Dreame L40s Ultra CE
A cheaper L40s with a full self-cleaning dock, for homes that want hands-off mopping on a budget and can live without hot-water washing.
Amazon $399.99$399.99
The Dreame L40s Ultra CE rates 4.4 among self-cleaning dock robot vacuums; the Dreame D20 Pro Plus rates 3.7 among vacuum and mop ones. The Dreame D20 Pro Plus costs $80.03 less ($319.96 vs $399.99).
Dreame D20 Pro Plus
A long-running self-emptying vacuum with obstacle avoidance for carpet-heavy homes on a budget; get a washing dock if you mop a lot.
Amazon $319.96$319.96
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 CE | Dreame D20 Pro Plus |
|---|---|---|
| Overall rating | 4.4/5 | 3.7/5 |
| Cleaning 30% | 73 not yet tested; estimated from 12 tested Dreame robots and the median of the 70 tested robots | 73 not yet tested; estimated from 12 tested Dreame robots and the median of the 70 tested robots |
| Value 25% | 92 $400 | 71 $320 |
| Dock 20% | 83 Self-empties the bin, washes the mop, hot-air mop drying | 44 Self-empties the bin |
| Navigation 15% | 85 LiDAR + 3D light | 85 LiDAR + 3D light |
| Mopping 10% | 76 Dual spinning pads, lifts 10.5 mm, extends to edges | 10 Static pad |
Specifications
| Dreame L40s Ultra CE | Dreame D20 Pro Plus | |
|---|---|---|
| Vacuum | ||
| Claimed suction | 13,000 Pa | 13,000 Pa |
| Main brush | TriCut brush | HyperStream DuoBrush |
| Dustbin | 320 mL | 500 mL |
| Extending side brush | No | Yes |
| Mopping | ||
| Mop | Dual spinning pads, lifts 10.5 mm, extends to edges | Static pad |
| Mop lift | 10.5 mm | - |
| Leaves mop at dock | No | No |
| Extending mop | Yes | No |
| 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 | No | No |
| Hot-air drying | Yes | No |
| Detergent dosing | No | No |
| Clean water tank | 4.5 L | - |
| Navigation & app | ||
| Navigation | LiDAR + 3D light | LiDAR + 3D light |
| Obstacle avoidance | Single-laser 3D structured light | Single-laser 3D structured light |
| Climbs thresholds | 20 mm | 20 mm |
| Voice assistants | Alexa, Siri, Google Assistant | Alexa, Siri, Google Home |
| Build | ||
| Height | 4.1 in (104 mm) | 3.8 in (96.5 mm) |
| Retracting LiDAR | No | No |
| Battery | 5,200 mAh | 5,200 mAh |
| Run time | Up to 4 h 20 min | Up to 4 h 45 min |
| Weight | 8.6 lb (3.9 kg) | 7.9 lb (3.6 kg) |
| Warranty | 3 years | 3 years |
| Released | 2025-08 | 2025-07 |