Dreame L40s Ultra
The value pick of Dreame’s range: strong measured carpet cleaning, long runtime and a full self-cleaning dock for about half the flagship price.
Amazon $499.97$499.97
The Dreame L40s Ultra rates 4.6 among self-cleaning dock robot vacuums; the Dreame D20 Plus rates 3.8 among vacuum and mop ones. The Dreame D20 Plus costs $189.98 less ($309.99 vs $499.97).
Dreame D20 Plus
For carpeted homes on a budget that want long runs and a self-emptying dock; skip it if you need real mopping or obstacle avoidance.
Amazon $309.99$309.99
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.
Scores side by side
These two sit in different type classes (self-cleaning dock and vacuum and mop), and each is scored against the reference points for its own class, so a rating says how well each does among its own type peers. How we rank explains each factor.
| Factor weight | Dreame L40s Ultra | Dreame D20 Plus |
|---|---|---|
| Overall rating | 4.6/5 | 3.8/5 |
| Cleaning 30% | 88 measured 92% of sand from carpet, 91% of pet hair, no hair tangled | 91 measured 93% of sand from carpet, 91% of pet hair, no hair tangled |
| Value 25% | 78 $500 | 73 $310 |
| Dock 20% | 100 Self-empties the bin, washes the mop, hot-water mop wash, hot-air mop drying, doses detergent | 44 Self-empties the bin |
| Navigation 15% | 85 LiDAR + 3D light | 65 LiDAR |
| Mopping 10% | 86 Dual spinning pads, leaves its mop at the dock for carpet, extends to edges | 10 Static pad |
Independent tests
Dreame L40s Ultra
| Tested by | Carpet deep clean | Pet hair | Hair tangle (0 = none) | Area per charge | Conditions |
|---|---|---|---|---|---|
| Vacuum Wars | 92% | 91% | 0 | 1,538 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). |
Dreame D20 Plus
| Tested by | Carpet deep clean | Pet hair | Hair tangle (0 = none) | Area per charge | Conditions |
|---|---|---|---|---|---|
| Vacuum Wars | 93% | 91% | 0 | 2,761 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 | Dreame D20 Plus | |
|---|---|---|
| Vacuum | ||
| Claimed suction | 19,000 Pa | 13,000 Pa |
| Main brush | HyperStream Detangling DuoBrush (bristled rubber brush plus TPU rubber brush) | HyperStream Detangling DuoBrush (bristled rubber brush plus TPU rubber brush) |
| Dustbin | 310 mL | 500 mL |
| Extending side brush | Yes | - |
| Mopping | ||
| Mop | Dual spinning pads, leaves its mop at the dock for carpet, extends to edges | Static pad |
| Mop lift | 10.5 mm | - |
| Leaves mop at dock | Yes | - |
| Extending mop | Yes | - |
| Water tank | - | 350 mL |
| Dock | ||
| Dock | Washes mop + empties | Self-empty |
| Self-empties | Yes | Yes |
| Dust bag | 3.2 L | 5 L |
| Washes mop | Yes | No |
| Hot-water wash | Yes | No |
| Hot-air drying | Yes | No |
| Detergent dosing | Yes | No |
| Clean water tank | 4.5 L | - |
| Navigation & app | ||
| Navigation | LiDAR + 3D light | LiDAR |
| Obstacle avoidance | 3DAdapt structured-light obstacle avoidance | - |
| Climbs thresholds | 40 mm | - |
| Voice assistants | Alexa, Google Assistant | Alexa, Siri, Google Home |
| Build | ||
| Height | 3.8 in (97 mm) | 3.8 in (96.5 mm) |
| Battery | 5,200 mAh | 5,200 mAh |
| Run time | Up to 3 h 40 min | Up to 4 h 45 min |
| Weight | 9 lb (4.1 kg) | 7.7 lb (3.5 kg) |
| Warranty | 3 years | 3 years |
| Released | 2025-08 | - |