Robot vacuums / Compare

Dreame L40s Ultra vs Roborock Qrevo CurvX

A

Product A: Dreame

L40s Ultra

65 of 89 known

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B

Product B: Roborock

Qrevo CurvX

68 of 89 known

Change Roborock Qrevo CurvX

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Every value links to where we found it.

Only differences

ADreame L40s Ultra

BRoborock Qrevo CurvX

General

6 of 7 differ

Series

L Series1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Listed in the L Series menu of the Dreame US store. The L40s family has three models, L40s Ultra, Ultra AE and Ultra CE, with different hardware

Qrevo Curv2Maker product pageglobal.roborock.com/pages/roborock-qrevo-curv-seriesRead 14 October 2026The Qrevo CurvX is listed on the maker's Qrevo Curv Series page and the US FAQ compares it with the Qrevo Curv

Model numbersiMaker identifiers for this exact model and its listed variants. Excludes sibling models and other generations.

RLL22SE, 010204AA000742, 010204AA0008231Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026US store SKUs 010204AA000742 (White) and 010204AA000823 (Black). RLL22SE is the robot model code from SmartHomeCompared and a reseller copy of the user manual. No maker page states it8Spec databasesmarthomecompared.com/robot-vacuums/dreame-l40s-ultraRead 15 October 2026SmartHomeCompared lists Model RLL22SE and Launch Year 2025

RRE0VIS, RR-QrevoCurvX0-M1, RRFR-QrevoCurvX0-M1, RRPL-QrevoCurvX0-M11Maker product pageus.roborock.com/products/roborock-qrevo-curv-xRead 14 October 2026US store SKU RR-QrevoCurvX0-M1 in the store product data. RRE0VIS is the robot model in the manual. The French and Polish store SKUs are RRFR-QrevoCurvX0-M1 and RRPL-QrevoCurvX0-M1. A Galaxus part code QRCX02 was not opened3Maker product pagefr.roborock.com/products/roborock-qrevo-curvxRead 14 October 2026French store SKU RRFR-QrevoCurvX0-M14Maker product pagepl.roborock.com/products/roborock-qrevo-curvxRead 14 October 2026Polish store SKU RRPL-QrevoCurvX0-M15Owner's manualcdn.shopify.com/s/files/1/0082/3666/2902/files/Roborock_Qrevo_CurvX_FCC_User_Manual.pdfRead 14 October 2026FCC/IC statement and Basic Parameters (page 15): robot model RRE0VIS, dock EWFD38LRR

GTIN / EAN

00850070805063, 008500708050701Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Barcodes 00850070805063 (White) and 00850070805070 (Black) in the US store variant data

0195043007533, 69369059027951Maker product pageus.roborock.com/products/roborock-qrevo-curv-xRead 14 October 2026US store barcode 0195043007533. The French and Polish store data both show barcode 69369059027953Maker product pagefr.roborock.com/products/roborock-qrevo-curvxRead 14 October 2026French store barcode 69369059027954Maker product pagepl.roborock.com/products/roborock-qrevo-curvxRead 14 October 2026Polish store barcode 6936905902795, the same as the French store

AnnouncediThe maker's first announcement of this model. This is separate from first retail availability.

13 August 20252Press releasedreametech.com/blogs/news/dreame-l40s-series-robot-vacuum-launchRead 15 October 2026Article date 2025-08-13

Not available

Status

Available2Press releasedreametech.com/blogs/news/dreame-l40s-series-robot-vacuum-launchRead 15 October 2026Sold at the Dreame US store and Amazon in October 2026

Available1Maker product pageus.roborock.com/products/roborock-qrevo-curv-xRead 14 October 2026US store lists it for sale on 2026-10-14. Vacuum Wars and Amazon also list it in stock

PredecessoriThe model this one directly replaced, in the same line, tier and size, as the maker or a trusted review names it.

Not available

Not available

SuccessoriThe model that directly replaced this one, in the same line, tier and size. A revision such as a Slim or OLED model does not count when a next generation exists.

Not available

Not available

Launch price (US)iThe maker's US launch MSRP for the stated configuration, excluding tax. Current store prices and later discounts do not qualify.

$1,399.991Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026US store regular price $1,399.99, sale price $569.99. Excludes tax2Press releasedreametech.com/blogs/news/dreame-l40s-series-robot-vacuum-launchRead 15 October 2026L40s Ultra MSRP $1,399.99. L40s Ultra AE $1,099.99 and CE $899.99

$1,499.991Maker product pageus.roborock.com/products/roborock-qrevo-curv-xRead 14 October 2026Store shows an original price of $1,499.99 and a current price of $1,199.99. 9to5Toys calls the $1,500 price the brand's MSRP. Excludes tax12Press article9to5toys.com/2025/10/23/roborock-qrevo-curvx-robot-vac-mop-950Read 14 October 2026Article says the robot normally carries a $1,500 MSRP directly from the brand. The US store crossed-out price is $1,499.99

Launch price (EU)iThe maker's euro launch price for the stated configuration, including VAT as published. Current store prices and later discounts do not qualify.

Not available

€1,19910Spec databaseinside-digital.de/saug-wisch-roboter-vergleich/roborock-qrevo-curvx/roborock-saros-20-sonicRead 14 October 2026UVP 1,199.00 EUR for Germany, includes VAT. The French store crosses out 1,299 EUR, which is not a German price11Press articlenextpit.de/news/neuer-ansatz-von-roborock-so-sieht-die-zukunft-von-saugrobotern-ausRead 14 October 2026Article of 2025-06-23: the price of the Roborock Qrevo CurvX is 1,199 EUR

MarketsiISO country or region codes where this exact model or variant is sold. A source page's language does not establish availability.

