Battery issues iphone 13 pro

[Weasel99]

Hello.

Since around 2 months ago I'm having trouble with my iphone battery. Even with little usage I can only around the day.
I had 2h 42m "screen on" and 3h 9m "screen off" today and i'm already at 25% remaining capacity.
For example "photos" took 3% off with 4 minutes of usage. safari was 14% in 15 minutes. So its not a single app that is draining the battery, it looks like every app is draining way too much. (and it definitely wasn't that bad a few months ago).
I'm currently on 15.5 but obviously that problem existed before.
I restarted the phone (force restart), turned off background app refresh for almost every app.
I first suspected reddit, even if I almost don't use it, another app it on top of the "battery" list with a high battery percent per minutes of usage value.
The battery health is at 100%. I'm usually using the magsafe magnetic thing to recharge my phone.
I don't want to reset my phone completely if there is another thing to work this out.

I'm thankful for any kind of advice.

 

[jav6454]

Have you looked into the battery usages? iPhone OS will give you a breakdown of what apps are using the most power.

 

[Weasel99]

Yeah I did. It’s like all the apps are using more than they should. No app is really higher than the others

 

[jav6454]

Is your cell connection on 5G/mmW or on LTE?

 

[HMI]

what brightness level is your display using?

 

[SebbOnf91]

Turn off background app refresh or for the apps that uses battery in background and see how it's behaving or try a itunes restore

 

[Weasel99]

After a few days I found the problem. It was the „home assistant“ app. When I first installed it, I have it all the access to sensors and so on (mostly to try stuff with automations).
I already restricted the access to sensor data, background refresh and so on. But it seems that the app still was able to do those things.
As soon as I deleted the app, the battery drain went down.
Today I reinstalled the app and didn’t give it any access to anything.

Funny thing is: the app never showed up in the battery overview.

 

[jav6454]

That is odd, all apps should appear within the battery overview.

 

[Weasel99]

So how is this possible?