Sleep Wearable Form Factor
Compare smart rings, fitness bands, and smartwatches for overnight sleep tracking: comfort, battery habits, and sleep metric depth.
Xiaomi Mi Band 4 135 mAh battery; supplier claim of 24-hour high-precision heart-rate monitoring; color screen; Bluetooth 5.0 Global Version Watch
Available offers (20)
Alibaba
€21.22
Available to order
Alibaba
€19.61
Available to order
Current
135 mAh battery; supplier claim of 24-hour high-precision heart-rate monitoring; color screen; Bluetooth 5.0
Alibaba
€16.95
Available to order
Features
- 24-hour heart-rate monitoring, described as high precision
- 135mAh battery capacity
- Color screen
- BT5.0
General specs
- Brand: Xiaomi
- Model: Mi Band 4
- Seller: Alibaba
- ID: 62160170590
- Brand: Xiaomi
- Display: Color screen
- Edition: Global version
- Model Name: Mi Band 4
- Product Type: Watch
- Product family: Mi Band
- Battery Capacity: 135mAh
- Bluetooth Version: BT5.0
- Heart Rate Monitoring: 24 hour; described as high precision
- First listed by seller: October 20, 2026
If you are interested in more details, you can find full information on the seller's page.
€16.95
Last price update: 10/20/26
Available to order
Shipping options
Delivery to 
United States
United States
Available
Watch with a color screen, BT5.0, and a 135mAh battery. Heart-rate monitoring is described as high precision and is available 24 hours.
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Xiaomi Mi Band 4
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Xiaomi Mi Band 4 Color screen
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Xiaomi Mi Band 4 135 mAh battery capacity
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Xiaomi Mi Band 4 Color screen
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Xiaomi Mi Band 4 Color screen
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|
| Brand | Xiaomi | Xiaomi | Xiaomi | Xiaomi | Xiaomi | Xiaomi |
| Model | Mi Band 4 | Mi Band 4 | Mi Band 4 | Mi Band 4 | Mi Band 4 | Mi Band 4 |
| Price | €16.95 | €19.61 | €21.31 | €18.01 | €21.29 | €22.28 |
| Seller | Alibaba | Alibaba | Alibaba | Alibaba | Alibaba | Alibaba |
| Update | Oct 26, 2026 | Oct 26, 2026 | Oct 26, 2026 | Oct 26, 2026 | Oct 26, 2026 | Oct 26, 2026 |
| Display | Color screen | Color screen | Color screen | Color screen | Color screen | Color screen |
| Model Name | Mi Band 4 | Mi Band 4 | Mi Band 4 | Mi Band 4 | Mi Band 4 | Mi Band 4 |
| Product Type | Watch | fitness bracelet | Smart bracelet | Fitness bracelet | Fitness band | Smart fitness band |
| Product family | Mi Band | Mi Band | Mi Band | Mi Band | Mi Band | Mi Band |
| Battery Capacity | 135mAh | 135 mAh | 135 mAh | 135 mAh | ||
| Bluetooth Version | BT5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 |
| Heart Rate Monitoring | 24 hour; described as high precision | Supported | Heart rate | |||
Xiaomi Mi Band 4
€16.95
When this device makes sense
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