A 41 mm case and just 9.5 mm thick integrates a 1.32″ AMOLED display (466 × 466 px) capable of 2200 nits, along with next-generation optical sensors and a 320 mAh battery with up to eight days of typical use. It's all handled by HyperOS 2, with Bluetooth 5.4 connectivity for calls and multi-constellation GPS, while maintaining a featherweight 32g.
Ultra-compact and customisable design
The aluminium alloy chassis is combined with an interchangeable bezel and rotating crown; the standard fluorocarbon strap removes without tools and fits any 20mm bracelet. Ideal for smaller wrists without sacrificing presence.
High-brightness display
The AMOLED panel achieves 60 Hz and maintains direct sunlight readability thanks to its 2200 nits peak. Includes colour Always-On mode and more than 200 dials, some animated with mascots that evolve according to activity.
24/7 health and sport
Monitors heart rate, SpO₂, stress and sleep with a new optical module that promises up to 98% accuracy. Offers over 150 sport modes and Bluetooth heart rate broadcasting for external equipment.
Autonomy and fast charging
320 mAh battery provides up to 8 days (or 3 days with AOD active). Five minutes on the magnetic charger adds up to 48 hours of use, useful for short trips.
Ruggedness and connectivity
With 5 ATM certification, it withstands swimming in pools and cold showers. GPS with support for Galileo, BeiDou, QZSS and GLONASS improves accuracy in the city, while optional NFC enables contactless payments in compatible regions.
Our expert opinion
The Xiaomi Watch S4 (41mm) gets it right by concentrating the experience of the 46mm model in a lighter form factor, without sacrificing brightness or sensors. Compared to an Apple Watch Series 9 41 mm, it offers significantly better battery life and value for money, although it lacks the ECG and iOS integration that its rival boasts. Compared to the Samsung Galaxy Watch 7 40mm, it stands out for its interchangeable bezel and express charging, but misses out on Wi-Fi connectivity and the advanced app shop. If you prioritise lightness, battery life and a fluid HyperOS ecosystem, the Watch S4 is one of the most balanced options on the market, while maintaining the Chinese firm's renowned value for money.
Technical specifications Xiaomi Watch S4 41 mm White:
- General parameters
- Brand: Xiaomi
- Product: Smartwatch
- Model: Watch S4 (41 mm)
- Display
- Size: 1.32"
- Type: AMOLED
- Resolution: 466 x 466, 326 ppi
- Maximum brightness: 2200 nits
- Connectivity
- Connectivity: Bluetooth 5.3
- App: My Fitness
- Sensors
- Health:
- Optical heart rate sensor
- SpO2 sensor
- Motion and environmental:
- Accelerometer
- Gyroscope
- Ambient light sensor
- Electronic compass
- Barometer
- Hall sensor
- Battery
- Capacity: 320 mAh
- Battery life (typical use): 8 days
- Design
- Body: Aluminium alloy
- Strap: Leather
- Water resistant rating: 5 ATM
- Dimensions: 41.2 x 41.2 x 9.5 mm
- Weight: 32 g (without strap)
- Colour: White
- Package contents
- 1 x Xiaomi Watch S4 41 mm White
- 1 x Charging cable
- 1 x User manual