US1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026US store

US, DE, FR, PL1Maker product pageus.roborock.com/products/roborock-qrevo-curv-xRead 14 October 2026Roborock US, French and Polish stores. Germany from the German launch coverage

ColoursiThe maker's own colour names

White, Black1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Variant options White and Black

White13Retailer pageauchan.fr/roborock-robot-aspirateur-laveur-qrevo-curvx-white/pr-3a4eac5f-29e6-45ed-92d2-03e0df22ceb5Read 14 October 2026Listed as the white model, the product name ends in white

Suction and brushes

8 of 13 differ

Max suction (claimed)iThe maker's highest suction pressure claim in pascals. Each maker measures it in its own lab, so figures from different brands are not directly comparable. A claim such as "175x more suction" is not converted. A maker can claim another figure in another market, such as Roborock in the US, so it is per variant.

19,000Pa1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 202619,000Pa Vormax suction, in-house lab data

22,000Pa1Maker product pageus.roborock.com/products/roborock-qrevo-curv-xRead 14 October 202622,000 Pa HyperForce suction, internal maker test in Max+ mode with a full battery

Suction power (claimed)iThe maker's suction power claim in air watts. Few robot makers publish it. Pascals are a different measure and go in Max suction.

Not available

Not available

Main brushesiNumber of main brush rolls under the robot. One roll split into two halves counts as one, and so do two cones tip to tip on one axis. Two rolls that turn against each other count as two.

21Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026The HyperStream Detangling DuoBrush has two rolls, a bristled rubber brush and a TPU rubber brush. The maker's comparison blog calls them counter-rotating rollers

15Owner's manualcdn.shopify.com/s/files/1/0082/3666/2902/files/Roborock_Qrevo_CurvX_FCC_User_Manual.pdfRead 14 October 2026Parts list item A2-6 lists Main Brushes in the plural, which are the two halves of the DuoDivide brush. Vacuum Wars lists a single brush roll7Measurementvacuumwars.com/compare/robot-vacuums/roborock_qrevo_curvxRead 14 October 2026Brush Roll: DuoDivide Brush, one split roll8Reviewvacuumwars.com/roborock-qrevo-curvx-reviewRead 14 October 2026DuoDivide main brush that channels hair to the center

Main brush materialiMaterial of the main brush rolls. Rubber covers rubber blades and fins.

Rubber and bristle1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Rubber brush with bristles plus a TPU all-rubber brush

Not available

Main brush (as published)iThe maker's name for the main brush, such as "DuoDivide Brush".

HyperStream Detangling DuoBrush1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026

DuoDivide Main Brush1Maker product pageus.roborock.com/products/roborock-qrevo-curv-xRead 14 October 2026Page lists the DuoDivide Main Brush

Main brush liftiThe robot can raise its main brush off the floor, for example while it mops.

No1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026The comparison table marks Main Brush Lifting absent for the L40s Ultra and present for the AE and CE. The spec table has no such row. The comparison blog says the mops lift and the brush stays down

Yes1Maker product pageus.roborock.com/products/roborock-qrevo-curv-xRead 14 October 2026Mop mode: the main brush lifts to stay dry and clean

Side brushesiSpinning edge brushes. 0 for a robot without one.

11Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026The in-box list has one side brush. The maker's comparison blog says all L40 models use one side brush

15Owner's manualcdn.shopify.com/s/files/1/0082/3666/2902/files/Roborock_Qrevo_CurvX_FCC_User_Manual.pdfRead 14 October 2026Parts list item A2-3 Side Brush, one7Measurementvacuumwars.com/compare/robot-vacuums/roborock_qrevo_curvxRead 14 October 2026Side Brushes: 1

Extending side brushiThe side brush or its arm swings outward to reach corners and wall edges. False only when the maker or a spec table says the feature is absent. Silence is a missing value.

Yes1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Spec table: Side Brush Extending yes

Yes1Maker product pageus.roborock.com/products/roborock-qrevo-curv-xRead 14 October 2026FlexiArm Side Brush and Edge Mopping System, 0 mm along the edge and corner7Measurementvacuumwars.com/compare/robot-vacuums/roborock_qrevo_curvxRead 14 October 2026Extending Side Brush: Yes

Side brush liftiThe robot can raise its side brush off the floor.

Yes1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Spec table: Side Brush Lifting yes

Not available

Max carpet pile (claimed)iTallest carpet pile the maker says the robot can clean. It is not the threshold height the robot can climb. A carpet height the robot climbs onto or glides over, such as carpet climbing 3 cm, is not a pile height.

Not available

Not available

Robot dustbiniDust capacity of the bin inside the robot. The base station's bag or bin is listed separately.

310mL1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Spec table: Dust Box Capacity 310ml. The comparison table says at least 300ml

258mL7Measurementvacuumwars.com/compare/robot-vacuums/roborock_qrevo_curvxRead 14 October 2026Hardware and Official Specs: Robot Dustbin Capacity 258 ml. Rue du Commerce lists 0.258 l too. Auchan lists 245 ml and inside-digital.de 0.27 l

FilteriPublished filter type or grade, such as "E11 HEPA". The robot's own filter. A dock filter goes in the source note.

Not available

Not available

Washable filteriThe maker says the filter can be rinsed with water.

