# Which multisport fitness band has the best battery life for long workouts? — Verified Specification Comparison

> All specification data verified from official manufacturer documentation.

Which multisport fitness band has the best battery life for long workouts?

## Products

### Polar Grit X Pro
```yaml
product: polar-grit-x-pro
brand: Polar
price_gbp: 184.5
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
gps: Built-in GPS and GNSS
screen_size: 1.2in
battery_life: Up to 40 hours in training mode or up to 7 days in watch mode
activity_tracking: 24/7 activity tracking, step count, activity benefit
waterproof_rating: WR100, up to 100 m
heart_rate_monitor: Polar Precision Prime optical heart rate sensor
```

- **Price:** £184.5 [^1]
- **Summary:** The Polar Grit X Pro is a rugged multisport GPS watch with sapphire glass, wrist-based heart-rate monitoring, advanced navigation, and extensive training and recovery tools. It suits outdoor athletes, hikers, runners, cyclists, and triathletes who need durable construction and long battery life.
- **Ideal For:** It suits long workouts with up to 40 hours of battery life in GPS and wrist-based heart-rate training mode, with power-save options extending operation up to 100 hours.

---
## References & Sources
[^1]: PlayBetter, accessed 2026-09-13. https://www.playbetter.com/products/polar-grit-x-pro-premium-outdoor-multisport-watch