This may occur if the number of screen wake-up times increases when you raise your wrist in special scenarios.

The power consumption of your watch may increase when you enable Auto heart rate monitoring.

To Increase battery Life: 

• Disable Continuous heart rate monitoring in the Da fit app.
• Disable Notifications in the Da Fit app if you do not need the notification function.
• Disable Raise wrist to wake screen in the Da Fit app if you do not need to use this function.