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Xiaomi S20 Review | 118 Data compared

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  • Avg. price in UK: ~£150
  • Avg. price in US: ~$170
  • Max suction power: 5000 Pa
  • Runtime: 120 min
  • Dustbin capacity: 400 mL
  • Max threshold height: 20 mm

Xiaomi S20 review. Compare 118 technical specifications and user reviews to see how this product ranks in the Robot Vacuums category and whether it is worth buying.

6.9

Overall score

What it is: An overall evaluation of the robot vacuum's quality, based on technical analyses and user reviews.

When it matters: When you need a quick reference to identify the best robot vacuums on the market.

Score components:

80.0%

6.9

Technical Score

20.0%

?

User score

Good
6.9

Technical Score

What it is: An assessment of robot-vacuum performance across cleaning, navigation, mopping, battery life, filtration, brush design, smart features, and dimensions.

When it matters: When you want to compare robot vacuums based on technical performance and available features.

Score components:

30.0%

6.7

Cleaning

23.0%

8.5

Navigation

18.0%

6.0

Mopping

12.0%

4.5

Battery

10.0%

8.9

Smart Features

7.0%

6.8

Design

Good
?

User score

What it is: A rating that combines user reviews and the total number of reviews received by the robot vacuum

When it matters: When you want to know how a robot vacuum handles daily tasks and how reliable it remains over time according to user feedback.

Score components:

70.0%

?

User reviews

30.0%

?

Popularity

  • 5.4
    Mopping

    Score components:

    35.0%

    5.2

    Mopping system type

    25.0%

    4.0

    Mop lifting

    20.0%

    4.0

    Auto water refill

    20.0%

    9.1

    Water tank capacity

  • 6.0
    Pet homes

    Score components:

    35.0%

    4.0

    Anti-tangle technology

    30.0%

    6.0

    Max suction power

    20.0%

    10

    Carpet boost

    15.0%

    5.3

    Dustbin capacity

  • 6.5
    Navigation and mapping

    Score components:

    30.0%

    8.5

    Primary navigation technology

    30.0%

    5.7

    Obstacle avoidance technology

    20.0%

    1.0

    Object recognition

    20.0%

    10

    Real-time mapping

  • No image
No image

Best prices in UK

    N/A~ £150

Best rankings

?

Available: ranking among products currently available (including other versions of this product).
All: ranking among all products in the database.

Verdict

The Xiaomi Robot Vacuum S20 is an agile 3-in-1 cleaning device equipped with a 5,000 Pa suction fan blower, an LDS laser navigation system for 360-degree house mapping, and a 2-in-1 combination tank featuring a 400 ml dustbin alongside a 270 ml water reservoir. Its main advantages include high-precision path planning via smart zigzag and Y-shaped cleaning routes, efficient simultaneous sweeping and mopping, smart home integration with Google Assistant and Amazon Alexa, and an accommodating 3,200 mAh battery capacity that handles multi-room layouts. However, its downsides include an noticeably loud operation when running on its highest turbo setting, potential struggles to clear fine dust embedded deep inside thick carpets, and a basic passive mop pad system that lacks the active scrubbing pressure found on more expensive models.

Technical Specifications of robot vacuum Xiaomi S20

Technical Score

What it is: An assessment of robot-vacuum performance across cleaning, navigation, mopping, battery life, filtration, brush design, smart features, and dimensions.

When it matters: When you want to compare robot vacuums based on technical performance and available features.

Score components:

30.0%

?

Cleaning

23.0%

?

Navigation

18.0%

?

Mopping

12.0%

?

Battery

10.0%

?

Smart Features

7.0%

?

Design

6.9
Xiaomi S20 has a technical score of 6.94, lower than that of 50.3% of robot vacuums.
User score

What it is: A rating that combines user reviews and the total number of reviews received by the robot vacuum

When it matters: When you want to know how a robot vacuum handles daily tasks and how reliable it remains over time according to user feedback.

