Dreame L40 Ultra Gen 2
A low-cost full self-cleaning dock with edge-reaching brush and mops, for homes with mostly hard floors and few clutter hazards.
Amazon $569.98$569.98
The Dreame L40 Ultra Gen 2 is the better robot vacuum overall, rated 4.3 to 4.1. The Dreame D30 Ultra costs $29.99 less ($539.99 vs $569.98).
Dreame D30 Ultra
A low-cost self-cleaning dock for homes with mostly hard floors and no pets; pet owners should look at the L40s Ultra.
Amazon $539.99$539.99
Prices were last checked October 27, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
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 L40 Ultra Gen 2 | Dreame D30 Ultra |
|---|---|---|
| Overall rating | 4.3/5 | 4.1/5 |
| Cleaning 30% | 73 not yet tested; estimated from 12 tested Dreame robots and the median of the 70 tested robots | 48 measured 84% of sand from carpet, 61% of pet hair, some hair tangled (0.2) |
| Value 25% | 70 $570 | 74 $540 |
| Dock 20% | 94 Self-empties the bin, washes the mop, hot-water mop wash, hot-air mop drying | 100 Self-empties the bin, washes the mop, hot-water mop wash |
| 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 10.5 mm, extends to edges |
Independent tests
Dreame L40 Ultra Gen 2
No independent test published yet.
Dreame D30 Ultra
| Tested by | Carpet deep clean | Pet hair | Hair tangle (0 = none) | Area per charge | Conditions |
|---|---|---|---|---|---|
| Vacuum Wars | 84% | 61% | 0.2 | 1,831 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 L40 Ultra Gen 2 | Dreame D30 Ultra | |
|---|---|---|
| Vacuum | ||
| Claimed suction | 25,000 Pa | 25,000 Pa |
| Main brush | Rubber brush (TriCut brush optional) | Floating rubber brush with TriCut hair-cutting |
| Dustbin | 250 mL | 300 mL |
| Extending side brush | Yes | - |
| Mopping | ||
| Mop | Dual spinning pads, lifts 10.5 mm, extends to edges | Dual spinning pads, lifts 10.5 mm, extends to edges |
| Mop lift | 10.5 mm | 10.5 mm |
| Leaves mop at dock | No | - |
| Extending mop | Yes | Yes |
| Dock | ||
| Dock | Washes mop + empties | Washes mop + empties |
| Self-empties | Yes | Yes |
| Dust bag | 3.2 L | 3.2 L |
| Washes mop | Yes | Yes |
| Hot-water wash | Yes | Yes |
| Hot-air drying | Yes | - |
| Detergent dosing | No | - |
| Clean water tank | 4.5 L | 4.5 L |
| Navigation & app | ||
| Navigation | LiDAR + 3D light | LiDAR + 3D light |
| Obstacle avoidance | 3D structured light (3DAdapt) | Single-line laser |
| Climbs thresholds | 20 mm | 20 mm |
| Matter | Yes | - |
| Voice assistants | Alexa, Siri, Google Home | - |
| Build | ||
| Height | 3.8 in (97 mm) | 3.8 in (97 mm) |
| Retracting LiDAR | No | - |
| Battery | 5,200 mAh | 5,200 mAh |
| Run time | Up to 3 h 51 min | Up to 3 h 50 min |
| Weight | 8.8 lb (4 kg) | 8.6 lb (3.9 kg) |
| Warranty | 3 years | 3 years |
| Released | 2025-12 | - |