Not available

Yes5Owner's manualcdn.shopify.com/s/files/1/0082/3666/2902/files/Roborock_Qrevo_CurvX_FCC_User_Manual.pdfRead 14 October 2026Parts list item A6-4 Washable Filter and the maintenance step to rinse the filter

Navigation and obstacles

7 of 8 differ

NavigationiHow the robot maps the home. A turret is a raised laser sensor on top. A retractable turret sinks into the body to pass under furniture. Built-in lidar sits inside the body with no turret. A solid-state 3D ToF sensor without a turret counts as built-in lidar. Camera means visual mapping without lidar. Gyroscope only means the robot has no mapping sensor and cleans in rows with a gyroscope. Random bounce means the robot has no mapping sensor and no gyroscope and turns when it bumps into something.

Lidar turret1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Spec table: Pathfinder Smart Navigation. The comparison table lists navigation LDS, a laser distance sensor. The height of 97 mm includes the turret, as for the other L Series models

Retractable lidar1Maker product pageus.roborock.com/products/roborock-qrevo-curv-xRead 14 October 2026RetractSense: the LiDAR stays raised for 360 degree scanning and retracts under low furniture to a 100 degree rear field of view8Reviewvacuumwars.com/roborock-qrevo-curvx-reviewRead 14 October 2026RetractSense is a retractable top-mounted LiDAR turret

Navigation system (as published)iThe maker's name, such as "VersaLift DToF" or "ClearView Pro LiDAR".

Pathfinder Smart Navigation (LDS)1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026

RetractSense Navigation System1Maker product pageus.roborock.com/products/roborock-qrevo-curv-xRead 14 October 2026RetractSense Navigation System

Obstacle sensors (as published)iThe maker's description of the front obstacle sensors, such as "AI Camera x2 + LED".

Single-Laser 3D Structured Light (3DAdapt)1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Comparison table: Single-Laser 3D Structured Light. The spec table says 3D Structured Light

Reactive AI 3.0 Obstacle Recognition with structured light and an RGB camera1Maker product pageus.roborock.com/products/roborock-qrevo-curv-xRead 14 October 2026Reactive AI 3.0 Obstacle Recognition with structured light and an RGB camera

AI object recognitioniA camera and software identify objects such as cables, socks and pet waste and steer around them. A structured light sensor without a camera counts when the maker says it identifies object types, as Narwal does. A bump sensor or infrared sensor alone does not qualify. False only when the maker or a spec table says the feature is absent. Silence is a missing value.

No1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Comparison table: the L40s Ultra has single-laser structured light only, with RGB AI listed for the AE. The maker's comparison blog says it detects obstacles by shape and depth without identifying them

Yes1Maker product pageus.roborock.com/products/roborock-qrevo-curv-xRead 14 October 2026

Object types recognized (claimed)iNumber of object types the maker says the robot can identify. A figure such as 300+ is stored as 300.

Not available

1081Maker product pageus.roborock.com/products/roborock-qrevo-curv-xRead 14 October 2026Detects and avoids 108 types of objects, as small as 5 cm wide and 3 cm tall (footnote 12)

Dirt detectioniA sensor or camera finds dirtier spots and the robot cleans them harder or again. False only when the maker or a spec table says the feature is absent. Silence is a missing value.

No1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Comparison table: Dirt Detection and AI Dirt Detection are marked absent for the L40s Ultra

Not available

Max threshold (claimed)iHighest single step or door threshold the maker says the robot can climb.

22mm1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 20260.87 in (22 mm) single-layer step with the auxiliary wheels. In-house lab data2Press releasedreametech.com/blogs/news/dreame-l40s-series-robot-vacuum-launchRead 15 October 2026Footnote: for a single-layer step the maximum height is 22mm

30mm8Reviewvacuumwars.com/roborock-qrevo-curvx-reviewRead 14 October 2026The review says the AdaptiLift chassis crosses thresholds up to 30 mm for a single tier or 40 mm for multi-tier. The maker page gives only the 1.57 in double-layer figure. The review did not state a measured threshold

Max two-step threshold (claimed)iHighest total height of a two-step threshold the maker says the robot can climb, such as a stepped sliding door track. Makers set conditions, such as a minimum width of the lower step.

40mm1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 20261.57 in (40 mm) double-layer step where the gap between the two layers is more than 1.18 in (30 mm). In-house lab data2Press releasedreametech.com/blogs/news/dreame-l40s-series-robot-vacuum-launchRead 15 October 202640mm is the height of a double-layer step where the gap between the two layers exceeds 3cm

40mm1Maker product pageus.roborock.com/products/roborock-qrevo-curv-xRead 14 October 20261.57 in max double-layer threshold crossing, 4 cm in the gallery image. Internal maker test. 1.57 in = 39.9 mm, stored as 40

Mopping

5 of 8 differ

Mop typeiNone means the robot only vacuums. Spinning pads are round pads that rotate. A roller is a turning cylinder. A track is a belt-shaped mop that rolls over the floor. A vibrating pad moves back and forth. A static pad is dragged.

Spinning pads1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Dual Spinning Mops

Spinning pads1Maker product pageus.roborock.com/products/roborock-qrevo-curv-xRead 14 October 2026Dual spinning mops

Extending mopiA mop pad or roller moves outward to reach wall edges and under low furniture. False only when the maker or a spec table says the feature is absent. Silence is a missing value.

