That is definitely not normal. Something else must have caused the battery drain. It is worth rebooting both the watch and the iPhone before using the app again.I have a question: last weekend I turned off my AW S5 Bluetooth connection to force inner GPS avoiding relying on my iPhone 8 GPS , while using WorkOutDoors (v4.5.5); This killed my AWS5 battery in 35 min (it was at 70% at the start and battery health shows 83%); the question is: this performance is normal? I mean using inner AW GPS should kill its battery that fast?