Battery flaw in Fenix 7X Pro?

Well, experimentally I wear my 7pro only in energy saver mode, no wifi, no heart rate, no backlight, no flashlight, no other health settings, no workout, no GPS, etc.
When fully charged the watch says 57 days, at the moment since the last 12 days only a capacity of 36 days. So the prediction is not correct at all.
On the other hand, the battery consumption (battery widget) is 3.14% per day since the last charge. Result after 12 days = 37.7 %. If I subtract the result from 100 %, it is 62.3 %.
The watch also shows this 62 % but with the 36 days mentioned.
Conclusion: The percentages are correct, the indication in days is at least doubtful.

Yesterday, I charged my 7x Pro Sapphire Solar, and it said I had 28 days. I keep everything on except for the O2 sensor. I keep the backlight at 20%, and wrist gestures on for both regular use and during activities. I have GPS set to auto, and did a GPS workout (and used a run/walk workout that I created) yesterday that lasted about half an hour. I have calls/text/app notifications turned on for both regular use and during activities. Also, I don't use any third party apps. Just the ones that come with the device.

Today (a full day later), it says I have 27 days left, and 96% of battery.

I don't know what to tell you. Mine sure seems like it's working as advertised.

If you are using any third party apps, maybe try removing them, do a soft reset, and test it again?

I got it on 12/29/2023, and I did not follow those steps. Just connected it and started using it. I am using the default watch face that came with it...

I am in the same boat. I've got at best 14 days between charges on my fenix 7x pro SS. Screen set to 5% manual. Hr on 24/7, o2 manual, gps auto. Avg maybe 45mins a day with activities. Only maybe 1-2 hour a week gps. I have notifications on. I'm starting a test with battery saver on sleep now to see if that makes a difference. But regardless I'm getting only half the advertised battery life with very conservative settings. I'm debating on whether to return it. 

I am in the same boat. I've got at best 14 days between charges on my fenix 7x pro SS. Screen set to 5% manual. Hr on 24/7, o2 manual, gps auto. Avg maybe 45mins a day with activities. Only maybe 1-2 hour a week gps. I have notifications on. I'm starting a test with battery saver on sleep now to see if that makes a difference. But regardless I'm getting only half the advertised battery life with very conservative settings. I'm debating on whether to return it. 

I still assume there is some flaw. I was hoping to get someone from Garmin to chime in and see if they get similar results, but might need to wait for the next Enduro or Fenix 8. These threads go mostly ignored or unnoticed. The Fenix 7X Pro seems to drain 2x as fast as the Fenix 7X (Non-Pro), with the same settings, without any activities and just sitting on a desk. I've been able to reduce the drain (without activities) to about 3% a day by disabling the phone connection and enabling airplane mode. Backlight always off. For sleep mode, I have battery saver on, but the HR is turned on. I'd like to go back to the Fenix 7X (Non-Pro), but the 7X Pro display is just so much better...

Garmin website says UP TO 28 days, which usually means 28 days in very optimal conditions, or very specific conditions. I don't see why it should be 28 days for everybody considering how much impact the usage has on battery, and how different could be between person to person.

There are people commenting in other threads about short battery life, but they have like 40% screen brightness, which is absolutely a battery killer, and nobody knows how long that screen stays on (4, 8 30 secs?) and how often they use the screen (which btw also turns on with notifications and/or gesture).

Also, how many activities with GPS are recorded, for how long? Etc

We don't know, for example, how many people uses the flashlight, how often, for how long, which is another battery annihilator.

And so on.

One thing that could help to understand battery usage is a sort of recap, like for example Apple has done on the iphone. There is a graph that shows battery drain over time, and which app has been used the most.

It could be very helpful to debug problems in the watch/firmware or make people realize how often they actually use some feature that could potentially drain a lot of battery.

This could be done both on the watch and connect, it doesn't look that difficult to implement, but it's up to Garmin.

I completely understand different use cases. I'm mostly curious of two things:

1 - Can/should we expect the same battery life as the original Fenix 7X with a Fenix 7X Pro?

and 

2 - Can anyone get less than a 2% daily drain from the Fenix 7X Pro in battery saver mode, not wearing the device, left alone in a drawer, with everything turned off? What does Garmin get in their lab/testing?

The #2 should rule out all of the variables such as activities, backlight, flashlight, notifications, etc.

I think your idea is great. It would be nice to have an app that could analyze and report on where the draw is coming from, allowing users to gain insight into their actual usage. Are you volunteering to write this?

1- I don't know, since I have a F7X pro and an old F5. But even for someone who has both watches I don't know how to 1:1 compare. Using one watch for each wrist should be a good start, assuming the battery on the old watch is still on par and all the settings and usage are the same, but recording and sync activities could be a problem, using just one phone and one account.

Also, using two phones and two account could point out bluetooth connection problems on phone side or watch, or garmin connect bugs during sync, for example, which I'm thinking are the primary suspects here.

2- I'm not sure what's the purpose of this test: If you are ruling out any variables there's no much to understand about how battery drains, if you leave the watch doing nothing and disconnected from everything what sort of information you'll get? Except getting an unrealistic usage scenario...

I'm not a developer, sorry :) but maybe there's already something like this on CIQ? I'm thinking though that this Battery usage widget should be a garmin native feature, since I guess it has to be rooted in the core functions of the watch, and not through API or SDK or whatever.