Dreame L40s Ultra CE
A cheaper L40s with a full self-cleaning dock, for homes that want hands-off mopping on a budget and can live without hot-water washing.
Amazon $399.99$399.99
The Dreame L40s Ultra CE is the better robot vacuum overall, rated 4.4 to 4.2. The Dreame L40s Ultra CE leads on value. The Dreame L40s Ultra CE costs $500 less ($399.99 vs $899.99).
Roborock Qrevo S5V
For carpet and pet homes that want strong deep cleaning from a self-cleaning robot without camera features; shop around, as the CurvX often costs less.
Amazon $899.99$899.99
Prices were last checked October 26, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the Dreame L40s Ultra CE for value ($400 vs $900).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every self-cleaning dock robot vacuum; a clear win is highlighted. How we rank explains each one.
| Factor weight | Dreame L40s Ultra CE | Roborock Qrevo S5V |
|---|---|---|
| Overall rating | 4.4/5 | 4.2/5 |
| Cleaning 30% | 73 not yet tested; estimated from 12 tested Dreame robots and the median of the 70 tested robots | 89 measured 92% of sand from carpet, 92% of pet hair, no hair tangled |
| Value 25% | 92 $400 | 42 $900 |
| Dock 20% | 83 Self-empties the bin, washes the mop, hot-air mop drying | 100 Self-empties the bin, washes the mop, hot-air mop drying |
| Navigation 15% | 85 LiDAR + 3D light | 85 LiDAR + 3D light |
| Mopping 10% | 76 Dual spinning pads, lifts 10.5 mm, extends to edges | 76 Dual spinning pads, lifts 10 mm, extends to edges |
Independent tests
Dreame L40s Ultra CE
No independent test published yet.
Roborock Qrevo S5V
| Tested by | Carpet deep clean | Pet hair | Hair tangle (0 = none) | Area per charge | Conditions |
|---|---|---|---|---|---|
| Vacuum Wars | 92% | 92% | 0 | 1,160 sq ft | Embedded sand in medium-pile carpet; flattened 2.5 in pet hair on carpet, two runs; 7 in hair tangle on hard floor (0 = none wrapped). |
Specifications
| Dreame L40s Ultra CE | Roborock Qrevo S5V | |
|---|---|---|
| Vacuum | ||
| Claimed suction | 13,000 Pa | 12,000 Pa |
| Main brush | TriCut brush | rubber floating brush |
| Dustbin | 320 mL | - |
| Extending side brush | No | No |
| Mopping | ||
| Mop | Dual spinning pads, lifts 10.5 mm, extends to edges | Dual spinning pads, lifts 10 mm, extends to edges |
| Mop lift | 10.5 mm | 10 mm |
| Leaves mop at dock | No | No |
| Extending mop | Yes | Yes |
| Dock | ||
| Dock | Washes mop + empties | Washes mop + empties |
| Self-empties | Yes | Yes |
| Dust bag | 3.2 L | 2.7 L |
| Washes mop | Yes | Yes |
| Hot-water wash | No | - |
| Hot-air drying | Yes | Yes |
| Detergent dosing | No | - |
| Clean water tank | 4.5 L | - |
| Navigation & app | ||
| Navigation | LiDAR + 3D light | LiDAR + 3D light |
| Obstacle avoidance | Single-laser 3D structured light | Structured light |
| Climbs thresholds | 20 mm | 20 mm |
| Voice assistants | Alexa, Siri, Google Assistant | Alexa, Google Assistant, Siri Shortcuts |
| Build | ||
| Height | 4.1 in (104 mm) | - |
| Retracting LiDAR | No | No |
| Battery | 5,200 mAh | 5,200 mAh |
| Run time | Up to 4 h 20 min | - |
| Weight | 8.6 lb (3.9 kg) | - |
| Warranty | 3 years | 1 year |
| Released | 2025-08 | 2025-07 |