Just downloaded new beta for Fenix and I love the new body battery enhancements. Once connect app updates it will be awesome to be able to see this in the app. :
Garmin Fenix 5 Battery Replacement | Run Like Duck – Buy the books!
Garmin Body Battery: Is it useful for health and fitness? - Android Authority
Garmin fenix 5S Plus Sapphire Edition Multi-Sport Training GPS Watch