Skip to main content.
Robo Selector
Vacuum Wars avatar
3.77 / 5 average expert rating

Dreame L40s Ultra

$ 1,099.99$ 1,499.99 MSRP

Dreame L40s Ultra Reviews and Ratings

Overall Score
Average of overall scores taken from industry experts.
Pet Score
Carpet Score
Hard Floor Score
Mopping Score
Customer Reviews
Customer sentiment analysis based on hundreds of online reviews. Shows positive, neutral, and negative feedback.
Dreame L40s Ultra robot vacuum and mop

The Dreame L40s Ultra offers 19,000Pa Vormax suction with a HyperStream Detangling DuoBrush that achieves 100% detangling performance using dual brush technology. Its EasyLeap system uses auxiliary wheels to cross obstacles up to 1.57 inches high including double-layer steps and door tracks. The robot features Dual Flex Arm Technology with extending side brushes and mops that reach into tight corners. It includes hot water mop washing at 167°F and AceClean DryBoard self-cleaning that cleans both the washboard and mop pads simultaneously. The base station auto-empties for up to 100 days and features fast mapping with 3DAdapt obstacle avoidance.

L40s Ultra Key Features

A quick guide to the L40s Ultra key features and what that actually mean.

  • EasyLeap - Additional wheels help the robot climb single threshholds up to 22mm and two-tier threshholds up to 40mm.
  • HyperStream - Two auto detangling brushes for deep cleaning on hard floors and carpet.

L40s Ultra Specifications

Overview

Brand
The manufacturer of the robot vacuum.
Model
Robot vacuum model name.
L40s Ultra
Region
View Dreame L40s Ultra prices and details specific to your country.
Warranty

Dreame provides a 3-year warranty on the L40s Ultra.

3 years
Refund Policy

Dreame provides a 30 day money-back guarantee on the L40s Ultra.

30 days
Home Country

Dreame is based in China.

China

Vacuum

Height

The height of the bot measured in inches. Bot's with lower values fit under more furniture.

97 mm
Suction Power

Pascals, or Pa, is a unit of pressure used to measure suction power with higher Pa values indicating stronger suction.

19000 pa
Noise Level

Noise level in decibels.

0 Db
Maximum Threshold Climb

The maximum step or threshold height in centimetres the robot can climb with higher values allowing it to cross more floor transitions.

40 mm
Battery Life

The runtime in minutes on a full charge. Higher values mean the robot can clean for longer before recharging.

220 min
Navigation Type

The technology used to map and move around (e.g. LiDAR, camera).

LiDAR
Obstacle Avoidance

Indicates if the robot can detect and avoid objects in real time, helping it clean without getting stuck.

Yes
Side Brushes

Additional small brush to sweep debris from edges into the main suction path.

Yes
Extending Side Brush

Side brush that extends beyond the vacuum casing to reach edges and corners more effectively.

Yes
Dirt Sensor

Allows the vacuum to detect dirtier areas and adjust cleaning intensity accordingly.

No
Baseboard Brush

An additional brush designed to sweep along baseboards for thorough edge cleaning.

No
HEPA Filter

Indicates if the vacuum uses a high-efficiency particulate air filter to trap fine dust and allergens, improving air quality.

Yes
UV Light

Indicates if the robot uses a UV light for additional sanitization of floors.

No
Dustbin Capacity

The size of the onboard dustbin, with larger capacities reducing how often it needs emptying.

395 litres

Mop

Mop Type

Type of mopping system such as spinning pad, roller mop or track mop - each have their benefits.

Dual Spinning Mops
Extendable Mop

Mop can extend outward to reach edges and corners better.

Yes
Raise Mop on Carpets

Robot can lift its mop to avoid wetting or dirtying carpets when vacuuming.

Yes
Mop Raise Height

Height in millimetres the mop can lift, with higher values better for clearing thicker carpets.

10.5 mm
Plumbing Connection

Robo vac connects to your home water supply for automatic water fill and drainage.

No

Dock

Self Emptying Bin

Robot can automatically empty it's dustbin into a larger container within the dock for less frequent manual emptying.

True
Bin Type

The kind of bin used in the dock (bagged or bagless).

Bagged
Bin Capacity

Number of days before the dock’s bin needs emptying based on average use.

100 days
Bin Capacity

Size of the dock’s bin measured in litres, with higher values meaning less frequent emptying.

3.2 litres
Self Cleaning

Dock can automatically clean itself to reduce maintenance.

Yes
Washes Mop

Dock can rinse and clean the mop pads automatically.

