ios 9 update battery drain problem

First, don't respond with general battery life advice! After upgrade to ios 9 then 9.01, the battery life on my iphone 5s has been reduced dramatically.


This is not a settings issue as I verified all my previous settings are the same as before the update. All location services and background app refreshes are off and were off prior to the update.


There is clearly a problem with the ios using more resources. All the responses I have seen regarding this issue give the same general advice for conserving battery life. This is not a "settings" issue - update resulted in maybe 50-60% of the previous battery life.


Any fixes in the works?

iPhone 5s, iOS 9.0.1

Posted on Oct 1, 2015 7:55 AM

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112 replies

Oct 14, 2015 3:27 PM in response to Cessna18

hello..i had this issue on my iphn 5s..myself feeling irritated all tym bcz of this..searching for soutions everywhere..no succes..

my mobile heats up battery drains so dramaticlly..i thought it was ios bugs..i did restores fresh instalations restrictions and all powersaving tips.again no sucess..

but oi found out real fix for this...its not a setting issues..not software bugs...its related to hardware..pretty confused i m.but its the fact..so this solution is for onyly those who suffers heats and battery drain issues on iphone ..it is quite simple.but little tecnical mind needs. for deassambling the i device..

so here we go....

i noticed the heat cames from the earpiece sides then spereading to all over the. device..then i carefully opned my idevice..then i touched on the display conector area of my iphone device its seems to be real hot..so i decide to switch of my devicd and just umpluged the camera and earipiece flex cable from main board....bingoooo......thts causes i devices heats ..the faluty flex cable...i replaced that ..it solves the issues....

so just repace the front camera fex cable ..no bugs no settings....just replace..

bingo......

00966592941595..for more soutions wapp me...all the best guys...

Oct 14, 2015 3:51 PM in response to Cessna18

I know there are a lot of responses, but I'll respond to the first post so everyone sees it.


The problem has nothing to do directly with iOS 9, 9.0.1, or 9.0.2. What caused it is the process of updating, and it has happened to a few phones (yes, really a few) after every update that has ever been released. It can also happen spontaneously, but it is more noticeable after an update because it is natural to see the correlation as causation.


What causes it is an app (or apps, but usually only one) that was interrupted in the middle of doing something requiring sending or receiving data. If the app isn't properly coded to deal with this it keeps attempting to complete the send/receive, but fails every time. But it uses up processing time, battery, and sometimes data as it tries. To fix it the app must be identified and either killed, or, in some cases, deleted and reinstalled. Go to Settings/Battery, scroll to the bottom, and look at Usage and Standby. If they are exactly the same it is a real runaway app. If they are not the same, but Usage is much higher than your memory of how much you have used the phone it is an app running in background.


Next, read the list of apps and the amount of energy each has used. This should tell you which app you have to deal with.


There is one special case. If the app is Mail and you have a Microsoft Exchange account on the phone it is the Exchange account that is causing the problem. This is a bug in Microsoft's ActiveSync protocol. To fix it either delete the Exchange account, reboot the phone, and add it back, or turn off all of the switches for it in Settings/Mail, Contacts, Calendars. Reboot, then turn them back on.


These are the first, easy steps to resolve sudden battery drain. There are more, but try these first.

Oct 14, 2015 6:19 PM in response to Lady.Bug

Make sure all you apps that have released updates have been updated since the 9.0.2 release. I had about 2 days of 9.0.2 where the battery was draining and the phone was hot. Then once after powering down fully, the phone went back to normal. I noticed that several apps auto updated in the intervening time. I believe there were apps that weren't playing well with iOS9 at first. For more than a week everything has been "back to normal" for me.

Oct 15, 2015 12:53 PM in response to Lawrence Finch

I knew better from my years of iPhone experience but my IP6 with OS9.0 was not responding when alerts ring. Embarrassed me in meetings more then once. Updated to OS9.0.2 last night, gave it a full change. Used it 3 or 4 times, 1 call, 3 text. I leave text running in the back but turn off everything else when not using. Battery is at 15% in 7 hours. By analogy the heaviest consumer of the battery needs attention but in my case the Home & Lock Screen has used 81% with only 18 on screen. Not sure what to do about that

Oct 23, 2015 10:14 AM in response to Lawrence Finch

I hear you, but in this case: No.


My apps are under control: I've turned off notifications, turned off background app refresh, and checked every setting to make sure that they're not misbehaving.


On iOS 8, no problems--battery would often last at least a days with sporadic use. After upgrading to iOS9--nothing else changed--I can almost watch the battery percentage drain. If I leave my phone on overnight, it is totally drained when I wake up.

Oct 23, 2015 10:52 AM in response to kmiklas

Sorry, if it was an iOS 9 problem you would see thousands of posts about it. You don't. There actually was a battery problem in an update 3 years ago, and there were over 20,000 posts about it in the 2 weeks before it was fixed. And that one affected only 5% of users at a time when there was only 1/5 the number of iOS devices. I have 4 devices on iOS 9, and none of them have battery issues. All of them have better battery life than they did on iOS 8. It is a problem with your phone or your apps, and if you wait for a global fix from Apple it will be a vey long wait.

Oct 24, 2015 10:00 AM in response to Lawrence Finch

Correct me if I'm wrong, but didn't Apple introduce "Low power mode" in iOS9?

http://www.macrumors.com/how-to/ios-9-low-power-mode/


My guess is that they messed around with how power is used on these devices. When in in normal (not low power mode), the OS uses lots of power to do God knows what.


I notice how my device sometimes gets hot for no apparent reason. Something in there is burning up my battery, doing something that I probably don't care about.

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ios 9 update battery drain problem

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