Dreame L40s Pro Ultra review
Dreame's mid-range with a fixed turret: 19,000 Pa, dual anti-tangle brushes, camera plus twin-laser 3D structured light, pads that lift, extend and detach, a 75 °C wash and 195 minutes on a charge.
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Review method: Specification analysis
Our verdict
The L40s Pro Ultra is the L40 line with the dock and the sensors of a dearer machine and a conventional 103.5 mm body. It vacuums at 19,000 Pa through the two-roller HyperStream brush, lifts the main brush, the side brush and the pads independently, extends the side brush and the pads 4 cm to reach edges, and leaves the pads in the dock when a carpet is on the plan. Its front end is an RGB camera backed by 3D structured light with two lasers, and it recognises bowls, litter boxes, people and pets. The dock washes at 75 °C through 20 nozzles, dries with hot air, doses detergent, refills from 4.5 litre tanks and empties for 100 days; the plumbing kit is sold separately. Four maps, a built-in voice command set, and 195 minutes of quiet vacuuming from 5,200 mAh round it out. The threshold is the usual 22 mm for one step, 40 mm only across two. Against the L50 Pro Ultra it gives up the retracting turret and 500 Pa for a little less money; the turret is the thing to decide on.
Pros
- Camera plus twin-laser 3D structured light, pets recognised
- Pads and both brushes lift; pads extend 4 cm and detach
- 75 °C wash, hot-air drying, detergent dosing, 100 days of dust
- Four maps and built-in voice commands
Cons
- 103.5 mm tall: no retracting turret
- 22 mm single-step threshold
- Plumbing kit costs extra
- No noise, charging time or robot tank size published
Best for
- Multi-floor homes that want four maps and a full dock at a mid-range price
- Homes with a pet whose bowls and litter box the robot should avoid
Not recommended for
- Low furniture below 10.5 cm
- Single-step sills above 2.2 cm
Score breakdown
- Cleaning
- 80 /100
- Navigation
- 73 /100
- Mopping
- 92 /100
- Obstacle Avoidance
- 100 /100
- Automation
- 90 /100
- Ease of Use
- 97 /100
- Reliability
- 64 /100
- Value
- 65 /100
In detail
Suction and brushes
The manufacturer rates the suction at 19,000 Pa. That is less than most of the 114 robot vacuums we list. The main brush is the tangle-resistant type, with one side brush. The onboard bin holds 310 ml.
Mopping
Mop system: twin spinning pads. For carpet runs it leaves the mop at the dock. The mop swings out to reach along walls.
Navigation and obstacles
It navigates by LiDAR and avoids obstacles with camera + depth sensor. It stores 4 floor plans. It climbs thresholds up to 22 mm. That is about the middle of the field. No-go zones can be drawn in the app. It recognises pet waste and steers round it.
The dock
The dock empties the bin, washes and dries the mop and refills the water tank. The dust bag lasts about 100 days.
Battery, charging and noise
One charge runs up to 3 h 15 min. The manufacturer publishes no noise figure.
YouTube reviews by other authors
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Specifications
Cleaning
- Suction
- 19,000 Pa
- Brush system
- Tangle-resistant
- Side brushes
- 1
- Carpet boost
- No
- Dustbin
- 310 ml
Navigation
- Mapping
- LiDAR
- Obstacle avoidance
- Camera + depth sensor
- Saved floor plans
- 4
- Threshold climb
- 22 mm
- Two-step threshold
- 40 mm over two steps with a gap of more than 3 cm (EasyLeap)
Mopping
- Mop type
- Twin spinning pads
- Mop lift
- Detaches for carpet
- Extending mop
- Yes
- Water tank
- Not published
- Mop reach
- Pads extend 4 cm; the side brush extends too
Dock
- Self-emptying
- Yes
- Mop washing
- Yes
- Mop wash temperature
- 75 °C
- Mop drying
- Yes
- Water refill
- Yes
- Plumbed drain
- No
- Dust bag interval
- 100 days
- Water tanks (clean / dirty)
- 4.5 l / 4.0 l
- Plumbing kit
- Optional, sold separately
- Dock size and weight
- 340 × 457 × 591 mm, 9 kg
Software
- No-go zones
- Yes
- Pet waste recognition
- Yes
Power
- Battery
- 5,200 mAh
- Runtime
- 3 h 15 min
- Charging time
- Not published
Connectivity
- Wi-Fi
- Yes
- Bluetooth
- No
- 4G / LTE
- No
- Voice control
- Yes
Physical
- Weight
- 4.23 kg
- L × W × H
- 350 × 350 × 104 mm
- Noise
- Not published
Support
- Warranty
- Not published
- Released
- Not published
Data source: Dreame PL product page, Dane techniczne block and footnotes, retrieved September 16, 2026
Where to buy
Prices are read every night from the manufacturers' shops that list the machine, and shown as read. A price no read has confirmed for several days is marked with the day it was last seen. Where a week or more of readings exists, the lowest we recorded in the last 30 days is stated as well. RoboVerdict may earn a commission when you buy through links on our site. This does not affect our rankings. As an Amazon Associate I earn from qualifying purchases.
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