Battery draining quickly on my Note 9 after upgrading to Android 10

[Android Central Question]

After I updated my Note 9 to Android 10 my battery drain quickly. I charged it to 100% before going to bed, I ran device care then out the office down and went to bed. When I got up 7.5 hours later, the battery had drained 25% and the phone feels warm.
I've tried updating all my apps and clearing the cache but nothing seems to fix the problem. It wasn't like this before updating.

 

[mustang7757]

What's showing up high on your battery stats?

'll leave a Link to register so you can communicate here as a guest account you can only post questions but can't reply.

https://forums.androidcentral.com/showthread.php?t=409154

 

[B. Diddy]

Welcome to Android Central! Also see if this happens in Safe Mode: https://www.t-mobile.com/support/devices/android/samsung-galaxy-note9/safe-mode-samsung-galaxy-note9

 

[fleshtwister]

Last night I charged it to 100% and then put it in Safe Mode as well as activated Do Not Disturb, when I checked it 9 hours later it had only gone down 3%

 

[mustang7757]

Hi , welcome!
That's good , but should of did safe mode without DND. What did you see high on your battery stats?

 

[fleshtwister]

I always have my phone on DND when I'm sleeping. I haven't checked the battery usage but will tomorrow morning. Thanks

 

[B. Diddy]

If the problem persists after booting out of Safe Mode, then try also wiping the cache partition: https://www.t-mobile.com/support/de...te9/wipe-cache-partition-samsung-galaxy-note9

 

[fleshtwister]

How can I see what is using high battery usage without going through every app one by one?
Last night it drained from 100% to 83% in 6.5 hours.

 

[fleshtwister]

When I check battery usage it just shows a graph and below that it shows apps but it says how much they were used but not since fully charged

 

[B. Diddy]

Charge it up to 100%, then use it normally until it's down to about 30%. Then look at the app usage in the battery stats.

 

[fleshtwister]

Last night I charged the phone to 100% and turned the wifi off. When I will up it only was down 4%. Why would wifi cause my battery to drain so much? I've stopped using WiFi and my battery lasts do much longer.

 

[B. Diddy]

How's your wi-fi signal? If it's weak, then just like with a weak cell signal, I think it can lead to increased power drain as the radio tries to boost the signal

 

[fleshtwister]

WiFi is very strong. I'm guessing I'm going to have to do a factory reset

 

[mustang7757]

Sometimes it doesn't hurt to do that after a new Android version

 

[B. Diddy]

It wasn't entirely clear to me -- did you already try wiping the cache partition?

 

[fleshtwister]

Yes I've cleared the cache

 

[mustang7757]

After a andriod update usually clearing cache is all that's needed but in your case should do factory reset as some things from previous versions might of been left back

 

[Syndirail]

Hey there!

Where you able to identify/fix the issue?

I am facing the exact same problem, did a Factory reset even, but if either Wifi or LTE is enabled, my Note suddenly drains 15-20% overnight.
Battery manager does not show any app with usage that high. So it has to be some background activity while connected to the internet.

Anyone got any advise?

Edit: This also impacts my SOT, getting around 3h less with Wifi or LTE enabled which sometimes causes me to not even make it through a whole 24h on one charge with moderate use.