iPhone 5S getting incredibly hot and high battery usage after iOS 8 update

I've charged my phone overnight, on the way in to work 79% disappears!!! Plus it gets superhot and the apps are even more glitchy than they were before.

I've turned off nearly everything new that I can, and still 79% gone in around 1hr...

Come on Apple.

I must say, I faced all what you are experiencing except that I set ISO 8 up by clean installation not via OTA or iTunes.

in 17 Sep. I was waiting for IOS 8 like most of you, but because I'm familiar with updates issues, I decided to dig for IOS 8 ipsw.

within within hours I got it, the public one.

after the update I experienced sever battery drain combined with too much heat from the device to extent I turned it off for safety concerns.

once I'm home, tried to rest network connections, hard rest, rest all with no luck. I gave it a shot to downgrade & that went well.

the first thing I notices after updating to 8, is poor carrier signal, 1 or 2 all the time, plus battery usage indicates 70% of power consumption for email!!

that was strange as in Thursday, turned off wifi, 3G and didnt take calls or answering whatsapp & sms's for most of time because I was doing a 3 hrs exam.

and finally, I'm in Jordan/middle ease & I have iPhone 5S - GSM North America, and successfully downgrade to 7.1.2.

Yeah, my battery is complete **** now under iOS 8. Before, my 5S could be on standby for a super long time (if I unplugged it at 100% before sleeping, I'd wake up with it at 100% or 99% the least).

Now, when I woke up this morning, it is at 97%. I had to charge it TWICE yesterday, I did my upgrade OTA almost the second iOS 8 was released. I was planning to do an iTunes upgrade, but I was at school, and I was lazy and had to make it to my next class. Ever since the release date, my phone's battery has been draining much faster. Before on iOS 7.1.2, my BEST battery time was 10 hours of usage, with 1 day and 20 minutes (or more) of standby time. That was when my battery went down under 10% (i charged at 9%). Now? It is horrifying! Here is my today's usage:

12-1AM (last night) - Unplugged at that time, and left it there as I slept - 100%
11AM- Woke up at 11am (I swiped away my alarm 2 seconds in to it activating at 8am and went back to sleep) - 97%
3:37PM - all I did between 11 and 3 was reply to several (literally, SEVERAL, no more than probably max 20) texts, and they were not back-to-back, so my screen was off for the most part - 74%

So I really have no idea what is draining the battery I've done my resets, and my app cleansing by deleting some apps, and also taking them out of memory even though I shouldn't and never do that lol. Also, I feel the battery display thing, is not a good accurate way of doing it. I feel Apple should do the Android way, where they show you, from when you unplugged, what is draining your battery. With the current method, I feel there is a high chance that no one can really pinpoint accurately what is exactly draining your battery at that moment, or since last charge, because the current method shows you in the past 24 hours, (which I doubt anyone's phone will last that long on iOS 8), or past 2 days...

Don't forget to check which apps may be doing background content updates.

The Facebook app in particular seems to be a major power hog.

Hey Lee, my iPhone 5S is working fine, no overheating and almost the same battery usage as on iOS 7.

- Backup your iPhone over iTunes.

- Do a Restore.

- Start from fresh of restore your backup.

- On your iPhone go to Privacy » Location Services On, then set most of the apps to “While using” or Never for unused ones.

- Most important: scroll down to “System Services” (same screen as Privacy » Location Services On) and turn off all unnecessary services. With the Status Bar Icon on, you will see less often the location arrow.

In my case the Cell Network Search was draining most of my battery.

Form more info of which System Services you don't need click on the link “About Location Services and Privacy...” (below Location Services switch button).

Hope this helps.

Guys,

Apple is still signing 7.1.2; I have just did it again.

upgraded to 8 just to get some pictures I took & badly need, then just finished downgrading to 7.1.2 successfully.

