I have had a Fenix 5s six months now and the battery drain while in training use is ridiculous. Today I ran two hours and it used 50 %. Lately it was standard for it to drop 20% fo an hour. Today though I wore a chest HR monitor so wonder if that caused the increase. I have also had the backlight on the whole time during an activity so cars could see me in the dark. I wouldn’t have expected it to use that much. Is this normal?
