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Viomi S9 Robot Vacuum Cleaner Price, Specs and Best Deals

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Viomi S9 Vacuum is a Robot Vacuum with 2-in-1 mopping and sweeping feature. It has 2700 Pa sucking power with an advanced self-cleaning station. This Vacuum also has an LDS laser distance meter with S.L.A.M. algorithm, to map the rooms in your house, tracing the path of your house for easy cleaning. It is also equipped with 3L dust bin and 250ml water tank for effective cleaning.

Where to Buy Viomi S9 Vacuum Cleaner

Gearbest – See Offers | Jumia Nigeria – See Offers

Viomi S9 Vacuum has 3 cleaning modes, 24 built-in sensors and 4 cliff sensors. There is also a 5200 mAh large battery capacity to offer up to 3.6 hours of long service duration. This vacuum also support  iOS/Android for Xiaomi Mi Home application to schedule cleaning process and controlling.

Viomi S9 Vacuum Key Specs & Features

  • 2700 Pa Suction power
  • NIDEC Japan brushless motor
  • 5200mAh Li-ion Battery
  • 950W self cleaning station
  • LED display on the station
  • LDS 2.0 sensor and S.L.A.M. algorithm
  • 3L Dust bag
  • 250ml Water Tank
  • 24 built-in sensors
  • 180-240min Charging time
  • Automatic charging and cleaning
  • “S” and “Y” cleaning pattern
  •  iOS/Android Support

Viomi S9 Vacuum


Although a 2-in-1 vacuum, the Viomi S9 Vacuum has a sleek, slim and elegant design with fine, clean lines made of quality plastic materials. It measures an overall dimension of 350 x 350 x 98 mm and weigh 3.8 kg, therefore, it can easily clean under sofa, shelf and more.

At the top of the vacuum cleaner is a classic rotating 360° laser radar and two button, through which the vacuum cleaner is turned on/off or sent cleaning. Unlike the Viomi SE and most 2-in-1 vacuum where the water tanks and dust tank are positioned at the bottom or under the lid, the Viomi S9 water and dust tank has been moved to the back of the vacuum.

At the bottom, there is a side brush, a large main brush, two large side wheels, and one central wheel. The side, however, contains bumpers and sensors for collision avoidance, magnetic connectors for charging, and holes for cooling.

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Xiaomi VIOMI S9 vacuum cleaner has an amazing suction power, which reaches 2700 Pa to pick up any dirt, dust or debris on any surface, including hardwood, floors, and carpets. The vacuum features the Japan-made Nidec brushless motor for high power and powerful performance, to thoroughly clean the room without any dead spots. The air blower upgraded the rotate speed up to 15000 r/min to improve cleaning efficiency.

The vacuum can automatically detect whether its cleaning a tiles, carpet and solid floor, so it can switch between the 3 vacuuming modes.

This vacuum also features the HEPA filter which are much more effective in filtering fine particles which can affect people suffering from different allergies.

Furthermore, with V-shaped side brush and large main brush at the central part, the vacuum is capable of ridding your home of any dirt be it at the edge or clear space.

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The Xiaomi VIOMI S9 is perfectly capable of effective mopping. It has 250 ml electric water tank which enables it to cover a much bigger area in mopping mode. This cleaner automatically switch to the mopping feature when the water tank and mopping pad with a cloth attached.

During mopping the VIOMI S9 follows the “S” and “Y” cleaning pattern which is more efficient than just dragging the mop cloth around.

The vacuum includes two types of mopping cloths, one for light mopping and the other one for heavy mopping. One is for fully wet mopping with the water tank installed, it absorbs water and is suitable for bigger areas, another one is for dampening your floors while the cleaner is vacuuming and mopping in the same time.

Also, there are three mopping modes in the app, you can adjust the level of water leaking depending on your needs and size of your house.

