Balance 2 vs Xiaomi Watch S4
Verified 2026-10-04
A factual specification comparison between the Balance 2 and the Xiaomi Watch S4.
Image: Zepp Health Corporation
AmazfitBalance 2
Fully verifiedSmartwatchReleased · 2025-06-01
Specs: source
View full specs
Image: Xiaomi Corporation
XiaomiXiaomi Watch S4
Fully verifiedSmartwatchReleased · 2025-02-01Announced 2025-02-01
Specs: source
View full specsKey differences
| Specification | Balance 2 | Xiaomi Watch S4 |
|---|---|---|
| Water resistance | 10 ATM | 5ATM |
| Case dimensions | 47.4 x 47.4 x 12.3 mm | 47.3mm x 47.3mm x 12.0mm |
| Display | 1.5-inch AMOLED, 480x480, 323 ppi, sapphire glass protection, up to 2,000 nits | 1.43-inch AMOLED display with HBM brightness |
| Peak brightness | 2000 | 1500 |
| Battery capacity | 658 | 486 |
| Battery life | Up to 21 days typical use | Up to 15 days of typical usage |
| Bluetooth | Bluetooth 5.2 | Bluetooth 5.3 |
| Operating system at launch | Zepp OS 5 | Xiaomi HyperOS 2 |
| Health sensors | Optical heart rate, SpO2, temperature, barometric altimeter, geomagnetic sensor | Heart rate sensor (with blood oxygen/SpO2 sensor), Accelerometer, Gyroscope, Ambient light sensor, Electronic compass, Barometer sensor, Hall sensor |
Facts shown above are the specifications where both devices have a confirmed value and those values differ — not an indication that either device is better.
Specifications
| Specification | Balance 2 | Xiaomi Watch S4 |
|---|---|---|
| Design & Build | ||
| Water resistance | 10 ATM | 5ATM |
| Colors | — | Silver, Black, Rainbow (bezel and strap kit standard), Dual-Tone Ceramic Blue-gray (special edition) |
| Weight | 43 g (without strap) | Not disclosed |
| Case dimensions | 47.4 x 47.4 x 12.3 mm | 47.3mm x 47.3mm x 12.0mm |
| Build materials | — | Aluminum alloy frame |
| Display | ||
| Display | 1.5-inch AMOLED, 480x480, 323 ppi, sapphire glass protection, up to 2,000 nits | 1.43-inch AMOLED display with HBM brightness |
| Peak brightness (nits) | 2000 | 1500 |
| Memory & Storage | ||
| Storage (GB) | 32 | Not disclosed |
| Battery & Charging | ||
| Charging time | — | 2-pin magnetic charging dock; 5 minutes of fast charging delivers 2 days of usage |
| Battery capacity (mAh) | 658 | 486 |
| Battery life | Up to 21 days typical use | Up to 15 days of typical usage |
| Connectivity | ||
| Wi-Fi | 2.4GHz Wi-Fi | Not disclosed |
| Bluetooth | Bluetooth 5.2 | Bluetooth 5.3 |
| Contactless payments | — | NFC supported (availability varies by region) |
| Positioning | — | Dual-frequency GNSS chip: GPS, Galileo, GLONASS, BeiDou, QZSS (5 satellite systems) |
| Software | ||
| Operating system at launch | Zepp OS 5 | Xiaomi HyperOS 2 |
| Phone compatibility | — | Requires a Xiaomi smartphone or pad running Xiaomi HyperOS 2 with the Mi Fitness app for full feature support (including Xiaomi Smart Hub) |
| Security & Sensors | ||
| Health sensors | Optical heart rate, SpO2, temperature, barometric altimeter, geomagnetic sensor | Heart rate sensor (with blood oxygen/SpO2 sensor), Accelerometer, Gyroscope, Ambient light sensor, Electronic compass, Barometer sensor, Hall sensor |
Sources & verification
Xiaomi Watch S4
Verified 2026-10-03- Xiaomi CorporationManufacturer specificationsTier 1
Tier 1 sources are the manufacturer's own product pages, technical specification sheets, or support documentation. Tier 2 sources are reputable independent technical references, used only for facts that couldn't be confirmed from official documentation.