The Xiaomi Watch S4 Black 47.3 mm is a modern smartwatch that blends refined aesthetics with high-performance technology. Designed for those who demand both style and substance, this timepiece stands out in the wearable market thanks to its large AMOLED display, dual-frequency GPS, and extended battery life. Whether you’re a fitness enthusiast, a tech lover, or a minimalist, the Watch S4 aims to deliver value across the board.
Design and Display
The Watch S4 features a premium 47.3 mm case made from lightweight aluminum alloy, giving it both durability and a sleek look. The elegant black finish, paired with a comfortable fluororubber strap, ensures it fits seamlessly into both casual and formal settings.
Its 1.43-inch AMOLED display offers a sharp 466 × 466 resolution with a smooth 60 Hz refresh rate. With up to 2,200 nits peak brightness, visibility remains excellent even under direct sunlight. The vibrant screen, protected by reinforced glass, is highly responsive and supports always-on display functionality for convenience.
Performance and Features
Powered by Xiaomi’s HyperOS, the Watch S4 delivers a fluid and intuitive interface. It supports Bluetooth calls, music storage, app notifications, and customizable watch faces. While it doesn’t feature LTE, the built-in microphone and speaker enable voice calls via Bluetooth when connected to your smartphone.
With over 150 built-in sport modes, the watch supports everything from running and cycling to HIIT and swimming. Its dual-band GNSS (GPS, GLONASS, Galileo, BeiDou, QZSS) ensures accurate real-time location tracking, even in challenging environments like forests or urban canyons.
Health and Wellness Tracking
Xiaomi equips the Watch S4 with a robust suite of sensors, including:
- Optical heart rate monitor
- SpO₂ (blood oxygen) tracker
- Sleep tracking with REM cycle analysis
- Stress monitoring
- Breathing exercises and sedentary alerts
The heart rate sensor boasts up to 98% measurement accuracy, and wellness data can be synced with compatible mobile health apps for deeper insights.
Battery Life and Charging
Inside the watch is a 486 mAh battery capable of delivering up to 15 days of use on a single charge under typical conditions. Even with heavy use — including GPS workouts and always-on display — users can expect around 7–10 days. Fast charging is supported through a 2-pin magnetic dock, fully recharging the battery in just under an hour.
Pros and Cons
Pros:
- Sleek, lightweight, and durable design
- Bright, crisp AMOLED display with high refresh rate
- Accurate dual-band GPS
- Extensive health and fitness tracking features
- Long battery life with fast charging
- Bluetooth calling and music playback
Cons:
- No LTE or Wi-Fi standalone connectivity
- Limited third-party app ecosystem
- Some advanced health features (e.g., ECG) missing
- Regional limitations on features like NFC payments
Conclusion
The Xiaomi Watch S4 Black 47.3 mm (GPS) is a powerful and elegant smartwatch that balances performance and design. It’s perfect for users seeking premium features without the premium price tag. With a refined interface, accurate sensors, and exceptional battery life, the Watch S4 is a solid contender in the mid-range smartwatch category.
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