# Dreame L40 Ultra

- Page: https://bestatbest.com/us/robot-vacuums/dreame-l40-ultra
- Not sold at any store we monitor today, so not in our ranking.
- No store we follow has this model in stock today.

## Our score

- Score 6.8 out of 10
- Lab tests, 60% of the score: 6.8, measured by Vacuum Wars.
- Owners’ ratings, 25%: 5.5, from 1,859 ratings averaging 4.1 stars at Amazon.
- Features, 15%: 8.9, 82 of the 92 points for the facts the maker states.
- Deep clean on carpet: 6.2
- Pet hair: 8.1
- Mopping: 5.9
- Obstacle avoidance: 6.4
- Navigation: 7.8
- Vacuum Wars: the test (read on September 29, 2026), https://youtu.be/51YlbWSDGDs
- Price does not count, so a discount never lifts a model. Only robots a lab has tested are ranked.

## The testers’ picks

- TechRadar: Best for pets (list as of September 25, 2026), https://www.techradar.com/home/robot-vacuums/best-robot-vacuum
- Vacuum Wars: Position 44 of 151 (list as of September 26, 2026), https://vacuumwars.com/vacuum-wars-best-robot-vacuums/

## Pros

- Handles pet and human hair very well, helped by its hair-cutting brush (TechRadar, https://www.techradar.com/home/robot-vacuums/dreame-l40-ultra-review)
- Side brush and one mop swing outward to reach right into corners (TechRadar, https://www.techradar.com/home/robot-vacuums/dreame-l40-ultra-review)
- Maps rooms quickly and accurately, and rides over loose rugs without snagging (TechRadar, https://www.techradar.com/home/robot-vacuums/dreame-l40-ultra-review)
- Clears debris from hard floors and carpet and cleans deep into carpet (Vacuum Wars, https://vacuumwars.com/dreame-l40-review/)
- Very frugal battery, among the best they have seen for runtime per charge (Vacuum Wars, https://vacuumwars.com/dreame-l40-review/)
- Mops dried stains well and can leave its pads in the dock for carpet runs (Vacuum Wars, https://vacuumwars.com/dreame-l40-review/)

## Cons

- The dock is very large and rather ugly (TechRadar, https://www.techradar.com/home/robot-vacuums/dreame-l40-ultra-review)
- May push or ride over small soft items like gloves and toys (TechRadar, https://www.techradar.com/home/robot-vacuums/dreame-l40-ultra-review)
- The app does not save a cleaning zone for later use (TechRadar, https://www.techradar.com/home/robot-vacuums/dreame-l40-ultra-review)
- The standard brush tangles badly with long hair, the optional cutting brush fixes that (Vacuum Wars, https://vacuumwars.com/dreame-l40-review/)
- The station squeaked a lot while washing the mop pads (Vacuum Wars, https://vacuumwars.com/dreame-l40-review/)
- Kept missing a longer pile rug on the test floor (Vacuum Wars, https://vacuumwars.com/dreame-l40-review/)

## Frequently asked questions about the Dreame L40 Ultra

**Does the Dreame L40 Ultra empty its own dust bin?**

Yes. The station empties the robot’s dust bin after every run. The 3.2 l dust bag in the station lasts up to 75 days, the maker says.

**Does the Dreame L40 Ultra wash and dry its own mop?**

Yes. The station washes the mop itself, with water at 149 °F (65 °C). It then dries the mop with warm air.

**Does the Dreame L40 Ultra work with Alexa, Google Home or Siri?**

It works with Alexa, Google Assistant and Siri. It does not support Matter.

**How high a threshold can the Dreame L40 Ultra climb?**

Thresholds up to 0.9 in (22 mm), the maker says. It has no climbing system for higher thresholds. Measure your own thresholds: the ones to a bathroom or balcony are often higher.

**Does the Dreame L40 Ultra fit under low furniture?**

The robot is 4.1 in (10.4 cm) tall, so it fits under furniture with at least 4.1 in of clearance.

**Is the Dreame L40 Ultra suitable for pet hair?**

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


---

This is the markdown version of https://bestatbest.com/us/robot-vacuums/dreame-l40-ultra: the same data, for readers that take a page in whole. Every product page and list has one, at its address plus ".md". Prices and ranks change every day: quote the date with them.