Mapping and Intelligent navigation

This Vacuum has an LDS 2.0 sensor (laser distance sensor), a rotating laser sensor on top of the vacuum cleaner combined with an efficient SLAM cleaning algorithm. The Navigation LDS system analyzes the area to be cleaned to creates an effective vacuuming plan in each apartment or house with the 6-axis gyroscope, thus, shortening the cleaning time and improving the efficiency by 30%.

It then calculates the fastest and most optimum way to move and clean. Thanks to the mapping feature, the robot always knows where it needs to clean and where it has already cleaned. With the mapping and navigation sensor, this vacuum gives the best results when planning and moving around.

Smart Feature

Viomi S9 Vacuum supports Mi Home APP which allows users to control the devices remotely and check the cleaning status in real time on your smartphone.

The vacuum can be paired with a mobile phone app through WiFi, so you can easily take full advantage of its smart features. With the app you can schedule cleaning like where to clean, position to clean, view live map and more. You can create No-Go zones, virtual walls, area-wise cleaning schedules, and more from the Xiaomi Mi Home app. You can also merge, divide, and name the map partitions.

This Robotic vacuum comes with 24 different sensors for easily navigate without dropping, colliding with walls or obstacles and climb small slopes of up to 2 cm without any problem.

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Viomi S9 Vacuum cleaner is powered by a 5200 mAh battery, which can work for up to 180-240min to clean up to 250 square meters at a single charge. This vacuum also has an auto-dumping system 2.0 to empty dirt disposal automatically after cleaning.

The self-cleaning station contains a 950W suction system for cleaning. In addition, the charging station automatically empties the garbage container when the vacuum cleaner returns.

Viomi S9 charging station also has a built-in 3L bag to take in dirt. The charging and self-cleaning station also has an integrated LCD screen that shows the status of the vacuum in three lines with a clear graphic and text. It gives indication when container is full and needed to replace.

Viomi S9 Vacuum Price and Availability

Viomi S9 Robot Vacuum cleaner price starts at around $599.99. It is available at retailers like Gearbest, Banggood, AliExpress, and Amazon.

Xiaomi Viomi S9 Robot Vacuum Cleaner Specs

Here are a few specs of the Viomi S9 Robot Vacuum cleaner:

General Features

  • Type: Robotic Vacuum Cleaner
  • Cleaning Modes: 3 Cleaning Modes
  • Suction Power: 2700pa
  • Cleaning Range: Up to 250 square cm
  • Dry Cleaning: Yes
  • Wet Cleaning: Yes
  • Remote Control: Yes, Mi Home APP
  • Noise Level: 65dB-75dB
  • Dimension: 350 x 350 x 98 mm
  • Weight:  3.8 kg
  • Auto Docking: Yes
  • Filter Type: HEPA Filter
  • Station Tank Capacity: 3 L
  • Water Tank Capacity: 250mL
  • Navigation Mode: LDS 2.0
  • Self Cleaning Station: Yes
  • Cleaned Area Indicator: Yes, LED Alert
  • Automatic Partition: Yes
  • Schedule Cleaning: Yes
  • Virtual Wall: Yes
  • APP: Compatible with Android and iOs
  • Anti-Collision System: Yes
  • Drop Avoidance System: Yes
  • Battery Capacity: 3200 mAh
  • Run Time: 120 minutes
  • Auto Charging: Yes
  • Voltage: 100-240V

Other Features

  • Climbing ability: 20mm
  • combined container for dust and water: 300ml + 250ml
  • Japan-made Nidec brushless motor
  • LSD laser navigation system
  • Upgraded “S” and “Y” cleaning mode
  • 24 sets of sensor

More on Vacuum Cleaner & Appliances

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Adeosun Ajibola
Adeosun Ajibola
Adeosun is an experienced Tech Writer specializing on Mobile Devices and Electronic Gadgets. At NaijaTechGuide, she is the Tech Specialist on Smartphones, Laptops, and TVs and since 2020 has written over 600 articles covering these verticals for the Tech Blog. She also has interests in Digital Marketing and eCommerce.

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