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iPhone 12 Pro 12 Pro / Max Night battery drain [Merged]

I’m losing 10-12% overnight with my mini, which seems excessive. I’m hoping to figure out what is causing this. I use dnd overnight, no background refresh, no exposure notification.
 
Last night I turned off 5G and went with LTE only. 0% drop in battery (previously was dropping 5% each night with it on).
I had already changed a few settings:
  • Turned off the Exposure Notifications (when I was seeing the 20% drop)
  • Played with my Privacy settings again
  • DND is on from 11p-7a and that remained
At least for me on 14.2.1, it seems my 12PM was between the phone re-indexing, the exposure notifications and 5G.

I am going to add the Exposure Notifications back and see if that changes things over the next couple of days.
 
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camilasaunder89 said:
Maybe due to background apps the battery drains at night. You can try to disable the background apps in the setting.
Click to expand...
I have a few apps that do background refresh, and I never had drain with my previous
eyespy03 said:
Last night I turned off 5G and went with LTE only. 0% drop in battery (previously was dropping 5% each night with it on).
I had already changed a few settings:
  • Turned off the Exposure Notifications (when I was seeing the 20% drop)
  • Played with my Privacy settings again
  • DND is on from 11p-7a and that remained
At least for me on 14.2.1, it seems my 12PM was between the phone re-indexing, the exposure notifications and 5G.

I am going to add the Exposure Notifications back and see if that changes things over the next couple of days.
Click to expand...
glad it’s fixed it for you. I’ve not had 5G on at all as I’m dual dim, and yet I still get the drain
Last night though it was only 5% rather than 15-20%, as I turned off iPhone tracking sleep, turned off “networking & wireless” in system services part of location services. I also went to 14.3 beta so I don’t know which of these 3 things made the difference
 
Still happening. I will try it again tonight, leaving my phone on flight mode.

I have ...

  • Background Refresh: Off
  • Push for Mails: Off, Automatic set to 1 hour
  • Location services: Most are off
  • Siri: Off
  • Automatic App download / update: Off
  • All apps are swiped "off" before I go to sleep
  • One reboot before sleep
  • 5G: off
  • Widgets: No 3rd party widgets enabled
  • COVID Tracing thing: off
  • DNS: On between midnight and 7 am
 
As always I suggest:
charge your new iPhone every night for at least 1 week

It will do some indexing and whatever a new iPhone does the first days ... and yes, at night when you don't use it.
 
iSuzan said:
As always I suggest:
charge your new iPhone every night for at least 1 week

It will do some indexing and whatever a new iPhone does the first days ... and yes, at night when you don't use it.
Click to expand...
Did that and no problem with my Pro Max. charged to 100% 8h later still 100%.
 
contacos said:
ok so last night I put it in flight mode with bluetooth and wifi still active and for once it only drained about 4 %. Maybe it is the Qualcom chip after all ...
Click to expand...
It’s not that because it only seems to happen at night. If it was the modem then you’d lose 30% just in background during the day and that doesn’t happen
 
I'm glad this thread exists.

I thought I was the only one having this problem. My iPhone 12 Mini is losing 10-15% overnight while I'm used to losing 3% capacity with my previous iPhones (11, XS, X, etc.) Hopefully the next firmware update will address this issue. It is not a big deal but with my Battery OCD... :)
 
This thread is kind of weird for me. Leaving your electrical device on overnight losing less than 10% battery.. not really an issue in my humble eyes.
 
For real?
The product has an advertised "up to" 50h audio playback time.
This means that 1 hour of audio playback should take something like 2% of battery at best. But let's say this is quite worse and is 3-4%

An overnight session, which giving 10-15% is equivalent to 4-5 hours of music playback (according to the specs always)
Yeah not really an issue... when having a device doing nothing, brings drainage to having the device playing music :)
 
After losing 0% the night before last with going to LTE and having exposure notifications off/disabled, I added the Exposure Notifications back in. Back to a 6% drop in battery, so that has to be playing some role in it.
 
eyespy03 said:
After losing 0% the night before last with going to LTE and having exposure notifications off/disabled, I added the Exposure Notifications back in. Back to a 6% drop in battery, so that has to be playing some role in it.
Click to expand...
Yeah I turned off Networking & wireless in the location services settings , seemed to help and it may be related to the U1 chip and it constantly polling for nearby objects or something
 
rgschmidt said:
I'm glad this thread exists.

I thought I was the only one having this problem. My iPhone 12 Mini is losing 10-15% overnight while I'm used to losing 3% capacity with my previous iPhones (11, XS, X, etc.) Hopefully the next firmware update will address this issue. It is not a big deal but with my Battery OCD... :)
Click to expand...
12 Mini over here too. Last night (as it has done most other nights) it drained battery at virtually the same rate as it was when I was using it all day (12% in 9 hours). You’re right - not a big deal, especially when the every day battery life is better than expected, but it’s clearly an indication that something is wrong.

I use all the obvious battery saving tips, and have also tried a completely fresh reinstall of the phone (started fresh with no apps etc), and no noticeable difference, though i could be back in the indexing phase since it’s just been 3 or 4 days since starting fresh, but it was about this exact same drain rate before the reinstall.

Who knows. Trying to enjoy the day to day battery, not worry much about it when possible, and hope for a software fix, but I fall under the battery OCD umbrella as well.
 

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I had the same problem with my 12 Pro Max. Battery used to drain around 22 to 25% every night(8 hours). I think I found a solution for my device. Turning off Location for 'Networking and Wireless' helped. Seems like U1 chip is searching for location in the background. With this I was able to reduce the drain to 12% during night. Then I turned off 'Allow Siri When Locked'. With this my battery drain yesterday was just 3% over a period of 12 hours with the phone being unused during this period.

My phone is set to connect to 4G network only. No 5G at my location.
 
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Also suffering of overnight battery drain on my 12 mini... losing around 15% to 30% every night.Tried everything,the only thing that works is turning on the airplane mode,with this i wake up with a fresh 100% battery,so is obvious a modem problem. I advide you to follow this thread on Apple Communities: https://discussions.apple.com/thread/251956914?answerId=253988134022&login=true&page=1
The latest news is that anyone that installed the new beta (14.3) is no longer having this issue.
 
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Gotta add my experience in here with iPhone 12 Mini: My Mini has been losing 30% battery during 8 hour work day when the Mini is at home idling with only wifi on. Last night I tested with Wifi off and Mini lost 20%. Latest iOS 14.2.1 installed. There is definitely something wrong here 'cos it should not lose this much only idling with screen off! I hope this is fixable with a software update, 'cos I'm thinking about returning the phone to Apple :/
 
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