Score components:

70.0%

0.0

User reviews

30.0%

1.0

Popularity

?
Popularity
What it is: An indicator based on the number of reviews received by the robot vacuum.
When it matters: When you prefer to purchase a product chosen and reviewed by many other consumers.
1.0
Xiaomi S20 has a popularity of 1 points, which is lower than 69.9% of products in this category.
Ratio quality/price

What it is: An indicator that combines the robot vacuum's overall rating with its cost.

When it matters: When you are looking for a robot vacuum with a good balance between quality and price.

Score components:

60.0%

6.9

Overall score

40.0%

9.7

Price

7.8
Xiaomi S20 has a quality-to-price ratio of 7.8 points, which is higher than 64.8% of products in this category.
Max suction power
What it is: Maximum suction power is the highest pressure the vacuum motor is rated to produce, measured in pascals.
When it matters: Higher figures can help lift embedded debris from carpet, but brush design and airflow also determine real cleaning performance.

Importance: HIGH

5,000 Pa
Xiaomi S20 delivers 5,000 Pa of suction power, more than that of 63.5% of robot vacuums and the same as that of 6.8% of robot vacuums.
N. of suction power levels
What it is: The number of suction levels shows how many power settings can be selected.
When it matters: More levels give finer control over noise, battery use and cleaning strength on different floors.

Importance: MEDIUM

3
Xiaomi S20 offers 3 suction levels, fewer than 50.5% robot vacuums and as many as 35.5% robot vacuums.
Motor type
What it is: Motor type identifies whether the suction motor uses a brushed or brushless design.
When it matters: Brushless motors generally offer better efficiency and durability, although complete airflow design still determines performance.

Importance: LOW

brushless
Xiaomi S20 uses a motor type considered more efficient than those in 2.7% of robot vacuums and matched by 97.3% of robot vacuums.
Power
What it is: Power is the electrical input rating of the robot or its charging system.
When it matters: It describes energy demand, but it should not be treated as a direct measure of suction or floor-cleaning ability.

Importance: LOW

?
Cleaning modes
What it is: Cleaning modes are the distinct automatic or targeted cleaning programs available on the robot.
When it matters: A wider choice makes it easier to match cleaning behavior to rooms, spills, edges or quiet periods.

Importance: MEDIUM

3
Xiaomi S20 offers 3 cleaning modes, fewer than 62% robot vacuums and as many as 27.7% robot vacuums.
Show more
Mopping capability
What it is: Mopping capability means the robot can wipe hard floors with a damp pad or active mop system.
When it matters: It is useful for fine dust and light marks, but it does not automatically mean the robot can replace deep manual mopping.

Importance: MEDIUM

yes
Xiaomi S20 can mop floors. 78.8% of robot vacuums offer this feature.
Mopping system type
What it is: The mopping system type describes how the robot applies motion and pressure to its mop, such as a static pad, vibrating pad, rotating pads or roller.
When it matters: Active systems generally scrub dried marks better, while pad lifting and dock washing determine how practical they are on mixed floors.

Importance: HIGH

static pad
Xiaomi S20 uses static pad for mopping. This system is more effective than those on 20.4% of robot vacuums and as effective as those on 46.3% of robot vacuums.
Mop pad type
What it is: The pad shape and attachment mechanism used by the mopping system.
When it matters: It affects floor contact, edge reach, replacement availability and whether the pads can be washed easily.

Importance: LOW

semi-circular
Mop pad material
What it is: Mop pad material is the fabric or fibre used to wipe and absorb dirt from the floor.
When it matters: It influences absorption, scrubbing action, durability and how easily the pad releases dirt when washed.

Importance: LOW

microfiber
Mop pressure
What it is: Mop pressure is the downward force the mopping system applies to the floor.
When it matters: More controlled pressure can improve removal of dried marks, although pad motion and moisture delivery also matter.

