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 $499.98$499.98
The Dreame L40 Ultra Gen 2 is the better robot vacuum overall, rated 4.3 to 3.9. The Dreame L40 Ultra Gen 2 leads on value. The Dreame X40 Ultra wins on navigation and mopping. The Dreame L40 Ultra Gen 2 costs $90.01 less ($499.98 vs $589.99).
Dreame X40 Ultra
Dreame’s 2024 flagship, now hard to find new; worth it only at a deep discount, as the X50 and L-series robots clean better.
Amazon $589.99$589.99
Prices were last checked November 2, 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 L40 Ultra Gen 2 for value ($500 vs $590).
- Choose the Dreame X40 Ultra for navigation (LiDAR + camera vs LiDAR + 3D light) and mopping (Dual spinning pads, leaves its mop at the dock for carpet, 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 L40 Ultra Gen 2 | Dreame X40 Ultra |
|---|---|---|
| Overall rating | 4.3/5 | 3.9/5 |
| Cleaning 30% | 73 not yet tested; estimated from 12 tested Dreame robots and the median of the 70 tested robots | 37 measured 80% of sand from carpet, 75.5% of pet hair, some hair tangled (0.8) |
| Value 25% | 78 $500 | 68 $590 |
| Dock 20% | 94 Self-empties the bin, washes the mop, hot-water mop wash, hot-air mop drying | 90 Self-empties the bin, washes the mop, hot-water mop wash, hot-air mop drying, doses detergent |
| Navigation 15% | 85 LiDAR + 3D light | 100 LiDAR + camera |
| Mopping 10% | 76 Dual spinning pads, lifts 10.5 mm, extends to edges | 86 Dual spinning pads, leaves its mop at the dock for carpet, extends to edges |
Independent tests
Dreame L40 Ultra Gen 2
No independent test published yet.
Dreame X40 Ultra
| Tested by | Carpet deep clean | Pet hair | Hair tangle (0 = none) | Area per charge | Conditions |
|---|---|---|---|---|---|
| Vacuum Wars | 80% | 75.5% | 0.8 | 1,287 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 X40 Ultra | |
|---|---|---|
| Vacuum | ||
| Claimed suction | 25,000 Pa | 12,000 Pa |
| Main brush | Rubber brush (TriCut brush optional) | Liftable rubber brush (TriCut Brush 2.0 sold separately) |
| Dustbin | 250 mL | 300 mL |
| Extending side brush | Yes | Yes |
| Mopping | ||
| Mop | Dual spinning pads, lifts 10.5 mm, extends to edges | Dual spinning pads, leaves its mop at the dock for carpet, extends to edges |
| Mop lift | 10.5 mm | 10.5 mm |
| Leaves mop at dock | No | Yes |
| Extending mop | Yes | Yes |
| Water tank | - | 80 mL |
| 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 | Yes |
| Detergent dosing | No | Yes |
| Water hookup option | - | No |
| Clean water tank | 4.5 L | 4.5 L |
| Navigation & app | ||
| Navigation | LiDAR + 3D light | LiDAR + camera |
| Obstacle avoidance | 3D structured light (3DAdapt) | RGB camera plus 3D structured light, recognises 120 object types |
| Climbs thresholds | 20 mm | 22 mm |
| Matter | Yes | - |
| Voice assistants | Alexa, Siri, Google Home | Alexa, Siri, Google Home |
| Build | ||
| Height | 3.8 in (97 mm) | - |
| Retracting LiDAR | No | - |
| Battery | 5,200 mAh | 6,400 mAh |
| Run time | Up to 3 h 51 min | - |
| Weight | 8.8 lb (4 kg) | - |
| Warranty | 3 years | 3 years |
| Released | 2025-12 | 2024-04 |