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Wearables

Xiaomi Watch S3 Review: Great design, but is it worth the HyperOS hype?

By androidpimpFebruary 26, 2025Updated:March 20, 2025No Comments25 Mins Read
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xiaomi watch s3
xiaomi watch s3
Table of contents
  1. Part I: Xiaomi Watch S3 Introduction
  2. Xiaomi Watch S3
  3. Key Takeaways
  4. Xiaomi Watch S3 Specifications
  5. Part II: Xiaomi Watch S3 Review
  6. The package
  7. Unpacking everything (Package Contents)
  8. Taking a closer look into the design of the Xiaomi Watch S3.
  9. Design variants
  10. The next level of customization with interchangeable bezels
  11. Interchangeable watch faces
  12. Interchangeable Straps
  13. Build Quality
  14. Exceptional protection from water
  15. Operation
  16. A responsive and sharp AMOLED display
  17. Main Highlights
    1. What can be done to improve outdoor display visibility?
  18. User interface experience
  19. Software: HyperOS powered
  20. Fitness and sports tracking functionalities
  21. Connectivity and Compatibility
    1. OS compatibility
  22. What about language support?
    1. Does the S3 support NFC? Not so fast
    2. Are 3rd party NFC apps supported?
    3. (OTA) firmware updates
  23. Additional notable features of the Xiaomi Watch S3
    1. Receive important notifications and stay connected with messages.
    2. Voice Assistant Support
    3. Playing music directly from your smartwatch or smartphone is easier than ever.
    4. How does this feature actually work?
    5. Step No. 1
    6. Step No. 2
    7. Experimenting with various Bluetooth devices.
  24. How long does it take to transfer audio files to the watch?
  25. The S3 watch is equipped with a built-in Microphone and speaker as well.
  26. Bluetooth calling function
  27. How is the call sound quality?
  28. Emergency SOS
    1. Features that can be a lifesaver in critical situations.
  29. Independent Navigation System
    1. Option No. 1 – Without a smartphone assistance
    2. Running/Walking Metrics
  30. Option No. 2 – Using a smartphone
  31. Impressive Performance and Battery Life
    1. Charging the Watch
  32. How long does the battery endure on a single charge?
  33. Fitness Tracking and Health Monitoring
    1. How precise is the heart rate sensor?
  34. Pricing and Value for Money of the Xiaomi Watch S3
    1. Comparison with Other Smartwatches in the Market
  35. Does the Xiaomi Watch S3 Truly Live Up to Its Reputation?
  36. Final verdict
  37. Reflections after 10 months of use
  38. Xiaomi Watch S3 Price and Availability, Find out where to buy it now.
    1. Xiaomi Watch S3 [Global Edition]
  39. FAQs
    1. What is HyperOS?
    2. What are the key features of the Xiaomi Watch S3?
    3. What is the battery life of the Xiaomi Watch S3?
    4. Is the Xiaomi Watch S3 worth the price?

Impressive Performance and Battery Life

Another noteworthy feature of the Xiaomi Watch S3 is its battery life. The battery life is a constant concern when it comes to smartwatches. With its powerful 420mAh battery, this watch allows users to effortlessly keep up with their daily activities on just a single charge, eliminating the hassle of frequent charging. Unlike many other smartwatches on the market that require daily charging, Xiaomi’s optimized HyperOS is a smart leap forward in improving battery life and user experience.

Charging the Watch

Xiaomi uses the same universal magnetic charging base connected to a USB cable as the one used in the S2 and S2 Pro watch series. It’s easy to connect to any USB port or a compatible portable charger for maximal convenience.

Xiaomi Watch S3 Charger
Xiaomi Watch S3 Charger

We conducted an experiment to measure the charging rate using a 5V charger. Starting from a completely discharged battery, we successfully charged the watch’s battery to 100% in approximately 50 minutes.

Exploring the Charging Efficiency of the Battery.

Xiaomi Watch S3 Charging Test 1
Xiaomi Watch S3 Charging Test 1
Xiaomi Watch S3 Charging Test 2
Xiaomi Watch S3 Charging Test 2

How long does the battery endure on a single charge?

Xiaomi asserts that with moderate usage, its battery can last up to 15 days. However, in real-world scenarios, particularly with more intensive use, it is likely to last around 10 days. The battery longevity heavily depends on the functions being utilized. For instance, listening to music while engaging in a workout with the GPS activated will significantly drain the battery faster compared to only using the watch for receiving daily notifications.


Fitness Tracking and Health Monitoring

Fitness tracking and health monitoring have become essential features in modern smartwatches, and the Xiaomi Watch S3 does not disappoint in this regard. The watch offers a range of fitness tracking features, including step counting, distance tracking, and calorie monitoring. These features allow users to keep track of their daily activities and set fitness goals.

In addition to fitness tracking, the Xiaomi Watch S3 also offers comprehensive health monitoring features that also exist in a wide range of wearable products designed by Xiaomi. It can monitor heart rate, sleep patterns, and even stress levels. The metrics provided by the watch can be invaluable for individuals seeking to enhance their overall well-being and make proactive lifestyle changes to optimize their health, and it does it well.

How precise is the heart rate sensor?

When we compared the readings from a fingertip pulse oximeter to our standard measurements, we observed that the pulse oximeter readings presented a maximum deviation in the range of approximately ±3 beats per minute.

Xiaomi Watch S3 Heart Rate
Xiaomi Watch S3 (Heart Rate Accuracy Test)
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