Yes1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Spec table: Mop Extending yes

Yes1Maker product pageus.roborock.com/products/roborock-qrevo-curv-xRead 14 October 2026Edge Mopping System with the FlexiArm side brush7Measurementvacuumwars.com/compare/robot-vacuums/roborock_qrevo_curvxRead 14 October 2026Extending Mop Pad: Yes

Mop lift heightiHow far the robot raises its mop pads alone when it drives onto carpet, as the maker's spec table gives it. A lift with the raised chassis goes in the source note.

10.5mm1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 20260.41 in (10.5 mm), the height between the ground and the lifted pads. Footnote: based on in-house lab data

10mm1Maker product pageus.roborock.com/products/roborock-qrevo-curv-xRead 14 October 2026Gallery image says 10mm Mop Lifting for carpets. The page text says the mops lift up to 17 mm together with the lifted chassis (footnote 10). The pad-only 10 mm is stored

Leaves mop at the dockiThe robot drops its mop pads at the base station by itself and picks them up again, so it can vacuum carpet without them.

Yes1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Spec table: Mop Removal yes. Comparison table: Mop Automatic Removal yes. Mops are removed for long-pile carpets

No7Measurementvacuumwars.com/compare/robot-vacuums/roborock_qrevo_curvxRead 14 October 2026Drops Mop Pads at Station: No. The pads only lift on carpet

Mop downforce (claimed)iThe maker's claim for the force that presses the mop onto the floor. A claim in kilograms is converted at 1 kgf = 9.80665 N and rounded to one decimal, so 1 kg is 9.8 N. When the maker also gives a figure in N, that figure is stored. When the maker gives a range, such as 9-11 N, the top of the range is stored.

Not available

12N1Maker product pageus.roborock.com/products/roborock-qrevo-curv-xRead 14 October 2026Up to 12N. Needs the Deep Cleaning for Heavy Dirt or Stains function enabled in the app (footnote 5)

Mop speed (claimed)iHighest rotation speed of the spinning pads or the mop roller that wipes the floor. The speed of another roller that does not wipe the floor is not stored here.

Not available

200rpm1Maker product pageus.roborock.com/products/roborock-qrevo-curv-xRead 14 October 2026Gallery image says up to 200 RPM side mop speed

Robot water tankiClean water held in the robot itself. The base station tanks are separate.

Not available

68mL13Retailer pageauchan.fr/roborock-robot-aspirateur-laveur-qrevo-curvx-white/pr-3a4eac5f-29e6-45ed-92d2-03e0df22ceb5Read 14 October 2026Listing: clean water tank of the robot 68 mL. inside-digital.de lists 0.07 l. The same listing gives 245 mL for the dustbin, which is not stored

Water flow levelsiNumber of water flow settings the user can pick for mopping.

Not available

Not available

Base station

8 of 10 differ

Base stationiThe main jobs of the dock sold with this model. Auto-empty means the dock sucks the dust out of the robot. Mop washing means the dock cleans the mop.

Auto-empty and mop washing1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Dock empties the dust box, washes the mop pads and dries them

Auto-empty and mop washing1Maker product pageus.roborock.com/products/roborock-qrevo-curv-xRead 14 October 2026Auto dust emptying plus hot-water mop washing

Base station featuresiExtra dock functions. Hot-air drying dries the mop with warm air. Auto detergent adds cleaning solution by itself. Robot tank refill fills the robot's water tank. Self-cleaning wash tray means the dock cleans its own mop washing tray.

Hot-air drying, Auto detergent, Robot tank refill, Self-cleaning wash tray1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Spec table: Hot Air Drying, Auto Solution Adding, Auto Tank Water Refilling and a self-cleaning washboard (AceClean DryBoard)6Retailer pageamazon.com/dp/B0DYSXC9X9Read 15 October 2026Bullet text: the dock rinses the mop pads with 167°F hot water, dries them and refills solution and water. The Amazon item details give model number RLL77SE, which conflicts with RLL22SE and is not stored

Hot-air drying, Robot tank refill, Self-cleaning wash tray1Maker product pageus.roborock.com/products/roborock-qrevo-curv-xRead 14 October 2026Hot water dock self-cleaning, 113 F warm air drying, warm water auto-refilling. FAQ says there is no cleaning solution cartridge

Base station water supplyiWater tanks means clean and dirty water tanks that the user fills and empties. Plumbed means the dock connects to a water inlet and a drain. The third option has tanks and a plumbing kit sold separately.

Water tanks, plumbing kit optional1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Clean and used water tanks. Footnote: a Water Hookup Kit is available for separate purchase and support may vary by region. The maker's review blog says the same

Water tanks7Measurementvacuumwars.com/compare/robot-vacuums/roborock_qrevo_curvxRead 14 October 2026Plumbing Connections: No

Base station dust containeriWhat the dock empties the robot's dust into.

Bag1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Dust bag in the dock, two bags in the box

Bag1Maker product pageus.roborock.com/products/roborock-qrevo-curv-xRead 14 October 2026Disposable dust bag pre-installed in the dock

Base station dust capacityiCapacity of the dust bag or bin in the dock.

3.2L1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 20263.2L dust bag

Not available

Days between bag changes (claimed)iThe maker's estimate of how long the dock holds dust before it must be emptied. Makers assume different homes, pets and schedules.

100days1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Up to 100 days. Footnote: based on a calculation derived from environment testing in the maker's lab, conditions not stated

49days1Maker product pageus.roborock.com/products/roborock-qrevo-curv-xRead 14 October 2026Up to 7 weeks without manual emptying, internal maker test. 7 weeks = 49 days7Measurementvacuumwars.com/compare/robot-vacuums/roborock_qrevo_curvxRead 14 October 2026Days Before Empty: 49 days, the same as the maker's 7 weeks

Clean water tankiClean water tank in the base station.

