Ios 15.1 battery drain

Same here, Xs Max and I get a fraction of the battery life I used to. I am also having significant issues with my hearing aides and the Oticon On app since the update. The hearing aides continue to shut down repeatedly, making life very difficult to simply function as I have an 80% loss in one ear and 60-65% in the other. Then I have to worry about my battery cutting out really fast now as well! Give us a patch!!!

Antu_13 - may I suggest that you send a Bug report to Apple Feedback (Google it, should bring up the correct page)?

Apple engineers don't read these user forums, but they do read Feedback reports. If enough people report the same issue, Apple will do something about it. Thanks.

exactly the same issue; since I updated my IOS to 15.1 I have to charge my phone constantly - three, four times a day and I haven't used it much at all. only for some texts and one short phone call. This is completely unacceptable.

SOLVED: IOS Battery Drain.

I have iPhone XR. After install of IOS 15.1, I had two problems. First, my battery only lasted about 14-16 hours instead of the previous expectation of 24 or more. Second, unless the battery was at least 80% charged, I was unable to access directions on any of the map apps when I was using LTE. Told I wasn't connected, even though I could get email.

I finally figured out that the GPS system power demand must be exceeding that available on the partially depleted battery. I read through this forum and tried several of the fixes suggested. This one WORKED.

I went Settings-General-Transfer or Reset iPhone-Reset-Reset Network Settings. Powered off. 30 seconds. Powered on. Charged to capacity over night. 9 hours later, the battery icon has barely budged and LTE navigation works on all apps.

I had to go through dozens of posts and tried several fixes. Posting this in hopes that someone else can get this to work for them.

12/5/21

My response is to "Suppose" who posted his/her response above on 12/1/21 regarding the massive battery drain iPhones have

after updating to IOS 15.1.  I have one word for you Suppose--GENIUS!  I hope the other readers on this forum will have the patience to work through the previous seven pages and reach your response here on page 8 because your response

WORKS!  From reading other people's responses on this matter, I understand Apple engineers don't read forums but do

read the Apple feedback webpage.  Well, they should read the forums also because Suppose has the solution to this

problem.

I also have an iPhone XR. Prior to my updating to IOS 15.1, I would get anywhere from 3 (heavy days usage) to 5-6 (lighter days usage) between battery charge.  I've had my phone for 1 year and 4 months.  At the one-year mark,  my battery health was 99% and currently still is, so my battery is in very good health and functioning optimally.  After upgrading to IOS 15.1, I was lucky if I squeaked out 2 days before needing to charge my battery.  I even tried not using my phone after fully charging it, and it still only gave me maybe 2 days before I needed to charge it again (??).  I went through all my settings to confirm they were still where I set them and that I hadn't accidentally turned on some function that was sapping battery charge or whether

the IOS update turned on a setting I previously had turned off and that is why my battery was going down very, very fast. 

As a side note, you should go through your settings after each IOS update because I have found Apple assumes you want some new function turned on by default and also turns back on something you have previously turned off.

Anyway, I was really frustrated with the significant drop in battery charge so quickly after updating to IOS 15.1 which was not my experience with other IOS updates prior to this 15.1 update.  I began searching the web to see if anyone else was experiencing significant battery drain after updating to IOS 15.1.  MANY people are experiencing this so we on

this forum are definitely not alone, and I join others on this forum hoping future IOS updates will formally correct this problem now and so it doesn't happen again in the future so we don't have to search for a "work around" because of Apple's error. 

My search brought me to this forum, and I read all 8 pages of users' troubleshooting and "work around" ideas.  Then I came to page 8 and Suppose's response.  I tried it and it WORKED! Let me explain. 

