Fenix 8 47mm solar battery life?

This seems to be an ongoing issue.  I wish I had been aware before buying.  I read and watched all the online reviews but nobody mentioned this issue.  Out of the box I was getting about 20 days.   However after the latest software update I am now down to 10-12 days.  I have all the usual settings (backlight, etc.) set for longer battery life.  I hope this is a software issue that Garmin can fix (vs. hardware issue).

If the advertised battery life was 10-14 days i would be happy and have no issues. I am probably not alone. I believe the problem is the flase advertising. 

Tell me your an apple watch user without telling me your an apple watch user.

I am not. Own nothing Apple. Have an android phone and have had Garmin watches for 10 years. 

1. Awesome. Yet another battery life post we dont need because someone was too lazy to search.

Since the end of November I have been recording the battery level of my F8 51mm Solar several times a day. With a downloaded display design, around 60 notifications per day and around 3 hours of GPS activity per week, I got a battery consumption of around 60% per week. Since then I have been looking for the culprits for the high battery consumption. With the Industrial display design and data fields that hardly change during the day (sunrise and sunset, readiness for training,...) I came to around 4% battery consumption per day. I kept trying, installed the "40d mip performance" display theme, didn't turn on the seconds and reached 3% per day.

I also placed the watch in the sun (363 kLux) for 140 minutes and was able to increase the battery level from 19 to 21%. it works

You must be the expert. 

Interesting thought on the watch faces. My battery drain was much better (5% per day) on the face with watch hands which I used for a while. Now that I think about it battery usage increased when I switched to a stock digital face with more data fields. 

When I use informative display designs with lots of data fields, I record a battery consumption of 6 - 8% per day. Economical watch faces use approximately 3% per day. I have set up a lavish display design and an economical one and use them however I feel like. Many notifications also require a lot of battery.