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Dreame L40s Ultra AE

Ratings at the stores

4.7 out of 5. 619 reviews from 3 stores in 2 countries

  • Coolblue NL 4.7 (4.7 out of 5) · 338 reviews Read Nov 14
  • Saturn DE 4.7 (4.7 out of 5) · 279 reviews Read Nov 14
  • Kaufland.nl NL 5.0 (5.0 out of 5) · 2 reviews Read Nov 14

How we combine them. Each store counts once, with its biggest listing of this model, and its rating weighs by its number of reviews.

Not counted: Amazon (its terms do not allow us to show its ratings).
Dreame L40s Ultra AE (black)

We may earn a commission when you buy through these links. It never changes our ranking.

Which robot is right for your home? Find out in 7 questions →

About this model

For anyone who wants a complete station and accepts the lowest spot in the list, it is often one of Dreame's cheaper all-in-one robots.

Learn more →

Who it suits

Good for

  • Rugs and carpet: lifts the mop 0.4 in (10.5 mm)
  • Pets: anti-tangle brush
  • Mopping: station washes and dries the mop
  • Upkeep: all-in-one station
  • Water hookup: dock connects to the water supply
  • Clutter on the floor: AI camera recognizes obstacles

Not for

  • Low furniture: 3.8 in (9.7 cm) tall

From the facts the maker states, by the rules of our advisor.

On this page

  1. OverviewRank 36 of 94
  2. Stores
  3. Price historylast 90 days, no drop seen yet
  4. What to expect1 test, 1 min read
  5. Specifications43 facts
  6. Our scorescore 7.4 out of 10
  7. Ratings4.7 out of 5, 619 reviews
  8. Questions5 questions
Dreame L40s Ultra AE (black)

Before you buy, compare it with 2 recommended alternatives ?

Green is the best of these 3, also when they share the lead.

This model Dreame L40s Ultra AE Best on 2 facts Cheapest of the top 10 Dreame L50 Ultra Best on 4 facts Highest score here Roborock Qrevo Edge 3 Pro Best on 8 facts
Most important facts
Lowest price – $721Dreame (brand store) best $999Roborock (brand store)
Score 7.4 7.6 7.9 best
Customer rating – – –
Tests Just A Dad Approved Vacuum Wars Just A Dad Approved Vacuum Wars Just A Dad Approved Vacuum Wars
Suction power higher is better 19,000 Pa 19,500 Pa 36,000 Pa best
Runtime per charge longer is better 180 min 200 min 256 min best
Climbs thresholds up to higher is better 0.8 in (20 mm) 1.7 in (42 mm) 1.8 in (45 mm) best
Robot height lower is better 3.8 in (9.7 cm) 3.8 in (9.7 cm) 3.1 in (8 cm) best
Mop lift on carpet higher is better 0.4 in (10.5 mm) 0.4 in (10.5 mm) 0.6 in (15 mm) best
Dust bag lasts longer is better up to 100 days best up to 100 days best up to 65 days

Compare all 26 facts →

Prices per store

Shipping included, sales tax added at checkout. We may earn a commission when you buy through our links. How we read and order prices

Also at Amazon, price not shown yet: Amazon.com (black).

What you can expect from the Dreame L40s Ultra AE

Our score7.4 Rank 36 of 94
Ratings4.7 619 reviews
Robot height3.8 in

What testers say about the Dreame L40s Ultra AE

For anyone who wants a complete station and accepts the lowest spot in the list, it is often one of Dreame's cheaper all-in-one robots.

The Dreame L40 Ultra AE, sold in the United States as the L40s Ultra AE, is an all-in-one robot with two spinning mop pads of which one extends, an anti-tangle main brush and obstacle recognition with a camera and 3D structured light. The station empties the bin into a 3.2-liter bag good for about a hundred days, washes the pads in 167 °F water, dries them with hot air, cleans its washboard and doses cleaning solution; a water-line kit is sold separately. Vacuum Wars places it twentieth and last in its top 20.

What the testers highlight is the equipment for homes with pets: the robot recognizes food bowls and litter boxes and can avoid them or clean around them, and the app offers live video with two-way audio. The 5,200 mAh battery, the 395 ml bin and the 4.5 and 4-liter water tanks are generous for this class, and the pads lift on carpet.

The limitations: the side brush does not extend, the pads are not detached automatically for a vacuum-only run, thresholds stop at 0.8 inches and there is no climbing system. According to Vacuum Wars the obstacle recognition knows around 120 kinds of objects, fewer than the newer models.

Pros

Cons

  • Lacks the extending side brush of the pricier L40s Ultra Vacuum Wars ↗
  • Has no way to drop its mops in the dock before vacuuming carpet 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 AE specifications ?

Product on the market since April 2025 · Also sold or tested as: Dreame L40 Ultra AE (Europe)

Manual (PDF)
Climbs thresholds up to0.8 in
Mop lift on carpet0.4 in
Runtime per charge180 min
Suction power19,000 Pa

Consumables: a 3.2 l dust bag in the station, which lasts up to 100 days.

Dimensionsrobot and dock

Dock, from the front 23.2 in high 13.4 in deep 23.2 in 18 in wide Robot, from the side 13.8 in across 3.8 in

From the published dimensions. The robot passes under furniture with 3.9 in of clearance or more. The dock needs a spot 18 in wide and 13.4 in deep.

