Dreame L40s Ultra

Name: Dreame L40s Ultra
Brand: Dreame
SKU: 8910

Manufacturer: Dreame

The Dreame L40s Ultra is a fully autonomous robot vacuum cleaner designed to handle a wide range of floor types without manual intervention. It combines vacuuming and mopping in a single unit, and its self-emptying docking station means the dustbin can go roughly 100 days between manual empties. The robot supports scheduling, virtual barriers, no-go zones, and smartphone remote control, and it works with both Google Assistant and Amazon Alexa for voice-based operation.

On the technical side, the L40s Ultra delivers 19000 Pa of suction power across four cleaning modes, backed by a 5200 mAh battery that provides up to 160 minutes of runtime per charge, with a full recharge taking around four hours. It carries a HEPA filter alongside an allergy filter and an electrostatic filtration system, and its washable filters are included in the box. The robot automatically raises its mop when carpet is detected, and the docking station handles mop cleaning and drying. Weighing 4230 g with a 350 mm footprint and a low 103.5 mm profile, it also features anti-fall and anti-stuck sensors along with automatic height adjustment for navigating different surfaces.

Pros

With 19000 Pa of suction and four cleaning modes, the robot handles vacuuming across all floor types in a single pass
The docking station takes care of mop cleaning and drying automatically, removing a common maintenance step from the user's routine
A 5200 mAh battery supports up to 160 minutes of continuous runtime, allowing it to cover larger areas before needing to recharge
The estimated 100-day bin-empty cycle means the dustbin rarely needs manual attention
Mapping, no-go zones, virtual barriers, and route mapping give users detailed control over where and how the robot cleans
Both HEPA and allergy filters are included, along with an electrostatic filtration system, providing multiple layers of air filtration during operation

Cons

At 63 dB during operation, the noise level may be noticeable in quieter home environments
The robot lacks a dirt sensor, so it cannot automatically detect and prioritize heavily soiled areas
There is no overheating indicator, providing no on-device alert if the unit runs hot
The dustbin capacity of 0.32 l is relatively small for the robot itself, even though the docking station handles emptying
A full recharge takes four hours, which could be a limitation if the battery is depleted mid-clean in a large home
The unit has no physical remote control, so all direct control must go through the smartphone app

Who is this for?

This robot vacuum is well suited to households with mixed flooring, where the ability to clean all floor types combined with automatic mop raising on carpet detection removes the need for manual intervention between surfaces. Larger homes benefit particularly from the 160-minute runtime and 100-day estimated bin-empty cycle, which keep cleaning sessions long and maintenance infrequent. Users who want detailed control over their cleaning routines will also find value here, as the support for no-go zones, virtual barriers, scheduling, and smartphone control provides a high degree of customization without requiring constant hands-on involvement.

Who is this NOT for?

Users in noise-sensitive environments — such as those with young children napping or people working from home in quiet settings — may find the 63 dB operating noise level disruptive during cleaning cycles. The robot is also less suited to households where heavily soiled areas need targeted attention, since the absence of a dirt sensor means it cannot automatically identify and prioritize those spots. Additionally, users who prefer managing their devices without a smartphone or app will face limitations, as there is no physical remote control and all direct interaction depends on a connected device.

General info:

has HEPA filter	✓
audible noise	63 dB
has an allergy filter	✓
compatible with Google Assistant	✓
works with Alexa	✓
weight	4230 g
width	350 mm
height	103.5 mm
thickness	350 mm
volume	12678.75 cm³
warranty period	1 years
estimated empty time	100 days
docking station size	91829.58 cm³

The Dreame L40s Ultra measures 350 mm in width and 103.5 mm in height, weighing 4230 g, with an overall unit volume of 12678.75 cm³ and a considerably larger docking station footprint of 91829.58 cm³. It includes both a HEPA filter and an allergy filter, making it suitable for households that require thorough air filtration during cleaning. Noise output is rated at 63 dB during operation, and the estimated empty time of 100 days means the dustbin rarely needs manual attention. The robot is compatible with Google Assistant and Amazon Alexa for voice control, and it comes with a one-year warranty.

Features:

has mapping	✓
supports no-go zones	✓
supports a remote smartphone	✓
has an obstacle sensor	✓
has problem area cleaning	✓
is self-emptying	✓
has carpet detection	✓
doesn't get stuck	✓
supports virtual barriers	✓
has route mapping	✓
Has voice prompts	✓
auto docking	✓
has anti-fall sensor	✓
can be scheduled	✓
has a remote control	✕
has water level adjustment	✓
supports Wi-Fi	✓
has mop cleaning	✓
has mop raising	✓
has mop drying	✓

The L40s Ultra comes equipped with a comprehensive set of navigation and cleaning features, including mapping, route mapping, obstacle detection, an anti-fall sensor, and anti-stuck functionality to keep cleaning sessions running without interruption. Users can define no-go zones and virtual barriers, schedule cleaning sessions, and control the robot remotely via smartphone over Wi-Fi — though a dedicated physical remote control is not included. Self-emptying and auto-docking are both supported, and the robot provides voice prompts throughout operation. On the mopping side, it offers water level adjustment, mop raising when carpet is detected, and the docking station handles both mop cleaning and mop drying, covering the full maintenance cycle automatically. Problem area cleaning is also supported, allowing the robot to give extra attention to particularly dirty spots.

Design:

dustbin capacity	0.32 l
Has a display	✕
has twin side brushes	✕
has included washable filters	✓
automatically adjusts its height	✓
Indicates when full	✕
uses bags	✓

The L40s Ultra has a dustbin capacity of 0.32 l and uses bags for dust collection, though it does not include a bag-full indicator. Washable filters are included in the box, helping to reduce ongoing maintenance costs. The robot automatically adjusts its height to accommodate different floor surfaces, but it does not feature twin side brushes and has no built-in display on the unit itself.

Cleaning power:

suction power	19000 Pa
cleans all floor types	✓
cleaning modes	4
mops	✓
has a dirt sensor	✕
Has an electrostatic filtration system	✓
has UV light	✕

The L40s Ultra delivers 19000 Pa of suction power and is capable of cleaning all floor types across four available cleaning modes. It also mops, making it a combined vacuuming and mopping unit. Filtration is handled through an electrostatic filtration system, though the robot does not include a dirt sensor or UV light functionality.

Power:

battery power	5200 mAh
runtime	160 min
charge time	4 hours
operating power consumption	38W
Has an overheating indicator	✕
has a removable battery	✕
has auto-off	✓

The L40s Ultra is powered by a 5200 mAh battery that provides up to 160 minutes of runtime per charge, with a full recharge taking approximately four hours. Operating power consumption is rated at 38W, and the robot includes an auto-off function to conserve energy when not in use. The battery is not removable, and the unit does not feature an overheating indicator.

Final Verdict

The Dreame L40s Ultra is a well-specified robot vacuum that covers the full cleaning cycle — vacuuming, mopping, and post-clean maintenance — with minimal user involvement. Its self-emptying docking station with mop cleaning and drying, combined with 19000 Pa suction and a 160-minute runtime, make it a capable option for larger homes with varied flooring. Some practical limitations exist, including a 63 dB noise level and the absence of a dirt sensor or physical remote, but these are relatively minor trade-offs given the breadth of automation on offer. For households looking to reduce hands-on cleaning time across multiple floor types, the L40s Ultra presents a technically thorough and largely autonomous solution.