Xiaomi Robot Vacuum S40 Robot Vacuum Cleaner Review: Powerful but Limited

+ Advantages:

- Affordable price.

- Strong attraction in the segment.

- The ability to recognize and avoid objects works stably.

+ Limitations:

- The ability to clean the house is just enough.

- Lack of automation features.

+ Editor's Advice:

Xiaomi Robot Vacuum S40 is a basic cleaning option for the average user. With an accessible price, the device offers a stable user experience with good vacuuming ability and supports many smart features.

Similar to other products in the popular segment, the robot also does not support automation features. Users will need to actively clean the device more often for the robot to work effectively.

Design

Xiaomi Robot Vacuum S40 vacuum cleaner has a compact circular design, helping the machine easily reach difficult-to-clean areas such as under chairs, walls or hidden corners in the house.

The body of the Xiaomi Robot Vacuum S40 is finished with sturdy material, giving a solid feeling when used. The white version has a simple design, suitable for many home interior spaces.

However, this color also easily shows dust and dirt after a period of use, requiring users to clean more often to maintain aesthetics.

Like many robot vacuum cleaners in the popular segment, the Vacuum S40 only comes with a compact charging dock and does not support automation features such as washing and drying mops or automatic vacuuming. This is a common technological limitation at this price range and is a factor that users need to consider when choosing.

Underneath the lid is a 520ml dust box, used to store trash and dust during cleaning. Meanwhile, the water tank and cleaning cloth are located at the bottom of the body, which can be easily removed when cleaning or replacement is needed.

The robot uses a V-shaped main brush with large grooves, this design helps to limit the situation of hair getting stuck in the brush shaft. Through actual use, this design has proven effective for hair or short hair.

However, long hairs can still get tangled around the brush, requiring users to periodically check and clean it to ensure performance.

The built-in sensor system allows the robot to quickly detect obstacles such as furniture, stair edges or small objects on the floor. Thanks to its good environmental recognition ability, the robot can reduce collisions and maintain a stable path during cleaning.

In addition, the anti-drop sensor also prevents the robot from falling down stairs or areas with high differences in height. This feature is especially useful when users use the device in houses with many floors.

The sensor system can also detect slippery surfaces and slight slopes to adjust the appropriate speed when moving. Xiaomi Robot Vacuum S40 is capable of moving over thresholds, carpet edges or tile steps up to 20mm high.

Thanks to this, the robot can move seamlessly between rooms, not limited by floor structure.

Performance

Xiaomi Robot Vacuum S40 is equipped with LDS (Laser Distance Sensor) navigation technology, allowing 360-degree scanning of space and creating a map of the usage environment.

Thanks to that, the robot can determine the location and set up a reasonable path, limiting collisions with large obstacles during movement.

Practical testing shows that the robot works stably when recognizing large objects such as tables, chairs, cabinets or walls.

However, for small objects such as wires, socks or tissues, the detection ability is still limited. Users are recommended to clean up these types of objects before operating the robot to ensure cleaning efficiency and avoid jamming the device.

Vacuum S40 supports control and customization via the Xiaomi Home app. Users can create virtual walls to prevent the robot from entering certain areas, select areas to clean, increase the number of cleaning times in necessary locations, or mark carpeted areas so that the robot can automatically adjust the suction power accordingly.

In terms of cleaning performance, the robot is announced to have a maximum suction power of 10,000Pa, supporting four different power levels for users to flexibly adjust depending on the type of surface and the amount of dirt. This level of suction power allows the device to handle common household waste such as hair, food crumbs, ash or small particles.

Compared to products in the same price range, Ecovacs Deebot Y1 Pro has a suction power of 6,500Pa, Dreame D9 Max Gen 2 reaches 6,000Pa, while Roborock Q7 TF+ is equivalent to Vacuum S40 with 10,000Pa.

This spec shows that Xiaomi is making a competitive choice in terms of performance in the entry-level segment.

In addition to the vacuuming function, Xiaomi Robot Vacuum S40 also supports floor cleaning. However, this is only a basic solution with a mop attached to the bottom of the machine, not using a rotating or rolling mechanism like devices in higher segments. Therefore, the ability to clean the floor is only at a sufficient level.

Xiaomi Robot Vacuum S40 also supports voice control via Amazon Alexa and Google Assistant. Users can ask the robot to start cleaning, stop working, return to the charging station or clean a specific area without touching the device.

Summary

Xiaomi Vacuum S40 has a listed price of 5.5 million VND. The product belongs to the popular segment, competing directly with some robot vacuum cleaners in the same price range such as Ecovacs Deebot Y1 Pro, Roborock Q7 TF+ and Dreame D9 Max Gen 2.

Vacuum S40 is equipped with basic features such as strong suction power, sensor navigation and support for connection and control via application. With an accessible price, the device is aimed at ordinary users with basic needs for floor cleaning and the desire to use smart features at a moderate level.

However, similar to many other products in the same segment, Vacuum S40 does not support automatic cleaning features such as automatic trash suction or water filling stations. Users will need to actively clean the dust tray and maintain the device periodically to ensure performance.

With a balance between price and features, the Xiaomi Robot Vacuum S40 can be a suitable choice for ordinary users looking for a basic automatic cleaning device.

Source: https://dantri.com.vn/cong-nghe/danh-gia-robot-hut-bui-xiaomi-robot-vacuum-s40-khoe-nhung-con-gioi-han-20250807215320236.htm