Battery Drains in iOS 8.0.2 iPhone 5s

my problem was very similar to most people in this forum, i had a 5s, and got it replaced, same problem. i then got a 6, same problem. I did a fresh install but basically did not install any apps for a couple of days, to see how battery went. So far i am getting really good battery usage. only using about 30-40% per day. (still making phone calls, using safari etc.) I have slowly started re-installing some of my apps. My assumption is that one or more of my apps was draining the battery. Even though they were all closed and battery usage was blaming safari, i think some apps use safari somehow.

my battery usage was the same as standby, so something wasn't closing.

hope this helps someone.

so far so good, i will let you guys know if i figure out which app was causing the problem

me too in the same boat.

Did all the magic tricks which apple and some forums explained to save the battery, but of no use.

Battery drains at the rate of 10% every 30 mins in standby mode. A fully chared phone switches off overnight drainign the entire battery.

Why don't apple just give the option to rollback to ios7.

I think the EU government should form a new law called "Apple Law" and impose a huge fine. Until then Apple will not react to any of the customer problems.

hi!

i have been facing the same issue, terribly fast drainage of iphone 5s battery.

Did everything i could to make phone usable, even replaced battery to a new one and still nothing seems to work.

Now even my old iphone 4 looks a better solution in terms of reliability then barely used iphone 5s.

Did someone found out what is the problem? Maybe some other solution?

thanks in advance,

A.

I had the same issue with my 5S. One thing I noticed was I have several email accounts and each has a calendar, contacts, and reminders. I think the phone had problems synching so many calendars, and I only really want to use my iCloud calendar and my Work calendar. By turning off the calendars I don't intend to use, my phone no longer runs down the battery by constantly syncing multiple calendars. Go to Settings -> Mail, Contacts, Calendars -> select each email account and toggle off synching of any contacts, calendar, and reminders you don't need. Then, your phone won't waste power trying to sync more data than necessary.

Also, I think any entry I added to one calendar or contact list was being copied to all of the synched accounts, and that caused an endless loop of synching. Setting email to fetch every half hour or less frequently may also help. Good luck!

Today was the first time that my battery lasted properly. I've had this issue since ios8, I had a 5S and the problem followed me to a replacement 5s and then my 6... I have tried everything. I played with a few settings last night and today at 7pm i still have 56% left... It feels like a miracle! I'm not exactly sure what the solve is, I'll report if I find out, but I think it was turning off fetch new data in mail. At this point I don't care about getting mail because my battery lasts a whole day!!!

I have a 32GB iPhone 5s that was working fine until IOS8. Now my battery drains really fast like everyone else posting here. I did find in my searches the "Battery Usage" feature of the new os and mine is overwhelmingly reporting MAIL as the culprit of my battery drain. Like everyone else I've done a reset and fresh install without restoring from backup and the drain remains.

I suspect that something is messed up with my iCloud account and it's continuously trying to sync something with iCloud. I've had an apple account since it was mac.com and I wonder if something is messed up with the account. Since my phone is already wiped I'm going to do another clean install and not setup my iCloud account and see what happens.

Have you tried to turn off (fetch new data) Settings/Mail, Contacts, Calanders/Fetch New Data

The mail app will still work, you will just have to manually open it. And then it will get mail....

But its been nice having my battery back

All of my mail settings are set to manual and doesn't fetch any data. I open my mail app MAYBE once a week. The music app seems to be doing it for me. I use the iPod aspect pretty much all day at work, which normally I'd be down to about 70% by the end of the day. Now I'm dropping about 1% a minute. I have to keep my phone plugged in all day, which I know hurts the actual battery in the longrun, but there's no other option.

Yep, like others I tried turning off all the bells and whistles that make an iPhone an iPhone including setting all my mail accounts to fetch, I tried 30 minutes and 1 hour, I also did a fresh restore as new phone. My battery still drained like crazy. Mail was still listed as ~90% battery usage with Home and Lock screen next highest at 7%.

My experiment of not enabling my iCloud account isn't quite finished yet but I have interesting results so far.

With my freshly charged/re-restored as new iPhone5s and NO other apps installed I loaded in my work Exchange email account. Let it sit for an hour, checked the phone and it was still at 100%, encouraging! Loaded my gmail account and let it sit for an hour, checked it and it was still at 100%, phone was back to iOS 7 battery usage. Added in a 3rd personal IMAP email account and it did drop to 98% after the 3rd hour of sitting. At this point I had not loaded in my iCloud account. I let it sit all night and in the morning it was at 92%, woohoo! Took it to work, checked email, even loaded one little game app that I play all the time (bad I know but I am addicted 🙂 After a day of usage of checking email, surfing, and playing this one game and getting ready to go to bed it was down to 61%. This is definitely back to normal. Mind you this is with my Exchange account set to Push and all the default services enabled.

The next step, I just loaded my iCloud account back into my phone, plugged it in to charge for the night and will use it tomorrow to see the rate at which the battery drains.

I'll report back tomorrow night! If it is indeed iCloud I'm not really sure what to do unless anyone knows the features of iCloud that changed from iOS7 to iOS8. Seemed like there was a big change but I don't recall what it was...

Well I added in my iCloud account last night, took my phone to work, used it as normal and the battery lasted all day and still had 50% when I got home and even now tonight still is at 46%. So I guess it's not my iCloud account... so much for that theory 😟

Hi Paul, did you turn off Fetch New Data which is under your email accounts setting.

I had all my accounts set to fetch manually to, but it wasn't until i turned Fetch New Data off that fixed the issue for me.

Well, I didn't make any changes to my phone and today it drained like crazy. So now I'm back to wondering if my iCloud account was at fault.

I'll try turning off fetch new data as you suggest but I'm pretty sure I had that off before, although at this point I'm beginning to forget everything I've tried 🙂

Thanks Anggie for that article, going to look closer at how he tracks down problems.

Paul

Paul, did you try turning off any of your calendars? My 32GB iPhone 5S had the same battery drain and heat issues after I installed iOS 8.0. I tried all the steps people suggested but nothing worked until I eventually turned off the calendars, reminders and contact lists I don't use, and now my iPhone holds its charge like it should. I am running iOS 8.1.1 now, and it works fine. Everyone with this issue should go to Settings -> Mail, Contacts, and Calendars. Then, select each email account and toggle off synching of any contacts, calendar, and reminders you don't need.

Well turning off fetch new data didn't work. I was at 60% and sat down to watch a movie and was at 46% 1.5 hours later without even touching the phone. So on a whim I signed out of my iCloud account which removed it from my phone and my percentage jumped immediately to 48% and stayed there until I went to bed an hour later.

My gmail, and imap accounts are set to sync mail only but my Exchange account for work is set to mail and calendars. My iCloud account I had turned off reminders, notes, documents but left calendars, contacts, mail, photo stream on. I'll re-enable my iCloud account and try turning off calendars to see what happens.

Thanks everyone for the suggestions. I guess I have it narrowed down to iCloud now I just need to figure out what part of iCloud it is. Over the years my iCloud calendar somehow keeps getting duplicate entries no matter how often I clean them out. Maybe that's the issue. I wonder if there's a way to completely erase and reset iCloud calendar?