Unusually high battery usage

[redsunset2022]

Hello. 

My battery is usually around 60-70% remaining when I go to bed and I'll fully charge it as soon as I wake up. 

This morning my battery was completely flat. I can see no reason for this and a full diagnostic test completed fine. No new apps installed, or apps causing problems. Can anyone spot anything odd from this image?

It left me wondering if the cold temperature has caused this. However, living in a typical house in England with the phone on my bedside table, I can't imagine it's any colder than other places. 

Thanks

[Tourbillon De La Vie]

Try clearing phone cache and restarting the phone. It could be some runaway process especially if you haven't restarted phone for days 

[redsunset2022]

Thanks for the suggestion. I'll do this, although I'm pretty good with clearing the phone's cache and do it after every monthly patch.

[Rikujin]

Dude, It is good to perform a Factory Reset from the recovery, when an Important update is released. Ex. One 5 to One 6, Android 13 to Android 14, and do a clean setup (do not upload back up), once the Update is installed.

And It is important to do a battery calibration sometimes.

[BandOfBrothers]

@redsunset2022 

Network Connection is pretty weak so the phone would be working harder to maintain connection. 

Also use the optimisation tool in your Device Care Section to see if that shows any unusual high usage on the battery. 

Safe Mode is a good troubleshooting step too. 

> Safe Mode  > https://www.samsung.com/uk/support/mobile-devices/how-to-start-my-galaxy-device-in-safe-mode/ turns off downloaded apps and themes etc which may highlight an app or theme that's causing conflict. 

If I can be of any further help then please don't hesitate. Take care.  😎 

[redsunset2022]

Thank you BandOfBrothers, I always appreciate reading your comments.  

My network connection with my phone is good 100-400mbps typically, and mobile coverage is 5G.  I do have battery 'auto-optimisation' set, and it says the last "auto memory cleaning" completed before the battery went off. Compared with previous nights, it does look like some errant processes were using battery which wouldn't normally at those times.  (Always On Display, Google Play, System UI). 

I'll turn on the auto-reboot and I have cleared my cache so hopefully will not see the issue again.

[Bigtasty65]

No need for a factory reset. Post a screenshot of what apps are using the most battery!.