Importance: LOW

?
Show more
Primary navigation technology
What it is: The primary navigation technology is the main sensor system the robot uses to understand its position and plan a route.
When it matters: It affects route efficiency, coverage and how reliably the robot returns to its dock, especially in larger or more complex homes.

Importance: HIGH

LiDAR
Xiaomi S20 uses LiDAR as its primary navigation system, which is more capable than the systems in 34.7% of robot vacuums and matched by 60.4% of robot vacuums.
Mapping capability
What it is: Mapping capability lets the robot create a floor plan instead of cleaning only from moment-to-moment sensor reactions.
When it matters: A saved map is important for room selection, no-go zones and predictable coverage.

Importance: MEDIUM

yes
Xiaomi S20 maps the floor. 74% of robot vacuums offer this feature.
Real-time mapping
What it is: Real-time mapping updates the floor plan and the robot's route while a cleaning run is in progress.
When it matters: It helps you follow progress, spot missed areas and see where the robot is if it becomes stuck.

Importance: LOW

yes
Xiaomi S20 updates its map in real time. 68.5% of robot vacuums offer this feature.
Multiple map storage
What it is: Multiple map storage keeps separate floor plans for more than one level or cleaning area.
When it matters: It is useful in multi-storey homes because the robot does not need to rebuild the map each time it changes floors.

Importance: LOW

yes
Xiaomi S20 stores multiple maps. 56.4% of robot vacuums offer this feature.
Map editing
What it is: Map editing lets you divide, merge, name and adjust rooms in the app.
When it matters: Accurate room boundaries make room-by-room schedules and targeted cleaning easier to use.

Importance: LOW

yes
Xiaomi S20 lets you edit maps. 63.8% of robot vacuums offer this feature.
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App control
What it is: App control lets you operate and configure the robot from a smartphone application.
When it matters: It is needed for maps, room selection, schedules and many advanced settings on modern robot vacuums.

Importance: LOW

yes
Xiaomi S20 supports app control. 94.5% of robot vacuums offer this feature.
App name
What it is: App name identifies the manufacturer's mobile application used to control the robot.
When it matters: It helps you check phone compatibility, account requirements and user feedback for the correct app before buying.

Importance: LOW

Xiaomi Home
Wi-Fi connectivity
What it is: Wi-Fi connectivity links the robot to its app and cloud services through the home network.
When it matters: It enables remote control and updates, but setup quality depends on router compatibility and signal coverage.

Importance: LOW

yes
Xiaomi S20 connects to Wi-Fi. 93.7% of robot vacuums offer this feature.
Supported Wi-Fi bands
What it is: Supported Wi-Fi bands identify the wireless frequencies the robot can use, commonly 2.4 GHz and sometimes 5 GHz.
When it matters: Band support matters during setup because many robot vacuums connect only to a 2.4 GHz network.

Importance: LOW

2.4 GHz
Bluetooth connectivity
What it is: Bluetooth connectivity provides a short-range wireless link, often used during initial setup.
When it matters: It can simplify pairing but usually does not replace Wi-Fi for remote app control.

Importance: LOW

yes
Xiaomi S20 connects via Bluetooth. 64.5% of robot vacuums offer this feature.
Show more
Battery capacity
What it is: Battery capacity is the amount of electrical charge the battery can store, measured in milliamp-hours.
When it matters: More capacity can support longer cleaning runs, but motor power, mopping and navigation also affect actual runtime.

Importance: MEDIUM

3,200 mAh
Xiaomi S20 has a battery capacity of 3,200 mAh, more than that of 46.5% of robot vacuums and the same as that of 11.9% of robot vacuums.
Battery type
What it is: Battery type identifies the battery chemistry used by the robot.
When it matters: It affects weight, service life and charging behavior, with lithium-ion now being the common modern design.

Importance: LOW

Li-ion
Battery voltage
What it is: Battery voltage is the nominal electrical voltage of the robot's battery pack.
When it matters: It is mainly useful for checking replacement-battery compatibility and does not by itself indicate runtime.