First post here, to say exactly the same thing. Not only is my device not holding charge, it is getting hot and takes forever to charge. I have done everything suggested here and I even spend a large amount of time with my phone in airplane mode. I just cannot get 100% charge and my phone battery does not last. It was bought mid-December and these issues occurred immediately after installing ios8.

After that comment, Lee, I actually erased my phone, did a full restore, set-up as a new phone, and then I restored my back up that I made before the act. So far, my battery does not seem to have improved TOO much. I think there IS an improvement, I had 5 hours of usage this time, but I had to be extremely careful not to 'over text'. Pretty much what I did was use it as little as possible, and having a phone shouldn't mean I don't get to use it, thus rendering this new result somewhat useless albeit it being somewhat of a small tiny improvement.

I will be waiting for iOS 8.0.1 as well, and I won't be doing a complete clean restore, and re-setting everything up since I feel that is too much work for someone as busy as I am who has lots of readings and assignments to do in University >_<...

I will continue to watch and maybe even comment on here if there is anything worth updating.

Today, after the 5 hrs I just explained above, I let my phone die. I want to see if it has anything to do with the calibration of my battery metre. So I will tell you after this full charge (dead-100%), if the battery improves, indifferent, or gets worse. 🙂 Also, my Home Screen & Lock Screen or whatever is using the most battery, one time I checked it was at 47%... which is HIGHHHH. Facebook seems to be one of the culprits too, but back in iOS 7.1.2, I disabled Background Refresh and Location Ser. for FB, and it didn't use much battery. Now, apparently there are background usage that is draining my phone coming from FB (and i used Twitter more than FB, but some how FB is JUST under Twitter for usage %) and I didn't even open it, nor did I allow it to be refreshing in the background or use location services... But again, we phone users shouldn't be stripping and limiting ourselves to certain apps, that wouldn't make a smartphone smart, and thus, this is a problem definitely, in my opinion, with the OS itself. I really hope 8.0.1 will patch up whatever it is that is causing the drains.

EDIT: I unplugged it right now at 8:39PM EST. It is at 100%. I was charging it via my computer. On iTunes, I always look at the percentage and icon. There is a plug when it means it is done charging, despite the number being at 100%, and I unplugged it the second it became a plug, or at least within several seconds of it being one, since it wasn't when i looked, and when I looked away and back, it was a plug. Let's see how this goes!!

Small Update: From when I unplugged (8:39PM @ 100%) until now (9:51PM EST @ 100%), I have encountered a problem: My phone's messaging notification tone is low to non-existent when my phone is locked. When unlocked, however, it is loud and clear. Now, before anyone jumps to conclusions, my phone's ringtone volume is up to the highest, and when I choose another tone, it will give me a preview, that preview's volume is at the max, even when previewing the one I am currently using, so I have no idea where this problem sprung from >_<... this is really annoying.... I tried switching the silence buttons, bringing the volume down then up, and I tried changing tones (to which the other tone was super low or completely silent as well), I checked if I had sound on for my message app notifications, etc. Is anyone else having this problem too? This is a new problem that arose and is unrelated to the original problems this post is about, though the original problems still exist on my phone.

I've done the complete re-install. Also tried resetting all-settings only. Nothing significantly different.

Conclusion? Some serious bugs in iOS 8;

Solution/Acceptance? Will make sure chargers etc are nearby and just wait for iOS 8.01 and hope that fixes the problems.

Good thing I didn't upgrade my wife's iPhone 5s yet!

I am trying to re-calibrate my battery metre by draining it, I will update everyone on here 😝

Also, the thing with the low/no notification sound, I (for now) fixed it by turning my phone on and off (not a soft reset, but I held the lock button, then swiped to power off then I powered back on)

I am not sure the difference between soft reset and power-on-off, but to me, the difference I know is that a soft reset will render the battery display (the one that displays usage/standby time) to N/A or "---" while a power-on-off (what I did), will not disrupt the count. That's the only difference I've noticed.

Anyway, as far as my notification problem goes, that is my fix. Whether it lasts is unknown!