I reset my network settings (yes, this means you'll have to reenter your passwords for the WiFi networks you use).  While Suppose turned his/her phone off for 30 seconds, I turned mine off for ten minutes (nothing magical about ten minutes...I just wanted to do it).  I fully charged my phone.....and then I waited. Seventeen hours after I had charged my phone, I had 100% charge remaining; 24 hours after I had charged my phone, I had 96% charge remaining; and 36 hours after I had charged my phone I had 91% charge remaining.  So, I was one and one-half days past charging up my battery and I still had quite a bit of battery charge left--unlike as I described above barely getting maybe two days (just a half day longer than my test example) before my battery dropped to 20%--21%.  Suppose's recommendation resolved my severe battery drain and returned by battery discharge level to the level I had in the past.  I'll use this method if I experience a similar situation after future updates.  By the way, from some articles I've read on the web, IOS 15.2 might be coming out within the next couple of weeks (either

sometime during the week of 12/5/21 or sometime during the week of 12/12/21).  Here's hoping they have

addressed this issue in it.

Finally, I use my phone largely for phone calls, text messages, and voice memos.  I also use it as needed for photos, adding/deleting contacts, and retrieving voicemails.  I'm sure many on this forum use their phones far more extensively and for more purposes than I do.  However, I just wanted to add that the methods you read on the web from Apple and other reliable sources for ways to reduce battery drain (under normal use and not because of a rogue IOS update version) and extend battery health and life really do work....I've seen the positive results on my phone.  So if you don't always need to have background app refresh, fetch/push, location, some notifications, multiple apps going at the same time, display settings, and

other apps always on and/or always at the max settings, any function you can reduce the use of or turn off when not using will help your battery last longer between charges and extend the lifespan of your battery.  Of course, you all know what your needs are.  I just wanted to share what methods of reducing normal battery drain and extending battery life have worked for me in case they may be of use and help to you.

Thanks, again, Suppose for your help!

I’ve been advocating to “reset network settings” for a couple of weeks. That and turning off widgets on the Home Screen have been the most help. Before doing that even low power mode was not much help. I was amazed at how excessive the drain was and that it didn’t change for me with low power mode.

I also have a problem after installing 15.1 I see calendar app draining 40 % of battery last 24 hours and it does not drop ever after 2 reboots on 11 pro. Also the same applies to other users the office so there must be a os issue

Same problem. I’ve tried everything suggested online from hard resetting to reset all settings. Now I have other problems as well as some apps not showing up in the notifications settings so I can no longer get notifications for apps like Amazon or Outlook. It’s been a nightmare since I upgraded and it’s been longer than a month no new updates.

I saw other people doing that with no success. at the moment I use the notifications coming from teams which works for the moment. that was not an upgrade it was a time bomb. my cellular settings changed call waiting was deactivated. The phone somehow looks slower etc.

I own iPhone SE, my battery was massively depleted. Before the update - I could go 3 days without charging. Right after the update, I noticed a drastic drop from 79% at 10pm to 1% the next morning. I recharged the phone and the next night I was again at 81% when I actually turned off the phone and the next morning after a restart the battery level was at 40%.

Does anyone know why this update is so corrosive to battery life?

I like my phone (it fits perfectly in my side pocket and does what I need it to do), but if the rumors are true, that apple does create these updates to tax the battery and force the sales of new phones - then I think I will be looking at Android for my next phone.

My battery health after updating the IOS 15 went from 99% to 93% in less than two months. It drops 1% each week, and I’m actually considered if you’ll get to fix THIS BIG ISSUE, cause my iPhone is actually dying.

So, after doing a RESET NETWORK SETTINGS it would help battery life for a couple of days, and then the drain would come back. This last time that I did it for my iPad Mini 6 was last night. I still have background app refresh off, and push mail turned off while I troubleshoot. (I'll get to my iPhone 13 Pro Max at the end).

This time, after resetting network settings and signing back into my wifi, I did NOT connect it to my computer and "trust" the computer nor let it be found on wifi as I've always done before. I only ever connect to back up, sync, or use sidecar maybe once a week; and I realized that my battery drain doesn't come back for a couple of days until AFTER I connect to my iMac to do a backup or sync, and then it all goes downhill again.

So, I left the iPad unpaired from my iMac, and elected to leave it as a standalone device. I thought maybe that network wifi connection to the iMac was draining the battery when NO apps are running.

IT DEFINITELY HELPED. I left iPad Mini 6 unplugged at 2:45AM today when I went to bed with 100% charge, and woke up this AM 8 hours later at 10:45AM to find that the iPad was still at 100% charge! Normally it would have dropped from 100% to between 60-70% during that 8 hours of unplugged standby time.