4.5L1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Spec table: Clean/Used Water Tank Capacity 4.5L/4.0L

4L7Measurementvacuumwars.com/compare/robot-vacuums/roborock_qrevo_curvxRead 14 October 2026Bin Water Tank Liters: 4 litres. inside-digital.de also lists a 4.0 l clean water tank10Spec databaseinside-digital.de/saug-wisch-roboter-vergleich/roborock-qrevo-curvx/roborock-saros-20-sonicRead 14 October 2026Cleaning station clean water 4.0 l

Dirty water tankiDirty water tank in the base station.

4L1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Same row as the clean tank

3L10Spec databaseinside-digital.de/saug-wisch-roboter-vergleich/roborock-qrevo-curvx/roborock-saros-20-sonicRead 14 October 2026Cleaning station dirty water 3.0 l. Single source, the maker and Vacuum Wars do not state it

Mop wash water temperature (claimed)iHighest water temperature the dock uses to wash the mop. The maker's own figure. Makers measure at different points, so values are not comparable between makers. The measuring point is required in the source note. A maker can claim another figure in another market, so it is per variant.

75°C1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Auto Mop Cleaning with Hot Water 167°F, which is 75 C. Footnote: base station water outlet temperature up to 167°F after heating, at about 73.4°F room temperature

80°C1Maker product pageus.roborock.com/products/roborock-qrevo-curv-xRead 14 October 2026Water at the clean water dispensers of the base can be heated up to 80 C (176 F) at standard room temperature

Mop drying air temperature (claimed)iTemperature of the warm air the dock blows over the mop. The maker's own figure. Makers measure at different points, so values are not comparable between makers. The measuring point is required in the source note.

Not available

45°C1Maker product pageus.roborock.com/products/roborock-qrevo-curv-xRead 14 October 2026Air at the base outlet during drying can be heated up to 45 C (113 F) at standard room temperature

Battery and charging

3 of 6 differ

Battery capacityiPublished capacity of the robot's battery pack at the nominal battery voltage. When the maker gives a typical or headline figure and a lower rated figure, the headline figure is stored and the rated one goes in the source note, as for Dreame. A rated figure alone is stored. A count times a capacity, such as 2600 mAh x 2, is not a pack capacity. The total is stored only when the maker or a review states it.

5,200mAh1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Spec table: 5,200mAh. Footnote: based on in-house lab data

6,400mAh1Maker product pageus.roborock.com/products/roborock-qrevo-curv-xRead 14 October 2026Specifications: Battery Type 6400 mAh lithium-ion battery. FAQ lists a 6400 mAh battery capacity5Owner's manualcdn.shopify.com/s/files/1/0082/3666/2902/files/Roborock_Qrevo_CurvX_FCC_User_Manual.pdfRead 14 October 2026Basic Parameters: 14.4 V/6400 mAh (TYP) lithium-ion battery

Battery voltageiNominal pack voltage, such as 14.4 V.

14.4V5Retailer pageteamplush.by/en/product/dreame-l40s-ultraRead 15 October 2026Reseller copy of the user manual specifications: robot model RLL22SE, rated voltage 14.4 V DC. 5,200 mAh at 14.4 V is 74.9 Wh

14.4V5Owner's manualcdn.shopify.com/s/files/1/0082/3666/2902/files/Roborock_Qrevo_CurvX_FCC_User_Manual.pdfRead 14 October 2026Basic Parameters: 14.4 V

Rated poweriRated electrical power of the robot from the spec sheet, label or manual. The base station's power is not included. A charger input rating from the manual, such as 20 V 2.5 A, is not this value.

75W5Retailer pageteamplush.by/en/product/dreame-l40s-ultraRead 15 October 2026Robot rated power 75 W in the same table. The base station model is RCLE0305

Not available

Max run time (claimed)iLongest run time on one charge that the maker claims. Makers usually state it in the quietest suction mode without mopping. Claims that include charging breaks are not stored.

220min1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Up to 220 minutes. Footnote: tested in vacuuming mode under quiet suction

220min7Measurementvacuumwars.com/compare/robot-vacuums/roborock_qrevo_curvxRead 14 October 2026Official Battery Life 220 mins. Smart Home Compared also lists 220 minutes. inside-digital.de lists 3.3 h and Auchan 4 h 50, the maker pages state no run time8Reviewvacuumwars.com/roborock-qrevo-curvx-reviewRead 14 October 2026Official battery life is 220 minutes9Spec databasesmarthomecompared.com/robot-vacuums/roborock-qrevo-curvxRead 14 October 2026Battery Life 220 minutes

Full charge time (claimed)iThe maker's claim for charging from empty to full. A partial charge, such as 9 to 80%, is not stored.

210min5Retailer pageteamplush.by/en/product/dreame-l40s-ultraRead 15 October 2026Full charge time approximately 3.5 hours, stored as 210 minutes. SmartHomeCompared also lists 3.5 hours. Dreame's review article says roughly 4 hours

Not available

Recharge and resumeiThe robot returns to the dock to charge and then finishes the job where it stopped.

