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Dreame L40 Ultra Gen 2 review

No. 3 of 10 in our robot vacuums ranking · Updated · How we rank

Our verdict: The Dreame L40 Ultra Gen 2 ranks 3rd of the 10 robot vacuums we compare, with 8.4 out of 10.

Dreame L40 Ultra Gen 2

8.4/10

The Dreame L40 Ultra Gen 2 is a robot vacuum and mop with a dock that empties dust, washes the pads and dries them. It suits homes with carpet and hard floor that want little upkeep and can live with weak obstacle avoidance.

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Why it's here

  • Mop pads lift about 0.4 inches when carpet is detected
  • Extendable side brush and mop reach corners and edges
  • Dock empties dust, washes mops and dries them
  • Works with Siri and Google Home voice control

Keep in mind

  • Dock is loud while it empties and dries
  • Cleaning solution is sold separately
  • Sticky dried spills can take more than one pass

What the review sites say

Named in 1 of the 3 best-of lists we read: The Verge.

Why the Dreame L40 Ultra Gen 2 scores 8.4

Each bar shows where it places among the 10 robot vacuums in this guide, so a full bar is 1st of 10. What the review sites say counts for most of the score.

  • What review sites say4th of 10
  • How happy owners are4th of 10
  • How new it is5th of 10

Level with the Dreame X60 Max Ultra Complete

The Dreame X60 Max Ultra Complete and the Dreame L40 Ultra Gen 2 score the same, so either is a safe pick. The Dreame X60 Max Ultra Complete goes first because it does a little better with the review sites. The Dreame L40 Ultra Gen 2 leaves owners a little happier.

About the Dreame L40 Ultra Gen 2

The L40 Ultra Gen 2 pairs a 25,000 Pa suction rating with two spinning mop pads. When it detects carpet, the pads lift about 0.4 inches (10 mm) off the floor. The app can also keep it off carpet altogether. A TriCut roller handles hair, and an extendable side brush and mop reach out toward corners and edges.

The dock does most of the chores. It empties the dust bin into a disposable bag, which Dreame rates at 100 days of auto-empty. It also washes the mop pads and dries them with hot air. Refilling the water tank and fast charging are handled there too.

Navigation uses 3D structured light and LDS sensing. The app has no-go and no-mop zones, carpet avoidance and water-flow settings. It works with Siri, Google Home and Alexa, and supports Matter. A battery of 5,200 mAh gives an estimated 1,290 square feet per charge, according to Vacuum Wars. The cleaning solution dispenser is an accessory sold separately.

What owners report about the Dreame L40 Ultra Gen 2

We found little owner feedback written about this exact model. The forum threads and retailer pages we could open carried no long-term owner reports, so what follows leans on early impressions and published reviews.

The early reports are mixed on navigation. Reviews that gather buyer impressions say mapping and routing are good, and that the machine rarely gets stuck. Those same summaries say it can miss thin cables and floor mats and struggle with taller thresholds. One forum commenter said the older L40 Ultra handles obstacles better than this one.

Praise centers on suction, edge reach and the dock, which cuts hands-on upkeep. The app is described as easy to set up but plainer than Roborock's. Long-term durability is unknown: the model is new, and no source we read had months of use to report.

Who the Dreame L40 Ultra Gen 2 suits

The L40 Ultra Gen 2 fits a home with a mix of carpet and hard floors where you want the dock to handle emptying, mop washing and drying. Pet owners with embedded carpet hair are the group reviewers point to. The dock is tall, so check your clearance.

Look elsewhere if your floors collect cords, socks or pet waste. Vacuum Wars found its obstacle avoidance very poor, and long hair wrapped around the brush. A home with long-haired pets or a lot of loose items may prefer the Dreame X60 Max Ultra Complete or the Roborock Qrevo Curv 2 Flow.

Questions about the Dreame L40 Ultra Gen 2

What's the difference between the Dreame L40 Ultra Gen 2 and the L40s Ultra?

The Gen 2 is rated at 25,000 Pa, the highest in the L40 line. It has a smaller dust bin and a lower estimated coverage per charge, about 1,290 square feet against about 1,537 for the L40s Ultra, per Vacuum Wars. That review also found it picked up less pet hair.

What's the difference between the Dreame L40 Ultra Gen 1 and Gen 2?

Gen 2 has stronger suction and an extendable side brush and mop. Vacuum Wars found its obstacle avoidance far weaker than the original's, which used a camera-assisted system. The Gen 2 uses 3D structured light and LDS sensing instead.

How long does the Dreame L40 Ultra Gen 2 battery last?

It has a 5,200 mAh battery. Vacuum Wars estimates about 1,290 square feet of cleaning per charge. Another spec listing gives 194 minutes of runtime, which Dreame's page does not confirm.

Does the Dreame L40 Ultra Gen 2 come with cleaning solution?

No. The cleaning solution dispenser is an accessory sold separately, so the dock washes pads with water unless you add it.

Can the Dreame L40 Ultra Gen 2 mop carpet?

No, it avoids wetting carpet. The mop pads lift about 0.4 inches when carpet is detected, and the app can also set it to avoid carpets entirely.

Other robot vacuum picks

The other badge winners in our robot vacuums ranking.

All 10 robot vacuums, compared

  1. 1 eufy Omni C28Best Choice 8.8 Check Price
  2. 2 Dreame X60 Max Ultra CompleteBest Premium 8.4 Check Price
  3. 3 Dreame L40 Ultra Gen 2This review 8.4 Check Price
  4. 4 Roborock Qrevo Curv 2 Flow 8.4 Check Price
  5. 5 eufy Omni E25 8.3 Check Price
  6. 6 iRobot Roomba Max 775X Combo Robot + AutoWash Dock 8.1 Check Price
  7. 7 MOVA P50 Pro Ultra 8.0 Check Price
  8. 8 iRobot Roomba 105 Vac Robot + AutoEmpty Dock 7.9 Check Price
  9. 9 Roborock Q7 M5+Best Budget 7.9 Check Price
  10. 10 Shark PowerDetect 2-in-1 Robot Vacuum and Mop with NeverTouch Pro Base AV2800ZE 7.9 Check Price
See the full robot vacuums ranking

The Dreame L40 Ultra Gen 2 on Amazon

Dreame L40 Ultra Gen 2

The Dreame L40 Ultra Gen 2 is a robot vacuum and mop with a dock that empties dust, washes the pads and dries them. 8.4 out of 10.

Check Price on Amazon

How we score it

Every score here comes from our ranking model; no editor sets the order. Most of each score is what the review sites say: the scores their own reviews give each model, and whether their best-of lists name it. For this guide we read CNET, Homes & Gardens, TechRadar, The Verge, Tom's Guide and Wired. The rest is how happy owners are, held back where few owners have rated a product, and how new it is. Value for money earns its own badge rather than a higher place. We compared 17 models for this guide before settling on these ten.

Brands can't pay to be included or to move up. We last checked these picks in October 2026.

How we rank, in full

Where these facts come from