Dreame L40s Ultra AE
For buyers who want an AI camera for obstacle avoidance and remote viewing on a full self-cleaning dock; for carpet and pet hair, the plain L40s Ultra measured better.
Amazon $599.98$599.98
The Dreame L40s Ultra AE and the Yeedi S20 Infinity are evenly matched, rated 4.3 and 4.3. The Dreame L40s Ultra AE leads on value and navigation. The Yeedi S20 Infinity wins on cleaning and mopping. The Dreame L40s Ultra AE costs $200.01 less ($599.98 vs $799.99).
Yeedi S20 Infinity
A strong-cleaning bagless roller-mop robot from ECOVACS’ sister brand; good results in testing, but yeedi publishes few specs and sells it only on Amazon.
Amazon $799.99$799.99
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 AE for value ($600 vs $800) and navigation (LiDAR + camera vs LiDAR + 3D light).
- Choose the Yeedi S20 Infinity for cleaning (measured 89% of sand from carpet, 100% of pet hair, no hair tangled vs measured 85% of sand from carpet, 80.8% of pet hair, no hair tangled) and mopping (Roller, extends to edges vs Dual spinning pads, lifts 10.5 mm, extends to edges).
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 AE | Yeedi S20 Infinity |
|---|---|---|
| Overall rating | 4.3/5 | 4.3/5 |
| Cleaning 30% | 66 measured 85% of sand from carpet, 80.8% of pet hair, no hair tangled | 86 measured 89% of sand from carpet, 100% of pet hair, no hair tangled |
| Value 25% | 67 $600 | 50 $800 |
| Dock 20% | 100 Self-empties the bin, washes the mop, hot-water mop wash, hot-air mop drying, doses detergent | 100 Self-empties the bin, washes the mop, hot-water mop wash, hot-air mop drying, doses detergent |
| Navigation 15% | 100 LiDAR + camera | 85 LiDAR + 3D light |
| Mopping 10% | 76 Dual spinning pads, lifts 10.5 mm, extends to edges | 85 Roller, extends to edges |
Independent tests
Dreame L40s Ultra AE
| Tested by | Carpet deep clean | Pet hair | Hair tangle (0 = none) | Area per charge | Conditions |
|---|---|---|---|---|---|
| Vacuum Wars | 85% | 80.8% | 0 | 1,591 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). |
Yeedi S20 Infinity
| Tested by | Carpet deep clean | Pet hair | Hair tangle (0 = none) | Area per charge | Conditions |
|---|---|---|---|---|---|
| Vacuum Wars | 89% | 100% | 0 | 1,335 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 AE | Yeedi S20 Infinity | |
|---|---|---|
| Vacuum | ||
| Claimed suction | 19,000 Pa | 19,500 Pa |
| Main brush | Liftable rubber brush with TriCut hair-cutting | - |
| Dustbin | 395 mL | - |
| Extending side brush | No | - |
| Mopping | ||
| Mop | Dual spinning pads, lifts 10.5 mm, extends to edges | Roller, extends to edges |
| Mop lift | 10.5 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 | - |
| Washes mop | Yes | Yes |
| Hot-water wash | Yes | Yes |
| Hot-air drying | Yes | Yes |
| Detergent dosing | Yes | Yes |
| Clean water tank | 4.5 L | - |
| Navigation & app | ||
| Navigation | LiDAR + camera | LiDAR + 3D light |
| Obstacle avoidance | AI camera, recognises 120+ object types | AIVI 3D 3.0 Omni-Approach |
| Climbs thresholds | 20 mm | 24 mm |
| Voice assistants | Alexa, Google Assistant | Alexa, Google Assistant |
| Build | ||
| Height | 3.8 in (97 mm) | - |
| Battery | 5,200 mAh | - |
| Run time | Up to 3 h | - |
| Weight | 8.8 lb (4 kg) | - |
| Warranty | 3 years | 1 year |
| Released | 2025-08 | 2025-09 |