Dreame
Dreame L40s Ultra CE
Rank 51 of 65 robots with an all-in-one station in our consensus, named by 1 of our 5 sources.in our consensus, named by 1 of 5 sources
Score 40 out of 100
Of our 5 test sources, one names the Dreame L40s Ultra CE, and the higher that source ranks it, the higher the score.
The more sources name a model, the closer its score can get to 100. One source alone gives 50 at most.
The highest score today is 66.
On September 27, 2026 the lowest price for the Dreame L40s Ultra CE is $469 at Amazon.com, shipping to the United States included. In our consensus it is rank 51 of 65 with an all-in-one station, named by 1 of the 5 test sources.
Is the Dreame L40s Ultra CE right for your home? Find out in 7 questions →
- Vacuum Wars ↗Position 64 of 151
Prices per store
All prices include shipping to the United States. Sales tax is added at checkout. We may earn a commission when you buy through these links. It never changes our ranking.
| Store | Color | Price | Delivery time and returns | Reviews | Checked | Link to the store |
|---|---|---|---|---|---|---|
 Amazon.com blacklowest price | black | $469lowest price in 90 days: $398 | about 1–5 dayslowest price | ★ 4.0 (256) | 22 hours ago | Visit store ↗ |
Price history
What the tests like and dislike about the Dreame L40s Ultra CE
Pros
- Removed embedded sand from carpet better than most robots tested Vacuum Wars ↗
- With its anti-tangle brush fitted, long hair did not wrap around the roller Vacuum Wars ↗
- Spinning mops do a good job and lift clear of carpet on their own Vacuum Wars ↗
Cons
- One of the weakest robots tested at avoiding objects on the floor Vacuum Wars ↗
- Covered the test floor plan clearly less efficiently than its L40s siblings Vacuum Wars ↗
- Slightly weaker at lifting pet hair from carpet than the other L40s models Vacuum Wars ↗
Each point sums up, in our words, the review of the test it names, and its link leads to that review. We do not summarize RTINGS or Wirecutter: their lists are linked above.
Dreame L40s Ultra CE specifications
The numbers that matter first, then every fact by group. As published by the maker or the store we read it from.
Consumables: a 3.2 l dust bag in the station, which lasts up to 100 days.
Dimensionsrobot and dock
From the published dimensions. The robot passes under furniture with 4.1 in of clearance or more. The dock needs a spot 13.4 in wide and 18 in deep.
Suction and brushes 3 facts
- Suction power
Suction in pascal, as the maker measures it. More pascal helps on carpet, but it says little about how well the robot picks grit off a hard floor.
- 13,000 Pa
- Anti-tangle brush
A brush that guides hair to the side instead of letting it wind around the shaft. It saves the cutting work in homes with long hair or pets.
- yes
- Extending side brush
The side brush swings out in a corner or along a baseboard, so the dust there is swept in too.
- no
Mopping 4 facts
- Mop type
How the mop is built: flat pads, two spinning discs or a roller. Discs press harder on dried-on dirt, a roller rinses itself while it works.
- spinning pads
- Mop lift on carpet
How far the robot lifts the mop when it drives onto a carpet. From about 0.4 in (10 mm) a medium pile stays dry.
- 0.4 in (10.5 mm)
- Mop extends to the edges
The pad slides out along a wall or a baseboard, so the last few inches are mopped as well.
- yes
- Automatic mop detach
The robot leaves the mop at the dock before it vacuums a carpet, so the carpet never gets wet.
- no
Dock 11 facts
- Empties the dust bin
The dock empties the robot’s dust bin, usually after every run. You only empty the dock’s bag or bin.
- yes
- Bagless
The dock collects dust in a bin instead of a disposable bag. No bags to buy, but you empty it yourself.
- no
- Dust bag capacity
How much the dust bag in the dock holds.
- 3.2 l
- Dust bag lasts
How long the maker says a dust bag lasts with daily use. With pets or a lot of carpet it is shorter.
- up to 100 days
- Washes the mop
The dock washes the mop for you, so you do not rinse it by hand.
- yes
- Dries the mop
The dock dries the mop afterwards, so it does not sit there wet and start to smell.
- yes
- Hot-air drying
Drying is done with warm air instead of cold. It is faster and it helps against smell.
- yes
- Dispenses detergent
The dock mixes detergent into the water itself, from its own bottle.
- yes
- Clean water tank
The clean water tank in the dock, which wets the mop.
- 4.5 l
- Dirty water tank
The tank that catches the dirty water from the mop. You empty this one yourself.
- 4 l
- Dock size (w × d × h)
The width, depth and height of the dock. Measure the spot you have in mind, and leave room for the lid and for the robot driving in.
- 13.4 × 18 × 23.2 in (34 × 45.7 × 59 cm)
Navigation and obstacles 3 facts
- Navigation
How the robot maps your home and follows that map. Lidar measures with a laser and works in the dark, a camera looks along and recognizes more.
- LiDAR turret
- Obstacle avoidance
How the robot sees loose things on the floor, such as cables, socks or a pet accident. A camera with depth sensing sees more than a bumper that reacts on contact.
- 3D sensor (structured light)
- Climbs thresholds up to
The highest threshold the robot takes, as the maker states it. Measure your own: the step into a bathroom or onto a balcony is often higher.
- 0.8 in (20 mm)
Robot 4 facts
- Robot height
How tall the robot is. It decides whether it fits under your sofa, bed or cabinet.
- 4.1 in (10.4 cm)
- Robot diameter
How wide the robot is. Narrower gets between chair legs more easily, wider usually means a bigger dust bin.
- 13.8 in (35 cm)
- Robot weight
What the robot weighs. It counts most if you carry it up a staircase every day.
- 8.6 lb (3.9 kg)
- Dust bin in the robot
How much dust the robot holds before you empty it. It matters less with a self-emptying dock, which empties the bin after every run.
- 320 ml
Battery 2 facts
- Battery capacity
The capacity of the battery. It hints at the runtime, but how much the robot draws counts just as much.
- 5,200 mAh
- Runtime per charge
How long the robot cleans on one charge, at its quietest setting. After that it recharges and carries on where it stopped.
- 260 min
Smart features and warranty 1 fact
- Voice assistants
Which voice assistants the robot works with, such as Google Assistant or Alexa.
- Alexa, Google Assistant, Siri
Sources: dreametech.com
What the tests say
- Vacuum Wars · Position 64 of 151September 26, 2026
Positions and labels, never text. How we combine those positions is on the method page.
