iPhone iOS 12.1 baterry drain very fast iPhone X

[robert1998]

Hello! My iPhone X's baterry is draining very fast and I don't know why. I disabled all the background apps and all the settings that may have an impact on battery life but nothing works. My battery even drains 20-25% during night, when I don't touch the phone. Battery Health is at 98%.
1)What should I do?
2)Is this website safe for downloading iOS 12.0.1? ipsw.me
3)Do you have this problem also?

 

[aakshey]

Share some graphs.

1. DFU restore might or might not be needed.

2. Safe.

3. Sorta. But it is an iOS 12 issue.

 

[robert1998]

I tried to DFU restore and it's acting the same.

 

[friednoodles]

My friend has had this problem starting with 12.1 on an iPhone SE, caused by a Siri-related background task (sometimes it wouldn’t show up in battery stats as from anything in particular, but other times it would show Siri being responsible for 80% of battery usage).

Apple amazingly replaced his entire SE with a new one a few days ago, but restoring the iCloud backup brought the issue back. It also wasn’t resolved by installing the beta, so he’s now had to start completely fresh and it’s fixed. Some obscure/rarely trigger bug.

 

[aakshey]

Try a clean install. Don’t restore from backup.

And share some graphs.

 

[badatusernames]

Just some observations I had during the last couple of weeks. Anytime I restored my phone and did not sign into iCloud I didn't have excessive overnight drain. Once I signed into iCloud the problem started again.

 

[aakshey]

Just some observations I had during the last couple of weeks. Anytime I restored my phone and did not sign into iCloud I didn't have excessive overnight drain. Once I signed into iCloud the problem started again.

What’s the way to fix that?

 

[badatusernames]

What’s the way to fix that?

Just an observation. Not using iCloud isn't a viable option but those were my results.

 

[Minorite]

There were several threads mentioning that disabling True Tone and Screen Time helps, so worth checking. Also will you get a similar behavior in Low Power mode?