The [AXTRO Fit 4 fitness tracker](https://www.axtrosports.com/products/axtro-fit-4) battery depletes faster if “Workout Mode” is triggered (real-time heartrate monitoring) and remains activated throughout the day.

The battery life might also deplete faster if it is charged incorrectly. Charge the tracker for no longer than 2 hours. Charging the fitness tracker overnight will cause the battery performance to deteriorate over time.