The price gap is small, yet the big S4 lasts almost four times longer.
Short answer
Xiaomi Watch S4 47 mm - up to 15 days, 486 mAh, dual-frequency GPS. Xiaomi Watch S4 41 mm - compact (9.5 mm and 32 g), steel and a temperature sensor.
Key differences
| Spec | Xiaomi Watch S4 | Xiaomi Watch S4 41mm |
|---|---|---|
| Display | 1.43", AMOLED, 466×466 | 1.32", AMOLED, 466×466 |
| Battery life | up to 15 days | up to 4 days |
| Battery | 486 mAh | 320 mAh |
| Connectivity | Bluetooth | Bluetooth |
| Navigation | GPS, GLONASS, Galileo, BeiDou, QZSS (L1 + L5) | GPS, GLONASS, Galileo, BeiDou, QZSS |
| NFC | yes | yes |
| Sensors | heart rate, SpO2, barometer, compass, gyroscope | heart rate, SpO2, barometer, compass, gyroscope, temperature |
| Protection | 5 ATM | 5 ATM |
| OS | Xiaomi HyperOS 2 | Xiaomi HyperOS 3 |
| Compatibility | Android 8.0+, iOS 14.0+ | Android 8.0+, iOS 14.0+ |
| Dimensions, weight | 47.3×47.3×12 mm, 44.5 g | 41.2×41.2×9.5 mm, 32 g |
| Price | current prices | current prices |
Specs come from the device pages on Smartphone.ua.
Display
1.43" vs 1.32", both 466×466.
Battery life
Up to 15 vs up to 4 days - the main difference.
Case
Aluminium, 12 mm and 44.5 g vs steel, 9.5 mm and 32 g.
Verdict: who should buy which
- Battery life - Xiaomi Watch S4 47 mm.
- Slim wrist - Xiaomi Watch S4 41 mm.
FAQ
Is there NFC?
Yes, on both.
Do they work with an iPhone?
Yes.
Which is cheaper?
The 41 mm.