Yes1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Page text: returns to the dock for recharge and resumes cleaning from where it left off

Yes5Owner's manualcdn.shopify.com/s/files/1/0082/3666/2902/files/Roborock_Qrevo_CurvX_FCC_User_Manual.pdfRead 14 October 2026Instructions for Use: after charging, the robot will resume where it left off7Measurementvacuumwars.com/compare/robot-vacuums/roborock_qrevo_curvxRead 14 October 2026Recharge and Resume: Yes

Noise

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Noise (claimed)iOne row per noise figure the maker publishes. Suction mode is the maker's mode name, such as "Standard". When the maker gives a range, the top of the range is stored. A row leaves out the activity or the mode when the maker does not name it, such as a figure for quiet mode alone or a bare figure with neither.

ADreame L40s Ultra

Activity	Suction mode	Noise (dB(A))
Vacuuming	Quiet	55
Vacuuming	Turbo	72
Dock emptying	Not available	80

Source3Maker product pagedreametech.com/blogs/blog/dreame-l40s-ultra-reviewRead 15 October 2026Dreame's own review article dated 2025-08-10: Quiet mode roughly 55 dB, Turbo (Max) about 70-72 dB at the robot, dock emptying about 80 dB. The top of the range, 72, is stored. The standard mode is only called the low 60s and is not stored. No weighting or test method is stated

BRoborock Qrevo CurvX

Activity	Suction mode	Noise (dB(A))
Mopping only	Standard	53

Source1Maker product pageus.roborock.com/products/roborock-qrevo-curv-xRead 14 October 2026Mopping noise as low as 53 dB in Standard mop-only mode, in a semi-anechoic chamber (footnote 6). The weighting is not stated

Connectivity and app

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Wi-Fi standardi802.11n is Wi-Fi 4, 802.11ac is Wi-Fi 5 and 802.11ax is Wi-Fi 6. Use the highest protocol the manual lists. None only when a source says the robot has no Wi-Fi.

Not available

Wi-Fi 46Owner's manualsupport.roborock.com/hc/es/article_attachments/47352362422681Read 14 October 2026Spanish CE manual, Especificaciones de RF: WiFi 802.11b/g/n, 2400-2483.5 MHz

Wi-Fi bandsiBands the maker's manual or spec table states. Many robots use 2.4 GHz only. Vacuum Wars' Wi-Fi version column is not used for this field.

2.4 GHz5Retailer pageteamplush.by/en/product/dreame-l40s-ultraRead 15 October 2026Operating frequency range 2400-2483.5 MHz and only 2.4 GHz networks are supported

2.4 GHz6Owner's manualsupport.roborock.com/hc/es/article_attachments/47352362422681Read 14 October 2026RF table lists only 2.4 GHz and the manual says only 2.4 GHz WiFi is supported

Bluetooth versioniAs published, such as "4.1". Robots use Bluetooth for setup.

Not available

4.16Owner's manualsupport.roborock.com/hc/es/article_attachments/47352362422681Read 14 October 2026RF table: Bluetooth BLE V4.1

MatteriThe maker states Matter support. Support that is only promised for a later update is not counted.

No8Spec databasesmarthomecompared.com/robot-vacuums/dreame-l40s-ultraRead 15 October 2026The review says this model has no Matter or native Apple Home support

Not available

Voice assistantsiThird-party assistants that can control the robot, such as "Amazon Alexa".

Amazon Alexa, Google Assistant2Press releasedreametech.com/blogs/news/dreame-l40s-series-robot-vacuum-launchRead 15 October 2026Compatible with third-party voice assistants (Alexa, Google Assistant)9Reviewvacuumchef.com/dreame-l40s-ultra-review-powerful-suction-smart-mopping-real-world-performance-testedRead 15 October 2026Alexa and Google Assistant, as in the maker's launch article

Amazon Alexa, Apple Siri Shortcuts, Google Home1Maker product pageus.roborock.com/products/roborock-qrevo-curv-xRead 14 October 2026Voice commands via Amazon Alexa, Apple Siri Shortcuts or Google Home

Built-in voice controliThe robot has its own microphone and responds to spoken commands without a smart speaker.

No1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Spec table: Voice Control Third-Party. Comparison table: Direct Voice Control absent9Reviewvacuumchef.com/dreame-l40s-ultra-review-powerful-suction-smart-mopping-real-world-performance-testedRead 15 October 2026Review notes there is no built-in voice assistant

Yes1Maker product pageus.roborock.com/products/roborock-qrevo-curv-xRead 14 October 2026Hello Rocky voice assistant that works without an internet connection

Companion appiThe maker's phone app for the robot, by name.

Dreamehome1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Dreamehome App Control section

Roborock app1Maker product pageus.roborock.com/products/roborock-qrevo-curv-xRead 14 October 2026Roborock App

Saved mapsiNumber of floor maps the robot can store, for homes with several levels.

41Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Navigate and Map section: Fast Mapping (4 Maps)3Maker product pagedreametech.com/blogs/blog/dreame-l40s-ultra-reviewRead 15 October 2026The robot can save up to 4 floor maps

Not available

Live videoiThe app can show the robot's camera view live.

No4Maker product pagedreametech.com/blogs/blog/robot-vacuum-comparison-l40-l40s-ultra-ae-ceRead 15 October 2026Comparison table row Remote Video Viewing: no for the L40s Ultra, which has no camera

Yes1Maker product pageus.roborock.com/products/roborock-qrevo-curv-xRead 14 October 2026Video call with real-time video and two-way voice7Measurementvacuumwars.com/compare/robot-vacuums/roborock_qrevo_curvxRead 14 October 2026Live Video Monitoring: Yes

Measured

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Suction at the brush housing (measured)iSuction pressure a reviewer measured with a manometer at the robot's brush housing on the highest power setting. It is far lower than the maker's figure and is not comparable to it.