Yes
Washes Mop with Hot Water

Dock uses hot water for mop cleaning for improved sanitization.

Yes
Dries Mop

Dock can dry mop pads after washing to prevent odours and mould.

Yes
Detergent Auto Fill

Dock can automatically mix and dispense detergent for mopping.

Yes
Dirty Water Detection

Dock detects when dirty water needs replacing, ensuring effective mop cleaning.

Yes
Plumbing Connection

Dock can be directly connected to household plumbing for automatic water filling and draining.

No

App Features

No Go Zones

Shows if you can set virtual boundaries to stop the robot entering certain areas.

Yes
Multi Level Maps

Indicates if the robot can store maps for multiple floors of a home.

Yes
Room Select

States if you can choose specific rooms for the robot to clean.

Yes
Room Scheduling

Shows if you can schedule cleaning for specific rooms at set times.

Yes
Zone Cleaning

Indicates if the robot can target smaller areas or zones for cleaning instead of whole rooms.

 
Recharge and resume

States if the robot can return to the dock, recharge, and then continue cleaning from where it left off.

Yes
Live Video Monitoring

Shows if the robot has a camera feed for real-time home monitoring.

No
Pet Checkup

Indicates if the robot has a feature to check in on pets using its camera and app.

No

Smart Home

Smart Assistant

Shows if the vacuum supports voice assistants like Alexa, Google Assistant, or Siri.

No
Matter Compatability

Indicates if the robot supports Matter, allowing seamless integration with other smart devices.

No
WiFi

The supported WiFi bands (2.4GHz, 5GHz, or both), with dual-band offering more reliable connectivity.

2.4GHz
Physical Remote

Robot includes a physical remote control that works offline.

No

Size & Weight

Size

Height, Width and Depth (HxWxD) of the robot vacuum in mm.

97 x 350 x 350 mm
Weight

Weight of the robot vacuum in kgs.

4 kgs
Dock Size

Height, Width and Depth (HxWxD) of the robot's base station in mm.

590 x 340 x 457 mm
Dock Weight

Weight of the base station in kgs.

9 kgs
Package Size

Height, Width and Depth (HxWxD) of shipped packaging.

 
Package Weight

Weight of the shipped packaging.

 

Compare and Contrast with Confidence

See how the Dreame L40s Ultra stacks up against other models. Choose another robo vac to see side by side comparisons of reviews and specs.

vs

Frequently Asked Questions

Got questions about the Dreame L40s Ultra? We’ve got answers!

Is the Dreame L40s Ultra the best robot vacuum for my home?

When deciding which is best robot vacuum for you, consider what's most important for your home — do you have pets or children, deep-pile carpets or mostly hard floors? Review the the scores and features that matter the most to you and your home.

If you're unsure which features are important for you, try our free robot vacuum recommendation tool to get personalised recommendations at no cost.

You can also compare against other Dreame vacuums or other brands using our comparison tool to view side by side analysis.

Is the L40s Ultra good for pet hair?

When considering a robot vacuum for homes with cats and dogs, look for models with higher suction power, tangle-free brushes, and a good filtration system (like HEPA filters) to trap allergens.

Look for a vacuum with a high pet score. The Pet Score is the average of ratings from expert reviews we've collected, specifically focusing on how well each vacuum handles pet hair and obstacle avoidance. A higher score indicates better performance for homes with furry friends.

How are the scores and data generated?

Scores are generated based on reviews by known experts in the field. We analyze and review multiple sources by industry experts to create a comprehensive rating for each model. This ensures that our comparisons are fair and reflect real-world performance.

Why is my country not included in the regions?

We strive to include as many regions as possible, but availability of products and reliable pricing data can vary. If your country isn't listed, it may be due to a lack of consistent data or the products not being widely available there. We recommend checking back periodically as we work to expand our coverage. Change your region to view prices and details specific to your country.

Why is some of the data missing or incomplete?

We aim to provide the most accurate and up-to-date information, but sometimes data can be incomplete due to variations in product specifications across regions or lack of available information from manufacturers. If you notice missing data, please let us know so we can investigate and update our records accordingly.

Where can I buy the L40s Ultra?

We recommend buying directly from Dreame. Click on the "Buy from Dreame" button on the top of the page to go to the Dreame website for your region.

Features Glossary

Our quick guide to some of the features of the L40s Ultra and what they actually mean.

HyperStream
Two auto detangling brushes for deep cleaning on hard floors and carpet.
EasyLeap
Additional wheels help the robot climb single threshholds up to 22mm and two-tier threshholds up to 40mm.