Capacity
- Amazfit Helio Strap
- 232 mAh battery capacity
- Xiaomi Watch S4 41mm
- 320 mAh battery capacity
Wearable comparison
Amazfit Helio Strap vs Xiaomi Watch S4 41mm
Compare battery life, health tracking, display and fit.
01Selected  Amazfit Helio Strap
KSh 22,000Out of Stock | 02  Xiaomi Watch S4 41mm
KSh 23,360In Stock |
|---|
Add to comparison
2 spaces available
Google Fitbit AirKSh 21,500
Fitbit EdgeKSh 28,000
AmazFit BalanceKSh 22,000
Samsung Galaxy Watch 7KSh 22,500
Amazfit Active 2 Premium RoundKSh 22,000
Amazfit GTR 3 ProKSh 20,000
Apple Watch Series 8KSh 50,000
2 of 4 products
Our quick verdict
The Amazfit Helio Strap, a screenless tracker you read in the Zepp app, lasts longer between charges (10 days), gives daily BioCharge energy levels and is lighter to wear all day, while the Xiaomi Watch S4 41mm, a smartwatch with a 1.32-inch OLED screen, has a bigger battery (320 mAh) and a sturdier stainless steel build and is slimmer.
Portability
- Amazfit Helio Strap
- 20 g
- Xiaomi Watch S4 41mm
- About 32 g
Display
- Amazfit Helio Strap
- Screenless
- Xiaomi Watch S4 41mm
- 1.32-inch OLED display, 60 Hz, 352 ppi
Software
- Amazfit Helio Strap
- Zepp
- Xiaomi Watch S4 41mm
- Xiaomi HyperOS 3
Connections
- Amazfit Helio Strap
- Bluetooth 5.2
- Xiaomi Watch S4 41mm
- Bluetooth 5.4
Key differences
The main differences to help you choose.
Amazfit Helio Strap
- Longer battery life: up to 10 days (vs 8).
- Lighter: 20 g (vs about 32 g).
- Screenless: worn day and night, with results read in the Zepp app.
- Daily BioCharge energy levels.
- Syncs with third-party apps such as Strava and Apple Health.
Xiaomi Watch S4 41mm
- Bigger battery: 320 mAh (vs 232 mAh).
- Screen on the wrist for the time, notifications and workout stats.
- Stainless steel case (vs plastic case).
- Slimmer: 9.5 mm thick (vs 10.59 mm).
- Newer Bluetooth 5.4 (vs 5.2).
What matters most to you?
6 priorities selected.
| Priority | Amazfit Helio Strap | Xiaomi Watch S4 41mm |
|---|---|---|
| Battery life | 232 mAh battery | 320 mAh battery |
| Portability | 20 g | About 32 g |
| Display | Screenless | 1.32-inch OLED display, 60 Hz, 352 ppi |
| Software | Zepp | Xiaomi HyperOS 3 |
| Connections | Bluetooth 5.2 | Bluetooth 5.4 |
| Sensors | BioTracker 6.0 PPG, 5 PD + 2 LED | Heart-rate and blood-oxygen sensor, accelerometer |
| Sleep tracking | Sleep HRV, sleep stages including REM | Sleep tracking, sleep trend reports and supported improvement plan |
| Charging | Magnetic charging head | 2-pin magnetic charging dock |
| Health & wellness features | BioCharge energy levels, continuous heart rate per second | Heart rate, blood oxygen, stress and skin-temperature monitoring |
| Controls / buttons | Screen-free smart band with indicator lights | Rotatable crown and lower button |
| Wrist size | 145–205 mm | 120–190 mm (black, mint green, white) |
| Strap / band | 22 mm nylon, hook-and-loop fastening | Fluororubber (black, mint green), leather (white) |
| Training & outdoor features | PeakBeats, real-time Bluetooth heart-rate broadcast | Workout reports, training effects, load and recovery |
| Case material | Fibre-reinforced polymer | Stainless steel |
Tick a topic above to see how each product answers it.
Detailed comparison
Explore the full specifications, section by section.
These products have the same published specifications.
Similarities
- Both are water resistant to 50 m.
- Both connect over Bluetooth.
In summary
Get the Amazfit Helio Strap if you want a screenless tracker with longer battery life and daily BioCharge energy levels, or the Xiaomi Watch S4 41mm if you would rather have a bigger battery and the time, notifications and workout stats on your wrist.
Back to compared products ↑
