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 and the Roborock Qrevo 2 Pro are evenly matched, rated 4.3 and 4.2. The Roborock Qrevo 2 Pro wins on mopping. The Roborock Qrevo 2 Pro costs $20 less ($549.98 vs $569.98).
Roborock Qrevo 2 Pro
For mid-range buyers with rugs who want a full-service dock and automatic mop removal without paying flagship prices.
Amazon $549.98$549.98
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.
Which should you buy?
- Choose the Roborock Qrevo 2 Pro for 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 | Roborock Qrevo 2 Pro |
|---|---|---|
| Overall rating | 4.3/5 | 4.2/5 |
| Cleaning 30% | 73 not yet tested; estimated from 12 tested Dreame robots and the median of the 70 tested robots | 63 not yet tested; estimated from 19 tested Roborock robots and the median of the 70 tested robots |
| Value 25% | 70 $570 | 72 $550 |
| 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, 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 | 86 Dual spinning pads, leaves its mop at the dock for carpet, extends to edges |
Specifications
| Dreame L40 Ultra Gen 2 | Roborock Qrevo 2 Pro | |
|---|---|---|
| Vacuum | ||
| Claimed suction | 25,000 Pa | 20,000 Pa |
| Main brush | Rubber brush (TriCut brush optional) | DuoDivide dual anti-tangle main brush |
| Dustbin | 250 mL | - |
| Extending side brush | Yes | No |
| 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 | 15 mm |
| Leaves mop at dock | No | Yes |
| 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 | No | - |
| Clean water tank | 4.5 L | - |
| Navigation & app | ||
| Navigation | LiDAR + 3D light | LiDAR + 3D light |
| Obstacle avoidance | 3D structured light (3DAdapt) | Structured light (Reactive Tech) |
| Climbs thresholds | 20 mm | - |
| Matter | Yes | Yes |
| Voice assistants | Alexa, Siri, Google Home | Alexa, Google Assistant, Siri Shortcuts |
| Build | ||
| Height | 3.8 in (97 mm) | 3.8 in (97 mm) |
| Retracting LiDAR | No | No |
| Battery | 5,200 mAh | - |
| Run time | Up to 3 h 51 min | - |
| Weight | 8.8 lb (4 kg) | - |
| Warranty | 3 years | 1 year |
| Released | 2025-12 | 2026-07 |