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 Fitness Tracker Bracelet
Available offers (20)
Current
135 mAh battery; supplier claim of 24-hour high-precision heart-rate monitoring
Alibaba
€21.22
Available to order
Alibaba
€19.61
Available to order
Alibaba
€16.95
Available to order
Features
- Battery capacity: 135 mAh
- Bluetooth version: BT 5.0
- 24-hour high-precision heart-rate monitoring
General specs
- Brand: Xiaomi
- Model: Mi Band 4
- Seller: Alibaba
- ID: 62312001656
- Brand: Xiaomi
- Edition: Global Version
- Model Name: Mi Band 4
- Product Type: Fitness tracker bracelet
- Product family: Mi Band
- Battery Capacity: 135 mAh
- Bluetooth Version: BT 5.0
- Heart-rate monitoring claim: 24 Hour High Precision Heart Rate Monitoring
- First listed by seller: October 20, 2026
If you are interested in more details, you can find full information on the seller's page.
€21.22
Last price update: 10/20/26
Available to order
Shipping options
Delivery to 
United States
United States
Available
Fitness tracker bracelet with a 135 mAh battery, BT 5.0, and a stated 24-hour high-precision heart-rate monitoring claim.
Similar products comparison
| This item | Recommendations | |||||
|---|---|---|---|---|---|---|
Xiaomi Mi Band 4 Battery capacity: 135 mAh
|
Xiaomi Mi Band 4 Color screen
|
Xiaomi Mi Band 4 135 mAh battery capacity
|
Xiaomi Mi Band 4 Color screen
|
Xiaomi Mi Band 4 Color screen
|
Xiaomi Mi Band 4 Heart-rate function is stated.
|
|
| 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 | €21.22 | €20.40 | €18.01 | €24.52 | €19.61 | €14.70 |
| 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 |
| Model Name | Mi Band 4 | Mi Band 4 | Mi Band 4 | Mi Band 4 | Mi Band 4 | Mi Band 4 |
| Product Type | Fitness tracker bracelet | Fitness tracker bracelet | Fitness bracelet | Fitness tracker bracelet | fitness bracelet | Fitness bracelet |
| Product family | Mi Band | Mi Band | Mi Band | Mi Band | ||
| Battery Capacity | 135 mAh | 135 mAh | 135 mAh | 135 mAh | 135 mAh | |
| Bluetooth Version | BT 5.0 | Bluetooth 5.0 | 5.0 | 5.0 | 5.0 | Bluetooth 5.0 |
| Display | Color screen | Color screen | Color screen | Color screen | ||
Xiaomi Mi Band 4 Battery capacity: 135 mAh
€21.22
When this device makes sense
Product confidence
Reviews
There are no text reviews yet. If you have experience using this product, please leave a review. It will help other people decide whether this product is right for them.