Importance: LOW

14.4 V
Runtime
What it is: Runtime is how long the robot is rated to clean on one charge under the standardized test mode.
When it matters: Longer runtime matters on large floors, while recharge-and-resume can compensate for a smaller battery.

Importance: MEDIUM

120 min
Xiaomi S20 runs for 120 min per charge, shorter than 57.6% of robot vacuums and as long as 19.8% of robot vacuums.
Recharge and resume
What it is: Recharge and resume sends the robot back to charge and then returns it to the unfinished part of the map.
When it matters: It allows large cleaning jobs to finish without manual intervention when one battery charge is not enough.

Importance: LOW

yes
Xiaomi S20 resumes cleaning after charging. 83.1% of robot vacuums offer this feature.
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Shape
What it is: The robot's body outline, most commonly round or D-shaped.
When it matters: Shape influences corner reach and manoeuvring, although brush placement and route planning are equally important.

Importance: LOW

round
Height
What it is: Height is the vertical clearance required by the robot.
When it matters: A lower body can clean under more sofas, beds and cabinets, but measure the furniture gap before relying on it.

Importance: LOW

98 mm
Width
What it is: Width is the side-to-side size of the robot.
When it matters: It determines whether the robot can pass between chair legs, furniture and other narrow spaces.

Importance: LOW

325 mm
Length
What it is: Length is the front-to-back size of the robot.
When it matters: Together with width and shape, it affects turning space and access around closely placed furniture.

Importance: LOW

325 mm
Weight
What it is: Weight is the mass of the robot itself, excluding its dock.
When it matters: A lighter robot is easier to carry between floors, while weight has little direct connection to cleaning quality.

Importance: LOW

3.5 kg
Xiaomi S20 weighs 3.5 kg, less than 52.3% of robot vacuums and the same as 2.9% of robot vacuums.
Show more

Xiaomi S20 vs the average robot vacuum

  • 22 mm wider main brush
    Xiaomi S20 uses a main brush measuring 200 mm, compared with 178 mm for the average robot vacuum.
    What it is: Main brush width is the working width of the central debris-collecting roller.
    When it matters: A wider brush can cover more floor per pass, while edge design and navigation still affect total coverage.

    Importance: LOW

    Xiaomi S20 uses a main brush measuring 200 mm, compared with 178 mm for the average robot vacuum.200 mm vs 178 mm
  • 1,000 Pa stronger suction
    Xiaomi S20 delivers 5,000 Pa, compared with 4,000 Pa for the average robot vacuum.
    What it is: Maximum suction power is the highest pressure the vacuum motor is rated to produce, measured in pascals.
    When it matters: Higher figures can help lift embedded debris from carpet, but brush design and airflow also determine real cleaning performance.

    Importance: HIGH

    Xiaomi S20 delivers 5,000 Pa, compared with 4,000 Pa for the average robot vacuum.5000 Pa vs 4000 Pa
  • Includes a child lock
    Xiaomi S20 includes a child lock, while the average robot vacuum has no child lock.
    What it is: A child lock disables selected buttons or controls to prevent accidental operation.
    When it matters: It is useful where children or pets may touch the robot or dock controls.

    Importance: LOW

    Xiaomi S20 includes a child lock, while the average robot vacuum has no child lock.
  • 13 more supported languages
    Xiaomi S20 supports 30 languages, compared with 17 for the average robot vacuum.
    What it is: Supported languages are the interface or voice-prompt languages available on the robot and in its app.
    When it matters: Language availability affects setup, accessibility and how clearly the robot can report errors.

    Importance: LOW

    Xiaomi S20 supports 30 languages, compared with 17 for the average robot vacuum.30 vs 17
  • Newer model
    Xiaomi S20 was released in 2024, compared with 2023 for the average robot vacuum.
    What it is: Release date indicates when the robot vacuum model entered the market.
    When it matters: Newer models may receive longer software support and newer navigation features, while older models can offer better discounts.

