Dreame L40s Ultra
Dreame says the L40s Ultra climbs thresholds up to 22 mm (single step, maker's number), stands 3.82 in tall, lifts its mop 10.5 mm over rugs, and holds 100 days of dirt in its dock.
Refills: about $24 a year for 1 of its 4 parts at Amazon prices checked November 2, 2026. The rest are not published. Details.
Price as of November 2, 2026.
| Limit | Maker figure | Source |
|---|---|---|
| Threshold, up to | 22 mm (single step, maker's number) | dreametech.com |
| Height | 3.82 in | dreametech.com |
| Mop lifts | 10.5 mm | dreametech.com |
| Dock holds dirt for | 100 days | dreametech.com |
On our guides
- Pet hair, hardwood floors: passes all 5 pet checks, also worth it
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Compare: Which Dreame robot vacuum to buy.
Maker figures, not our tests. Method.
Amazon listing
We link DREAME L40s Ultra Robot Vacuum and Mop, 19,000Pa Suction & Auto Empty | Mop Self-Cleaning, 100% Detangling Duo. Not linked:
- A different model: dreame L40 Ultra Gen 2 Robot Vacuum and Mop with 25,000Pa Suction | Extendable Side Brush & Mop, All
Who it suits
Best for emptying the dock as rarely as possible: 100 days, ahead of 68% of the 48 robot vacuums we track that publish it. The trade-off: a small mop lift, so the mop can touch low rugs (10.5 mm, behind 86% of them).
What the maker says the Dreame L40s Ultra does
Mopping
It mops with two spinning pads. It lifts the mop 10.5 mm when it reaches a rug. (maker page)
Mop upkeep
The dock washes the mop and dries it with warm air. (maker page)
Obstacle avoidance
It spots objects in its path with structured light (maker page).
Dock
Empties itself into a bag: about 100 days per bag, 3200 ml bag. (maker page)
App and Wi-Fi
- Without the app: Press the Clean button on the robot to start a clean. No app needed. (maker’s words)
- Without internet: Saved map and no-go zones stay on the robot. Remote start and schedules need Wi-Fi. (maker’s words)
Parts, warranty and repair
Where Dreame sells parts and how it handles repairs: Dreame parts, warranty and repair.
Dreame L40s Ultra refills: cost a year
Prices November 2, 2026.
| Part | Replace | Amazon pack | A year |
|---|---|---|---|
| Dock dust bag | up to 100 days per bag (maker) | $19.99 for 3 at Amazon | $24 |
| Main brush | not published | not published the maker does not publish how often to replace it | not published |
| Filter | not published | not published the maker does not publish how often to replace it | not published |
| Mop pads | not published | not published the maker does not publish how often to replace it | not published |
Total for the refills we could price: $24 a year.
More limits Dreame publishes
| Limit | Maker figure | Read from |
|---|---|---|
| Mop | two spinning pads | dreametech.com |
| Self-emptying dock | yes | dreametech.com |
| Anti-tangle | yes | dreametech.com |
| Suction | 19,000 Pa | dreametech.com |
| Obstacles | 3D sensor | dreametech.com |
| Washes its own mop | yes | dreametech.com |
| Dries the mop | yes | dreametech.com |
| Mapping | lidar | dreametech.com |
| Dock bag | 3,200 ml | dreametech.com |
Recall check (US and Canada): none found, November 2, 2026.
Next: Robot vacuums under $500.
Other Dreame models we track: D20 Air Plus, D30 Ultra CE, L10s Ultra, L40 Ultra Gen 2, L50 Ultra, L60 Pro Ultra, L60 Ultra, L60 Ultra FE, L60 Ultra PE, X50 Ultra, X60 Max Ultra Complete. Side by side: Which Dreame robot vacuum to buy.