A CLOSER LOOKHome Appliances
More floor care. Less daily mop handling.
Dreame L40s Ultra
L40s Ultra · Black · US model
Buyer feedback ↓The black Dreame L40s Ultra combines vacuuming and spinning mops with a dock that empties dust and washes and dries the pads. Its extending brush and mop target edges, while the dual main brushes help manage hair.
- 19,000 PaMaximum rated suctionMaker specification, not a cleaning score
- 4.5 LClean-water tankDock reservoir≈ 1.2 US gallons
- 4 LDirty-water tankEmpty and rinse regularly≈ 1.1 US gallons
Amazon US · L40s Ultra · Black · US model · Retailer link
THE QUICK TAKE
Is it right for you?
Choose it if pet hair and hard-floor mopping create a daily chore. The dual brushes and reaching side brush are useful cleaning features, and the dock takes over much of the pad washing. Vacuum Wars found strong carpet pickup and hair handling in its own tests.
Choose another model if avoiding small objects is your main priority. Vacuum Wars found the Ultra less reliable around obstacles than the Ultra AE. You still need to clear cords, refill water, empty dirty water and clean the dock; this is less daily work, not a maintenance-free appliance.
01 / BUYING NOTES
Before you buy.
Two rollers do different jobs.
The main brush assembly combines a rubber-style roller with a bristled roller. Check the ends and bearings for trapped hair even though the design is intended to reduce tangles.
The dock needs care too.
The dock washes and dries the mop pads. Empty the dirty-water tank and rinse the wash area regularly; leaving dirty water sitting can undo much of the convenience.
Reaching the edge is not avoiding clutter.
The side brush and mop extend toward edges. Pick up loose cables and small objects first; edge reach and obstacle recognition are different abilities.
Dreame L40s Ultra specifications and care ↗ · Dreame model differences ↗ · Vacuum Wars three-model hands-on comparison ↗ · Exact black US L40s Ultra ↗
02 / AMAZON REVIEWS
The buyers’ view.
Black L40s Ultra owners report less daily cleaning work, including reduced dog hair and convenient scheduled runs. A dog owner still used a conventional vacuum for deeper cleaning and reported hair clogs despite regular maintenance.
Results were mixed: another owner still needed to sweep afterward and reported getting stuck and mop pads coming loose, with only middling mopping results. A separate owner reported significant tile damage during use.
What buyers like
- performance62
- cleaning performance54
- Value for money29
- mapping13
- self-cleaning12
- time-saving11
- convenience9
Mixed feedback
- tangling12
The small numbers are review mentions. Topics and sentiment are from Amazon’s customer-review overview.
Amazon US · Checked . Ratings may include other colors and sizes.
View source ↗03 / REVIEWS & VIDEO
See it in use.
See how it works, then read the findings behind the buying advice.
L40s Ultra, AE and CE tested side by side
Shows where the Ultra performs well and where the AE differs.
Watch on YouTube ↗
Three months of cleaning and maintenance
Useful for the routine work around the dock, pads and tanks.
Watch on YouTube ↗Video and written sources are labeled by creator and tested scope. Manufacturer demonstrations explain use; they are not independent tests. No in-house hands-on testing is claimed.
Read 2 written sources Product scope is labeled · key findings in bold
The Ultra cleaned embedded carpet debris well and resisted hair tangles in the studio tests. Its extending side brush helped at corners, but obstacle avoidance was weaker than the Ultra AE.
The Ultra has a dual main-brush system and an extending side brush. The AE uses a different brush setup and adds camera-based object recognition; the similar names do not mean the hardware is identical.
04 / COMPARE
Different priorities.
Choose the tradeoff that fits how you will use it.
Swipe to see every alternative →
THIS GUIDEDreame L40s UltraBlack · US model |  ALTERNATIVEDreame L40s Ultra AEBlack · US model |  ALTERNATIVERoborock Qrevo S5VBlack · US model | |
|---|---|---|---|
| Amazon price | $499.97 | $599.98 | $899.99 |
| Best for | Hair pickup and edge-reaching brushes | Better object avoidance in the cited test | A self-washing dock in the Roborock system |
| Design | Dual main brushes; extending side brush and mop | Camera-based recognition; different brush setup | Spinning pads and an extending mop arm |
| Care / use | Refill clean water; empty dirty water; clean dock | Similar tank and dock maintenance | Keep water tanks and wash tray clean |
| Consider | Obstacle avoidance trails the AE in cited testing | No extending side brush | Different app and brush system |
| Explore | Read buying guide →Amazon source ↗ | View on Amazon ↗ | View on Amazon ↗ |
About these everyday comparisons
Approximate comparisons to familiar objects: a bank card’s 3.37-inch long edge, a Letter sheet’s 11-inch long edge, or a US nickel’s 21.21 mm diameter / 5 g weight. Water comparisons exclude the container’s weight. Capacity comparisons describe volume, not exterior size or how food fits. Reference pictures identify the object; use the labeled ratio for the comparison.
05 / PRICE HISTORY
The price over time.
Dreame L40s Ultra · L40s Ultra · Black · US model · Amazon US
The chart legend identifies Amazon and new-offer prices when available. New offers can include marketplace sellers. Coupons, shipping and size/color selections can change the final price. Blank periods are missing observations, not a zero price.
06 / RELATED FINDS
A useful extra.
For the way you plan to use it.
Keep a spare bag for the dock
Dreame Replacement Dust Bags
Dreame explicitly lists the L40s Ultra among the compatible models. Replace a full bag according to the dock’s instructions so auto-emptying can continue.