Not available

0.54kPa7Measurementvacuumwars.com/compare/robot-vacuums/roborock_qrevo_curvxRead 14 October 2026Vacuum Wars Suction Test, manometer at the brush housing, maximum power. Compare page and review both say 0.54 kPa8Reviewvacuumwars.com/roborock-qrevo-curvx-reviewRead 14 October 20260.54 kPa of suction at maximum power, category average 0.96 kPa

Airflow (measured)iAirflow at the suction inlet on the highest power setting, measured by a reviewer with an anemometer.

Not available

13CFM7Measurementvacuumwars.com/compare/robot-vacuums/roborock_qrevo_curvxRead 14 October 2026Vacuum Wars Airflow Test, maximum power, 13 CFM8Reviewvacuumwars.com/roborock-qrevo-curvx-reviewRead 14 October 202613 cfm of airflow at maximum power, category average 16.8 cfm

Embedded sand pickup on carpet (measured)iShare of sand worked into medium-pile carpet that the robot removed in a timed run on the highest power setting. The reviewer weighs the robot's bin before and after.

92%7Reviewvacuumwars.com/dreame-l40s-series-reviewRead 15 October 2026Vacuum Wars carpet deep clean test, sand embedded in carpet: L40s Ultra 92 percent, average 75 percent. Review last updated 2026-09-16

92%7Measurementvacuumwars.com/compare/robot-vacuums/roborock_qrevo_curvxRead 14 October 2026Vacuum Wars Carpet Deep Clean Test: sand embedded in medium-pile carpet, 92 percent. The review ranks it third of over 205 robots8Reviewvacuumwars.com/roborock-qrevo-curvx-reviewRead 14 October 202692 percent of deeply embedded sand removed on medium carpet

Pet hair pickup on carpet (measured)iShare of a fixed weight of flattened pet hair, about 2.5 inches long, removed from carpet in two runs. The reviewer weighs the hair left behind.

91%7Reviewvacuumwars.com/dreame-l40s-series-reviewRead 15 October 2026Vacuum Wars 2.5-inch flattened pet hair on carpet test: 91 percent

77.5%7Measurementvacuumwars.com/compare/robot-vacuums/roborock_qrevo_curvxRead 14 October 2026Vacuum Wars 2.5-inch flattened pet hair test on carpet: 77.5 percent

Max threshold (measured)iHighest single threshold the robot cleared on a reviewer's test rig.

Not available

Not available

Test obstacles avoided (measured)iNumber of the 24 test objects the robot steered around in Vacuum Wars' standard and torture obstacle tests.

77Reviewvacuumwars.com/dreame-l40s-series-reviewRead 15 October 2026Vacuum Wars standard and torture obstacle tests: 7 of a possible 24 objects

208Reviewvacuumwars.com/roborock-qrevo-curvx-reviewRead 14 October 2026Obstacle avoidance evaluation: 20 out of 24, the overall average is 17. Review last updated 2026-08-28

Area per charge (measured)iFloor area the reviewer estimates per charge from measured battery use and a fixed floor plan, on the lowest suction setting without mopping. Vacuum Wars multiplies battery efficiency by navigation efficiency. It is not a full-charge run.

179.77m²7Reviewvacuumwars.com/dreame-l40s-series-reviewRead 15 October 2026Chart: 1,935 sq ft times 0.09290304 = 179.77 m2. Battery efficiency 2.10 min per percent and navigation efficiency 0.85 m2 per min. The page does not repeat the power setting

Not available

Dimensions and weight

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Robot shapeiShape seen from above. D-shaped means a flat front and a round back.

Round1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Spec table lists 13.78 x 13.78 in. Round body in the maker photos

Round1Maker product pageus.roborock.com/products/roborock-qrevo-curv-xRead 14 October 2026Round body in the maker photos, 352 x 350 mm

Robot widthiWidth of the robot from side to side.

350mm1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Spec table: 13.78 x 13.78 x 3.82 in, which is 350 x 350 x 97 mm. The page says dimensions may vary by up to 0.08 in

350mm9Spec databasesmarthomecompared.com/robot-vacuums/roborock-qrevo-curvxRead 14 October 2026Lists the robot as 352 x 350 x 79.8 mm, length by width by height10Spec databaseinside-digital.de/saug-wisch-roboter-vergleich/roborock-qrevo-curvx/roborock-saros-20-sonicRead 14 October 2026Maße (Länge x Breite x Höhe) 35.2 cm x 35 cm x 7.98 cm, width 350 mm

Robot depthiLength of the robot from front to back. The Length in a maker's Length x Width x Height is the depth.

350mm1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026See width note

352mm9Spec databasesmarthomecompared.com/robot-vacuums/roborock-qrevo-curvxRead 14 October 2026Length 352 mm is stored as the depth, front to back. inside-digital.de also lists 35.2 cm length by 35 cm width. Maker pages do not name the axes10Spec databaseinside-digital.de/saug-wisch-roboter-vergleich/roborock-qrevo-curvx/roborock-saros-20-sonicRead 14 October 2026Length 352 mm

Robot heightiHeight at the robot's lowest operating position. A fixed lidar turret is included. A retractable turret is lowered. This decides which furniture the robot fits under.

