Unusually high battery drain is a symptom, not a problem. There are many possible causes for this symptom. In theory, as many as there are apps installed on the phone.
Sudden change in battery drain is caused by an app or apps that are using more energy than they should. It can happen at any time, but is slightly more likely after an update, because the update process interrupts apps in the middle of some activity, either foreground or background, and some apps do not recover cleanly and get stuck attempting to repeat a failed data update, essentially forever. Killing the app doesn't always resolve it, because the real problem is data that was corrupted by the interruption, and the app will continue trying to recover the corrupted data after it restarts.
MS Exchange email accounts will do this frequently, due to a bug in the Microsoft ActiveSync process which, unfortunately can never be fixed, because it would break millions (billions) of older MS Exchange clients that cannot be updated. If you have an MS Exchange account the only fix is to delete the account, restart the phone, and add it back. Or have your administrator restart the MS Exchange server (which most admins don't really want to do). If you are interested I can provide technical details on this bug, but I don't want to distract from solving the problem.
Other IMAP email accounts can exhibit a similar problem; again, the easiest solution is to delete the account, then add it back. As the email server is always the master for IMAP accounts no messages will be lost.
Accounts that sync data from a server (and this includes iCloud) can get out of sync between the server and the iPhone. Given enough time this can resolve itself (at least for iCloud), but it's easier to shut down the sync service, restart the phone, and start it up again. Yes, even for iCloud syncing. And I had to do this over the weekend when my iCloud Contacts stopped syncing correctly. It took about 14 hours for my contacts to again sync.
As many 3rd party apps sync with a server all can be suspect. That's why checking to see which apps are using the most energy in Settings/Battery is a good diagnostic step.
I had great battery life but have not updated my ipad air to ios 11. By accident the other day hit the update tab and there was no way to stop it. 😬 Now I have lost 14 apps, 3 I loved and the reason for not updating. With 11.2.5 my battery drains while not doing anything. I understand things are happing in the backround so went through and turned everything off.... Just did that so not sure yet on the drain or performance, however think its very unfair to not be able to use my device as I wish with the settings apple offers.
Please hear these complaints and fix it In your next patch ~ Thanks!
Your response to the issue is lame! I have not changed a thing except to update to iOS 11.0.5 from iOS 10+ Apple needs to own up to this disaster of battery drain—i used to charge my iPhone 6s+ once in a day and half—now my battery is down to 67% I’m a matter of 3.5 hours—don’t tell iPhone users to go hunting for a solution like we have nothing else better to do with our time—-own up by allowing us to revert back to iOS 10 !!!
Kidding? Not in the slightest. I have iOS 11.2.5 on 2 devices, and my battery life is excellent on both. I charge my phone overnight, and by the end of the next day my state of charge is up around 70%, unless I used the phone heavily during the day; it might dip to 60% then. Every time there has been an update in the past 10 years a few people are absolutely, positively convinced that the update killed their battery life. It did only once; 3.1.2. If you can't accept the fact that the version did not cause your battery problem you will never resolve it.
Has anyone tried a full iPhone factory reset after the 11.2.5 upgrade blatantly effected battery retention? I believe someone in this thread tried it to no avail, but was wondering if this worked for anyone.
dinofromstockwell wrote:
what a genius
Actually, I am. But that's besides the point. The FACT is that whatever problem you have with battery life it is not a problem with iOS 11.2.5. If it were there would be millions (I am not exaggerating) of posts about it. There are a few posts after every update claiming that the problem is the specific version. It never is. (Well, it was once, 5 years ago, and there were 13,000 posts about it in the 2 weeks before Apple fixed it). But if you live with the assumption that it is, as I said, the problem will never be resolved. Yes, it occured after you updated. But look up the "post hoc, ergo propter hoc" fallacy.
Lawrence Finch wrote:
Well, my new year's resolution was to never respond in any threads about battery life, as it is unrewarding. Now I know why I made it. I'll try to be better the rest of the year.
Mine was to stop hitting the snooze button in the morning. I'm doing okay with it. But, I'm not sure it's especially rewarding.
Can you explain to us what’s the Issue causing the battery drain? Seems that you know, but we are stupid and can’t figure out. Maybe you are a genius!? You should deliver a resume to Apple! They’ll probabbly hire you!!!
Lawrence,
THIS was a helpful answer. At least it gives us a general idea a step to the scenarios that would cause the symptom of battery drainage. Since going app by app seems cumbersome, even if it’s narrowed to the scope of email exchanges, in your opinion is it safe to assume that a full factory reset of the iPhone in question will prove that the issue is either
- App related (if the problem goes away)
Or
- Battery related (if the problem persists)
But in either case NOT OS related?
There are a lot of people around the world with this problem but not all connect to Apple USA to report battery drain issues after the update—I know of people in USA and in India who are having this problem right after the update but don’t bother to report it because not everyone has the time for it
NewYorkCityBoy wrote:
There are a lot of people around the world with this problem but not all connect to Apple USA to report battery drain issues after the update—
A lot of people around the world connect to this forum. This is a worldwide forum, not just Apple USA. Today alone I have responded to people from China, India, Italy and Ukraine. In the past week at least a dozen countries. A level 6 I work with frequently is in Modena, Italy. One of my close associates responds to Russians in Russian occasionally.
MoustachePink wrote:
Yes, absolutely agree. And in my situation (the battery is new) seems that I have no choices. That’s the last apple device for me.
I think that's really funny. My co-worker switched to a Samsung, then dumped it because he had to charge it 4 times a day. Good luck with another product; maybe it will work better, but there's no guarantee. But if you want to spend $1,000 rather than troubleshoot the problem (which costs nothing) be my guest.
Ezz wrote:
Nonsense. I'll stop feeding this troll as this is not constructive at all.
Just because someone does not agree with your or points out where you are wrong, doesn't make them a troll. Civil adults can disagree without resorting to name calling.
Hei guys, i have tha same issue,i have iPhone 7, 32G, after i updated to 11.2.5 my battery over night its horrible, i go to sleep with 100% and after 10hourl i remain with 22%. I update to 11.2.6 and problem still persist. If i Go to Settings > Battery. i dont have background apps. I tried with "low power mode on" and no difference. Apple please sole this problem.
Hi Lawerance,
Thank you so much for thread that explains the possible reasons for battery drain. I have an ipad air and iphone 7 plus. After updating to 11.2.5 noticed the ipad was draing 2 to 3% every 2 to 3 minutes. Your explanation made total sense so today cleared out the mail, unwanted apps, did the newest update ..since I had nothing to lose, then did the hard reset. After 100% charge, 2 hours later battery life 80% that is on track with the 10 hour battery life of an ipad air. Now working on my phone. Very happy that there are people like you that will take your time to advise in an eloquent manner.
Annie
I starting having this problem when I updated from 11.2 to 11.2.5, previously my phone would last all day without any issue. Surely, after an update, the phone should work as before and you shouldn't have to start turning off this and that to get it to function as before (this somewhat defeats the object of having these fancy settings on the phones). I notice you say turning off iCloud drive may help, but what exactly does iCloud drive do (is it just a back up for documents) and by turning it off, will it still sync contact etc? I also notice that below the iCloud drive toggle, it has backups turned on for other apps. By turning off iCloud drive, do these other apps still backup? (these may sound like stupid questions to you, but I am a technophobe and have only learnt stuff on a need to know basis). Thanks
IOS 11.2.5 battery drain