    Importance: LOW

    Xiaomi S20 was released in 2024, compared with 2023 for the average robot vacuum.2,024 vs 2,023
  • 30 mL larger water tank
    Xiaomi S20 has a water-tank capacity of 270 mL, compared with 240 mL for the average robot vacuum.
    What it is: Water tank capacity is the amount of mopping water carried inside the robot.
    When it matters: A larger tank can cover more hard floor before refilling, though dock-based automatic refill can reduce this limitation.

    Importance: LOW

    Xiaomi S20 has a water-tank capacity of 270 mL, compared with 240 mL for the average robot vacuum.270 mL vs 240 mL
  • 73.3% cheaper
    Xiaomi S20 is cheaper than the average robot vacuum (£150 vs £260).
    Xiaomi S20 is cheaper than the average robot vacuum (£150 vs £260).£150 vs £260
  • Newer model
    Xiaomi S20 was released in 2024, compared with 2023 for the average robot vacuum.
  • Includes a child lock
    Xiaomi S20 includes a child lock, while the average robot vacuum has no child lock.
  • 13 more supported languages
    Xiaomi S20 supports 30 languages, compared with 17 for the average robot vacuum.
  • 22 mm wider main brush
    Xiaomi S20 uses a main brush measuring 200 mm, compared with 178 mm for the average robot vacuum.
  • 1,000 Pa stronger suction
    Xiaomi S20 delivers 5,000 Pa, compared with 4,000 Pa for the average robot vacuum.
  • 30 mL larger water tank
    Xiaomi S20 has a water-tank capacity of 270 mL, compared with 240 mL for the average robot vacuum.

Total
Overall
Design
Smart Features
Cleaning
Mopping
  • 66 m² less cleaning coverage
    Xiaomi S20 covers up to 114 m² per charge, compared with 180 m² for the average robot vacuum.
  • 30 min shorter runtime
    Xiaomi S20 runs for 120 min per charge, compared with 150 min for the average robot vacuum.
  • 1.6 W higher standby use
    Xiaomi S20 draws 3.6 W in standby; the average robot vacuum draws 2 W.
  • More basic obstacle avoidance
    Xiaomi S20 uses LiDAR for obstacle avoidance, while the average robot vacuum uses hybrid.
  • Does not detect carpets automatically
    Xiaomi S20 does not detect carpets automatically, while the average robot vacuum detects carpets automatically.
  • 1 fewer cleaning modes
    Xiaomi S20 offers 3 cleaning modes, compared with 4 on the average robot vacuum.
  • 1 fewer suction levels
    Xiaomi S20 offers 3 suction levels, compared with 4 on the average robot vacuum.
  • More basic obstacle avoidance
    Xiaomi S20 uses LiDAR for obstacle avoidance, while the average robot vacuum uses hybrid.
    What it is: Obstacle avoidance technology uses sensors, cameras, LiDAR or structured light to detect objects and route around them.
    When it matters: More capable systems reduce contact with cables, shoes, pet bowls and other clutter, so the robot needs fewer rescues.

    Importance: HIGH

    Xiaomi S20 uses LiDAR for obstacle avoidance, while the average robot vacuum uses hybrid.LiDAR vs hybrid
  • Does not detect carpets automatically
    Xiaomi S20 does not detect carpets automatically, while the average robot vacuum detects carpets automatically.
    What it is: Carpet detection allows the robot to recognize when it moves from hard flooring onto carpet or a rug.
    When it matters: It enables carpet-specific actions such as suction boost, mop lifting or carpet avoidance.

    Importance: MEDIUM

    Xiaomi S20 does not detect carpets automatically, while the average robot vacuum detects carpets automatically.
  • 1 fewer cleaning modes
    Xiaomi S20 offers 3 cleaning modes, compared with 4 on the average robot vacuum.
    What it is: Cleaning modes are the distinct automatic or targeted cleaning programs available on the robot.
    When it matters: A wider choice makes it easier to match cleaning behavior to rooms, spills, edges or quiet periods.