97mm1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 20263.82 in = 97 mm. The LDS turret is fixed and included

79.8mm1Maker product pageus.roborock.com/products/roborock-qrevo-curv-xRead 14 October 2026Robot 13.86 x 13.78 x 3.14 in. The French page gives 352 x 350 x 79.8 mm. The lidar is retracted at 79.8 mm3Maker product pagefr.roborock.com/products/roborock-qrevo-curvxRead 14 October 2026Dimensions du produit: Robot 352 x 350 x 79,8 mm8Reviewvacuumwars.com/roborock-qrevo-curvx-reviewRead 14 October 20263.14 inches with the turret retracted

Height with sensor raisediHeight with a retractable lidar turret raised. Empty for a robot without a retractable sensor.

Not available

Not available

Robot weightiRobot with battery and dustbin, without the base station. Some store pages label the robot and dock together as Robot Weight. Check that the figure fits the robot alone.

4.1kg(9 lb)1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Spec table: Robot Vacuum Weight 9.04 lbs = 4.10 kg

4.42kg(9.7 lb)1Maker product pageus.roborock.com/products/roborock-qrevo-curv-xRead 14 October 2026Robot 9.74 lb x 0.45359237 = 4.42 kg. The French, Spanish and Polish pages give 4.42 kg3Maker product pagefr.roborock.com/products/roborock-qrevo-curvxRead 14 October 2026Poids du produit: Robot 4,42 kg

Base station dimensionsiWidth, depth and height of the dock. When the maker gives the depth with and without the ramp, the depth with the ramp is stored. Makers write the axes in different orders, so they are mapped with care. A size the maker gives for the robot and dock together counts only when the robot sits inside the dock's footprint, and the source note says so.

Width340Depth457Height590mm(13.4 × 18 × 23.2 in)1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Spec table: Base Station Dimensions 13.39 x 17.99 x 23.23 in, which is 340 x 457 x 590 mm in width, depth, height order. Depth follows the other Dreame docks. The ramp extension in the box is not described

Width450Depth450Height450mm(17.7 × 17.7 × 17.7 in)1Maker product pageus.roborock.com/products/roborock-qrevo-curv-xRead 14 October 2026The US page lists 17.72 x 17.72 x 17.72 in and the French page lists 450 x 450 x 450 mm. Every Roborock page repeats the same cube, so the figure may be approximate3Maker product pagefr.roborock.com/products/roborock-qrevo-curvxRead 14 October 2026Station d'accueil 450 x 450 x 450 mm

Base station weightiDock without the robot and with empty tanks.

9.2kg(20.3 lb)1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Spec table: Base Station Weight 20.28 lbs = 9.20 kg

10kg(22 lb)1Maker product pageus.roborock.com/products/roborock-qrevo-curv-xRead 14 October 2026Dock 22.05 lb = 10.00 kg. The French page says 10.00 kg3Maker product pagefr.roborock.com/products/roborock-qrevo-curvxRead 14 October 2026Station d'accueil 10,00 kg

Certifications

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FCC IDs

Not available

Not available

Other certificationsiNamed certifications, verbatim, such as a TÜV SÜD or UL Solutions cybersecurity mark.

Not available

TÜV Rheinland secure smart home product, ETSI EN 303 6451Maker product pageus.roborock.com/products/roborock-qrevo-curv-xRead 14 October 2026Page says the robot has TUV Rheinland certification as a secure smart home product and complies with ETSI EN 303 645

In the box

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In the boxiItems supplied with this exact model, verbatim.

Robot Vacuum x1, Base Station x1, Main Brush (pre-installed) x1, Brush Guard (pre-installed) x1, Side Brush (pre-installed) x1, Scale Inhibitor (pre-installed) x1, Dust Box (pre-installed, including dust box filter) x1, Mop Pad Holders x2, Mop Pads x2, Dust Bags (pre-installed x1) x2, Cleaning Tool x1, 200ml Cleaning Solution x1, Base Station Ramp Extension x1, Quick Start Guide x1, User Manual x11Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026What's in the Box list on the US page

Robot, Dock (Disposable dust bag pre-installed), Mop Cloths, Mop Cloth Mounts, Power Cord, User Manual1Maker product pageus.roborock.com/products/roborock-qrevo-curv-xRead 14 October 2026What's in the Box list

Links

Not compared

Product page

www.dreametech.com/products/l40s-ultra-robot-vacuum1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026

us.roborock.com/products/roborock-qrevo-curv-x1Maker product pageus.roborock.com/products/roborock-qrevo-curv-xRead 14 October 2026

Spec sheet

Not available

Not available

Manual

Not available

cdn.shopify.com/s/files/1/0082/3666/2902/files/Roborock_Qrevo_CurvX_FCC_User_Manual.pdf5Owner's manualcdn.shopify.com/s/files/1/0082/3666/2902/files/Roborock_Qrevo_CurvX_FCC_User_Manual.pdfRead 14 October 2026US FCC user manual for the Qrevo CurvX, hosted on Roborock's store files

EPREL registration numberiId in the EU energy label database. Each size or model of a series has its own id, so it is per variant.

Not available

Not available

Warranty

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Manufacturer warranty (source market)iThe maker's warranty period for the exact SKU or configuration and market named in the source note. It applies only to that stated market, not every regional variant. Statutory consumer rights are excluded. The base term is stored. An extension that needs registration goes in the source note.

3years1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 20263-Year Warranty on the US store page

1year1Maker product pageus.roborock.com/products/roborock-qrevo-curv-xRead 14 October 20261-year limited warranty on the US store page7Measurementvacuumwars.com/compare/robot-vacuums/roborock_qrevo_curvxRead 14 October 2026Warranty period 1 year

Both are also in the API. Back to all robot vacuums.