Garmin Australia - Manage stress and energy during these tough times. Body Battery is a feature that uses a combination of Heart Rate Variability, Stress, and Activity to estimate the user's energy
Body battery showing the truth about sleeping after a night of drinking. That's a lot of stress for being asleep from 12-4 am : r/Garmin
Using Body Battery and RHR to predict sickness : r/Garmin
Garmin Body Battery: Is it useful for health and fitness? - Android Authority