    Importance: MEDIUM

    Xiaomi S20 offers 3 cleaning modes, compared with 4 on the average robot vacuum.3 vs 4
  • 1 fewer suction levels
    Xiaomi S20 offers 3 suction levels, compared with 4 on the average robot vacuum.
    What it is: The number of suction levels shows how many power settings can be selected.
    When it matters: More levels give finer control over noise, battery use and cleaning strength on different floors.

    Importance: MEDIUM

    Xiaomi S20 offers 3 suction levels, compared with 4 on the average robot vacuum.3 vs 4
  • 66 m² less cleaning coverage
    Xiaomi S20 covers up to 114 m² per charge, compared with 180 m² for the average robot vacuum.
    What it is: Maximum cleaning area is the largest floor area the robot is rated to cover in one cleaning task.
    When it matters: It helps indicate whether the robot suits a large layout, although obstacles, power mode and mopping can reduce coverage.

    Importance: LOW

    Xiaomi S20 covers up to 114 m² per charge, compared with 180 m² for the average robot vacuum.114 m² vs 180 m²
  • 30 min shorter runtime
    Xiaomi S20 runs for 120 min per charge, compared with 150 min for the average robot vacuum.
    What it is: Runtime is how long the robot is rated to clean on one charge under the standardized test mode.
    When it matters: Longer runtime matters on large floors, while recharge-and-resume can compensate for a smaller battery.

    Importance: MEDIUM

    Xiaomi S20 runs for 120 min per charge, compared with 150 min for the average robot vacuum.120 min vs 150 min
  • 1.6 W higher standby use
    Xiaomi S20 draws 3.6 W in standby; the average robot vacuum draws 2 W.
    What it is: Standby power consumption is the electricity used while the robot or dock is idle but connected to power.
    When it matters: Lower standby use matters because the charging station normally remains plugged in all day.

    Importance: LOW

    Xiaomi S20 draws 3.6 W in standby; the average robot vacuum draws 2 W.3.6 W vs 2 W
  • 5.05x less popular
    Xiaomi S20 is less popular than the average robot vacuum (1.00 vs 5.053).
    What it is: An indicator based on the number of reviews received by the robot vacuum.
    When it matters: When you prefer to purchase a product chosen and reviewed by many other consumers.
    Xiaomi S20 is less popular than the average robot vacuum (1.00 vs 5.053).1 vs 5.05
Total
Overall
Battery
Navigation
Cleaning

Graphic comparison of Xiaomi S20 and other robot vacuums

Attribute category
Attribute
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Third-party reviews

What customers like about Xiaomi S20?

  • Excellent 5,000 Pa suction effectively removes dust and hair.
  • Precise LDS laser navigation avoids obstacles and maps the home quickly.
  • Zigzag and Y-shaped routes provide deeper mopping that imitates manual cleaning.
  • Intuitive Mi Home app enables remote control, scheduling and customization.
  • Excellent value, making it one of the best budget options.
  • Long battery life of up to 120 minutes suits medium and large spaces.

What customers dislike about Xiaomi S20?

  • A single side brush and round design can struggle to clean very tight corners thoroughly.
  • Mopping is useful for daily maintenance but struggles with very dried or embedded stains.
  • No self-emptying base, so the dustbin needs fairly frequent manual emptying.
  • Without advanced dual-camera technology, it can occasionally become tangled in loose cables or small floor objects.

Expert reviews

J
jacktang.sg
19/07/2025
Summary of the review
Xiaomi Robot Vacuum S20 Review
T
test-achats.be
Date non spécifiée
Summary of the review
Xiaomi S20 full review, price, and specs by Test-Achats
(Translated)Show original
A
altroconsumo.it
27/09/2026
Summary of the review
XIAOMI S20 robot vacuum cleaner, Altroconsumo test and review
(Translated)Show original
T
test-aankoop.be
Onbekend
Summary of the review
Xiaomi S20: test, review, prices, and specifications
(Translated)Show original

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