Hello,
I have a problem with battery on my 5s. The battery comes from 100% to 0% in 20-22 hours.
I install 2.9 software. There is no trainings. Bluetooth connection disabled.
Is there anything else to do?
i had an issue where a watch face took me from 80 to 30 in like 2 days. Maybe thats the problem. I switched back to a simple watch face and ive had the remaining 30 for the last 5 days and still have 12%. Trying to get this thing to run out completely to zero but the battery life is too good!
Try this fix process below as reported on previous Fenix 3 forums for the same battery drain issue.
Do a master reset (20s holding 'Light' button), upon reboot plug it in and charge to 100%
Make sure its 100%
Battery drains are more to do with the OS misreading the battery charge and safe guards preventing over charging - but the prob is the OS has misread the charge and believes it to be higher than It actually is ( not exactly sure how but its something to do with capacitors), and it disables charging when battery could be 1/2 empty ( visually it appears the watch is still under charge but at 100 but behind the scenes charging is off!)
Master reset removes the caching effect and forces a full proper recharge.
I check and confirm if you use in settings/ system/ save each secund , then HR average after week will be lower about 5 pic, and battery consumer more battery.
Fyi
After restart default save each secund is turn off, so battery is will be not go down rapidly