Suction and brushes 7 facts
Suction power
19,000 Pa
Anti-tangle brush
yes
Main brush
rubber
Extending side brush
no (assumed)
Carpet detection
detects carpet
Suitable for pet hair
yes
Dirt detection
yes
Mopping 5 facts
Mop type
spinning pads
Mop lift on carpet
0.4 in (10.5 mm)
Mop extends to the edges
yes
Automatic mop detach
no (assumed)
Mop refreshed while mopping
no (assumed)
Dock 13 facts
Empties the dust bin
yes
Bagless
no
Dust bag capacity
3.2 l
Dust bag lasts
up to 100 days
Washes the mop
yes
Wash temperature
167 °F (75 °C)
Dries the mop
yes
Hot-air drying
yes
Dispenses detergent
yes
Plumbing hookup
yes
Clean water tank
4.5 l
Dirty water tank
4 l
Dock size (w × d × h)
18 × 13.4 × 23.2 in (45.7 × 34 × 59 cm)
Navigation and obstacles 6 facts
Navigation
LiDAR turret
Obstacle avoidance
AI camera
Climbs thresholds up to
0.8 in (20 mm)
Climbing system for high thresholds
no (assumed)
Camera on board
obstacle camera
Stair-edge sensors
yes
Robot 5 facts
Robot height
3.8 in (9.7 cm)
Robot diameter
13.8 in (35 cm)
Robot weight
8.8 lb (4 kg)
Dust bin in the robot
395 ml
Noise while cleaning
74 dB
Battery 3 facts
Battery capacity
5,200 mAh
Runtime per charge
180 min
Charging time
3.5 h
Smart features and warranty 4 facts
Matter
no (assumed)
Voice assistants
Alexa, Google Assistant, Siri
Warranty
2 years
Scheduled runs
yes

Where a row says “no (assumed)”, the maker's full product page for this model names the feature nowhere, so we take it as a no.

Sources: nl.dreametech.com · coolblue.nl · Manual

Our score

Confidence: high. Two or more test sites, or one test site and 300 or more owners’ ratings. The highest score today is 7.9.

  • Test sites 60%7.0

    5 cleaning abilities measured, on one scale for every robot.

    • Deep clean on carpet6.4
    • Pet hair8.3
    • Mopping7.1
    • Obstacle avoidance7.1
    • Navigation7.1

    Deep clean on carpet: Just A Dad Approved 5.6 · Vacuum Wars 7.3. Pet hair: Just A Dad Approved 8.3 · Vacuum Wars 8.2. Mopping: Just A Dad Approved 7.0 · Vacuum Wars 7.2. Obstacle avoidance: Just A Dad Approved 7.0 · Vacuum Wars 7.3.

    Measured by Just A Dad Approved (read on September 9, 2026) · Vacuum Wars (read on September 29, 2026).

    Measured 7.2, counted 7.0, pulled toward its station type’s average.

  • Owners’ ratings 25%–

    Owners’ ratings, 25%: none yet at the stores that ship to the United States, so this part is left out and the others count for more.

  • Features 15%8.9

    82 of 92 points for the facts the maker states.

  • Price never countsA sale can’t lift a model. Today’s lowest price sits beside the score, checked every morning.
  • No test, no rankOnly robots a test site has tested are ranked. The rest get a provisional score.
  • Reviewers beside, not insideReviewers’ picks are shown next to the score and do not count in it.

How we work this out →

The testers’ picks

Positions and labels, never text. These picks are shown beside the score and do not count in it. How the score comes about is on the method page.

Ratings at the stores

Buyers rate the Dreame L40s Ultra AE 4.7 out of 5, from 619 reviews at 3 stores (Coolblue NL, Saturn DE, Kaufland.nl NL). We read the ratings on November 14, 2026.

4.7 out of 5. 619 reviews from 3 stores in 2 countries

By country

  • Netherlands, 2 stores 4.7 (4.7 out of 5) · 340 reviews
  • Germany, 1 store 4.7 (4.7 out of 5) · 279 reviews

The bar is the country's share of the reviews.

StoreRatingReviewsRead
Coolblue NL 4.7 (4.7 out of 5) 338 Nov 14
Saturn DE 4.7 (4.7 out of 5) 279 Nov 14
Kaufland.nl NL 5.0 (5.0 out of 5) 2 Nov 14

How we combine them. Each store counts once, with its biggest listing of this model, and its rating weighs by its number of reviews.

Not counted: Amazon (its terms do not allow us to show its ratings).

Frequently asked questions about the Dreame L40s Ultra AE

What has the Dreame L40s Ultra AE cost?

In our other editions it costs today: Netherlands € 474 at bol.com.

How do buyers rate the Dreame L40s Ultra AE?

Buyers rate the Dreame L40s Ultra AE 4.7 out of 5, from 619 reviews at 3 stores (Coolblue NL, Saturn DE and Kaufland.nl NL). We read the ratings on November 14, 2026.

Does the Dreame L40s Ultra AE wash and dry its own mop?

Yes, with water at 167 °F (75 °C). Drying is done with warm air.

Is the Dreame L40s Ultra AE suitable for pet hair?

Yes, the maker says. The brush guides hair to the side instead of winding it around the roller.

How long does the Dreame L40s Ultra AE run on one charge?

180 minutes on its quietest setting. A full charge takes 3.5 hours.

The maker

Dreame

Dreame Technology makes robot vacuums and mops, cordless stick vacuums, wet and dry vacuums and hair dryers. Its founder, Yu Hao, started the business in 2015 with work on high-speed digital motors, and its headquarters and factory are in Suzhou, China. At the end of 2017 Dreame joined Xiaomi's ecosystem of partner companies.

dreametech.com

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