By 3PM, 12 hours after coming off the charger it was still at 98% when not using it (dropped to 97% while checking battery use). The battery-level line was pretty flat, and not dropping at a steep rate that you would have expected with heavy use. I used it for about 1.5 hours total over the day, and the battery was down to 82%, with a flat battery-level line when not using it for an hour or two. I just left the screen on for another 15 minutes while typing this, and it dropped to 80%.

But I'm 20 hours out from my last charge, and previously after the iPad OS 15.1 update I would absolutely have a dead battery by this 20 hour mark with it in STANDBY and 0 minutes of use. Here I am now with 1hr 10 minutes screen on, and 28 minutes screen off use, and still at 80% !!!

Prior to reset network settings it would lose between 4-6% per hour, and with over 1.5 hours of use I am averaging 1% per hour drain, but much less than that when not using it. I am not going to plug the iPad into power tonight, to see what my charge level is at tomorrow morning.

As for my iPhone 13 Pro Max, I had last reset network settings about 3-4 days ago and it helped but gradually worsened again, although it did well while reading a book with black background and white text last night. I unplugged iPhone from the charger at 10:11 AM today, but by 3PM it was at 80% charge with only 52 minutes of "screen on" use during those 5 hours. I put it in low power mode at that point and used it for about 1hr 43m "screen on" between 3PM - 7PM where it had dropped from 80% to 60%.

I then reset network settings at 7PM, and 4 hours later (with 30 minutes of "screen on" use) the battery was still at 52% in low power mode. The rate of battery level drop on the iPhone battery graph was fairly steep before vs after "reset network settings" when it went much flatter. The rate of drain prior to the network settings reset was a flat line that would have intersected with a 25% battery level right now, instead of 51% where it sits now.

One thing that I have noticed with my iPhone 13 Pro Max is that when it hits 50% battery it drains slower, and I was able to read a book for 4 hours last night and it only drained from 50% to 25% during that time. So, at 51% now and I expect it will drain even slower tonight than last night.

EDIT - (1) not sure if I should let iPhone 13 Pro Max drain to 0% and shut off on its own to calibrate it, because I've been charging when it hits 20% to avoid harming the battery.

(2) I've noticed that I have optimize battery charging turned on, but I don't think it's working and I have regular bedtime hours. With iPhone on my wireless charger, it just charges slowly to 100% over 4 hours, and then stays at 100% charge for the next 4 hours before I wake up at the same time every day.

Hi Phidge - please let Apple know at their Feedback page (you can google Apple Feedback, it will take you to the correct page, file reports under the iPhone logo).

Apple engineers don’t read the user forums, so other than getting hold of tech support over the phone, this is the only way to bring the problem to their attention.

I want to be clear from my last post earlier tonight that at no time did I have to put the iPad mini 6 into low power mode yesterday with the above battery life testing. And I did my standby battery drain test for the first 12 hours off the charger without picking it up to use other than look at the battery level. I did not start to use apps on the iPad until after the 12 hours in standby, whereupon it had dropped to 97-98% (3PM).

Also, I did not have the iPhone in low power mode until it dropped to 80% by 3 PM (over a 5 hour period). iPhone has been in low power mode since 3PM - it's 1:44 AM and I'm about to go to bed with it at 48% charge, which is a 4% drop in 3 hours with only 20 minutes of "screen on". Since 7PM the "screen off" use is 0 minutes.

I have not had any apps open in the background on the iPad, because everything was force quit before I went to bed and took it off the charger. However I have 27 apps open in the background on the iPhone, including settings, Kindle, notes, speed test, ring doorbell, messages, camera, fuzzy's taco shop, phone, mail, Safari, Reddit, fitness, App Store, Amazon, Snapchat, photos, Apple Watch, wallet, audible, clock, bank, contacts, Twitter, messenger, calendar, Visa.

As a followup - iPad mini 6 battery was at 75% at 1:45AM and while left alone in standby it was down to 70% at 11AM, so 5% drain in 9 hours in standby, NO low power mode or anything.

Before I reset network settings it would have dropped by 40-50% overnight during that 9 hours.