# Which fitness tracker has the longest battery life for extended use? — Verified Specification Comparison

> All specification data verified from official manufacturer documentation.

Which fitness tracker has the longest battery life for extended use?

## Products

### Amazfit Bip 5
```yaml
product: amazfit-bip-5
brand: Amazfit
price_gbp: 52.46
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
gps: Yes (4 GNSS satellite systems)
screen_size: 1.91 in
battery_life: 10 days (typical use)
activity_tracking: 120+ sports modes, step distance calories sleep stress SpO2
waterproof_rating: IP68
heart_rate_monitor: Yes (optical PPG sensor)
```

- **Price:** £52.46 [^1]
- **Summary:** The Amazfit Bip 5 is a lightweight smartwatch with a large 1.91 in LCD, optical heart-rate and SpO2 sensors, built-in GPS using four GNSS systems, IP68 water resistance, and up to 10 days typical battery life (26 days in battery saver). It supports 120+ sports modes, Bluetooth calling, and runs Zepp OS for app and watch-face customization, suited to budget-conscious users wanting phone-call and health features. 
- **Ideal For:** Ideal for extended use because it offers up to 10 days typical battery life and a battery-saver mode that can extend life to 26 days.

### Garmin Forerunner 965
```yaml
product: garmin-forerunner-965
brand: Garmin
price_gbp: 374.77
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
gps: Yes (4 GNSS satellite systems)
screen_size: 1.91 in
battery_life: 10 days (typical use)
activity_tracking: 120+ sports modes, step distance calories sleep stress SpO2
waterproof_rating: IP68
heart_rate_monitor: Yes (optical PPG sensor)
```

- **Price:** £374.77 [^2]
- **Summary:** The Amazfit Bip 5 is a lightweight smartwatch with a large 1.91 in LCD, optical heart-rate and SpO2 sensors, built-in GPS using four GNSS systems, IP68 water resistance, and up to 10 days typical battery life (26 days in battery saver). It supports 120+ sports modes, Bluetooth calling, and runs Zepp OS for app and watch-face customization, suited to budget-conscious users wanting phone-call and health features. 
- **Ideal For:** Ideal for extended use because it offers up to 10 days typical battery life and a battery-saver mode that can extend life to 26 days.

---
## References & Sources
[^1]: TechRadar (news listing with retailer price), accessed 2026-06-10. https://www.techradar.com/health-fitness/smartwatches/amazfits-new-low-cost-wearable-packs-in-a-big-display-and-26-days-of-battery-life
[^2]: Best Buy, accessed 2026-06-10. https://www.bestbuy.com/product/garmin-forerunner-965-gps-smartwatch-47-mm-fiber-reinforced-polymer-carbon-gray-tlc-titanium-2023/JXF9YF4C26