D lightNavigation
- Dual spinning padsMop
- 3.8 inHeight
- 3 h 40 minRun time
Price checked October 26, 2026. As an Amazon Associate we earn from qualifying purchases.
- Lifted 92% of sand worked into carpet with no hair wrapped on the brushes in Vacuum Wars’ tests
- Covered about 1,540 sq ft per charge in Vacuum Wars’ test, enough for a large home in one run
- Full self-cleaning dock (empties, washes mops in hot water, dries, doses solution) for about $500
- Leaves its mop pads at the dock for carpet, so rugs stay dry
- Picked up 91% of pet hair, behind the best Dreames
- No AI camera in Dreame’s description, so it may be weaker at avoiding cables and pet mess
- Mop wash water reaches 167°F, below the 212°F of Dreame’s pricier docks
The Dreame L40s Ultra family
Every Dreame L40s Ultra model we rank, smallest first. Ratings compare each against its own type.
| Model | Dock | Rating | Price |
|---|---|---|---|
| Dreame L40s Ultra (this one) | Washes mop + empties | 4.6/5 | $499.97 |
| Dreame L40s Ultra AE | Washes mop + empties | 4.3/5 | $599.98 |
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 | 92% | 91% | 0 | 1,538 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 | 19,000 Pa |
| Main brush | HyperStream Detangling DuoBrush (bristled rubber brush plus TPU rubber brush) |
| Dustbin | 310 mL |
| Extending side brush | Yes |
| Mopping | |
| Mop | Dual spinning pads, leaves its mop at the dock for carpet, extends to edges |
| Mop lift | 10.5 mm |
| Leaves mop at dock | Yes |
| Extending mop | Yes |
| Dock | |
| Dock | Washes mop + empties |
| Self-empties | Yes |
| Dust bag | 3.2 L |
| Washes mop | Yes |
| Hot-water wash | Yes |
| Hot-air drying | Yes |
| Detergent dosing | Yes |
| Clean water tank | 4.5 L |
| Navigation & app | |
| Navigation | LiDAR + 3D light |
| Obstacle avoidance | 3DAdapt structured-light obstacle avoidance |
| Climbs thresholds | 40 mm |
| Voice assistants | Alexa, Google Assistant |
| Build | |
| Height | 3.8 in (97 mm) |
| Battery | 5,200 mAh |
| Run time | Up to 3 h 40 min |
| Weight | 9 lb (4.1 kg) |
| Warranty | 3 years |
| Released | 2025-08 |
Alternatives in this type
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 $549.99A low-cost way to get a hot-washing roller-mop dock robot; cleaning is solid, though yeedi publishes few specs.
yeedi $499.99Compare
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