Q: iPhone 5 battery life is way worse than iPhone 4

I am in an area with AT&T 4G but practically no LTE, so I diabled LTE on the phone yesterday after reading some of the posts here, and, interestingly enough, now I am seeing the battery lasting twice as long as before, with the same usage pattern.  All other settings remain the same, with syncs to all iCloud services enabled.

How do I leave this F'in post ha ha. My iphone 5 is wicked now. All singing all dancing. Im getting 24 hours out of it after a DFU Reset and cycling the battery a couple of times. Good luck to the rest fo you because I know how crap it can be when something youve invested time and money in doesnt work how its supposed too. Shame on you Apple.

first of all LTE is from your phone service provider, providing it is in your area, not apples fault

and second maybe you have too much stuff running in the background, like notifications etc, if you re young that's probably it

The fix has already been stated several times if you just take the time to go back a few threads.. It's  NOT LTE 3g else its how the phone was restored from your 4.

I followed the very simple directions posted here earlier and my 5 is completely fixed.  Also note that it has already been confirmed that a patch is coming soon.

Last Friday my iPhone was down to 31% in 3 hours from a full charge. After following directions posted here earlier, after 3 hours I'm still at 96% LTE ON, BT ON, 20 text messages and 10 emails sent.

I'm sure some of you have defective batteries but for those who restored their 5 from their 4 using iTunes, the fix works.

>>>>>>>> DFU Reset and cycling the battery...

Now I love this phone maps notwithstanding :)

I was having problems too and seem to have fixed the problem.

I had 27% last week by lunch time. Today I have 52% at lunch time.

Not great, but much better.

I noticed last week that if I lost my 4g connection my phone would list no service. Only a phone reboot would allow it to reconnect to the AT&T network.

It happened at least three times. One of those times my wife was with me and her iphone 5 had several bars.

Turns out I had a bad sim card.

Not sure if that card was causing my phone to eat up juice. But it out perfomed my 4s in a side by side comparison yesterday. 

So .. another thought for everyone having problems.

This is my first iPhone 5, so i did not do a restore.

LTE on or off.. no difference for me. same battery usage.

Bluetooth was on here. there is definitely something wrong with the bluetooth code as it drains battery way to fast.

iCloud sync off

i've discharged the battery a few times now completely..

and I still see terrible battery usage.

I'm seeing about the same battery life as you. I also set up as new and didn't restore. So contrary to what some on here are saying, there's no "fix" yet for everyone.

I also set my phone up as new but had horrible battery life. After reading this thread, I decided to do a DFU Restore. I then ran the battery all the way dead, then recharged. My last full charge was yesterday (Sunday) around 11 AM. It is now 4:20 PM Monday and I still have 29%. The restore made a HUGE difference and I can say it's now comparable with my iphone 4.

I personally don't think the problem is coming from the backup because I never did one. The problem is in the IPSW that was applied at the factory.

Just my 2 cents.

Dave

Dave,

What is a DFU restore? Is it different from the iTunes restore?

And if so how do you perform one?

Thanks

Ok guys I've rebooted my iphone 5 so I'm not syncing with my previous Iphone4 back up. Fresh start only thing I did sync was my contacts. Originally before the the setup I could literally Watch my iPhone % gage move I was loosing battery that fast I had to charge the phone twice in the first day and then at night. Since the fresh sync as a new phone the battery life has been extremely good. :) I'd say its improved about 80% in battery life. I'm right now at 65% since 5am with moderate use. I wouldn't say it's better than my iPhone 4 when I first purchased it but hopefully with the new software update it will solve all our issues.  What Is the dfu restore?? 

Dan, when you do a DFU restore, you are downloading and installing a fresh version of the IOS from Apple via iTunes. It effectively wipes it clean and starts over from scratch. .

This will walk you through the restore. Keep in mind it's going to wipe everything off the phone. Make sure you have your contacts backed up to iCloud.

http://iphonefreakz.com/beginners-guide/howto-dfu-mode/

Dave

This post is very interesting to me, because if some are having these problems who did not restore from the previous Iphone 4 backup, but the DFU restore (with fresh install of ios6 downloaded from the apple servers) fixed it for them anyway, then maybe the ios6 loaded at the factory is the culprit after all.  If this is true, after a DFU reinstall, could a restore from the old iphone 4 backup or the backup I did on the ipohne 5 before DFUing it then restore everything as it was, without having to manually reinstall everything and have the bug still be fixed at the same time?  I have done a DFU wipe/reinstall as of now but have not done anything else aside from syncing my old contacts and apps from Itunes (and shutting of icloud syncing of all kinds after reading these posts).  I was wondering if anyone did that DFU wipe restore effort AND THEN RESTORED FROM THE OLD ITUNES BACKUP AFTER THAT -- did the fix remain?  If that is the case then I will try that next rather than spending a whole day getting my phone back to the way it was.  Just asking out there if anyone has succeeded doing that, because if so I will try it, I guess the worst that could happen is to have to DFU restore it again if it does not.  Any experience or thoughts on this would help.  

Thanks

Yesterday I did the restore from iTunes. I thought this was installing a new IOS6 from the apple server. Is this not the same thing as the DFU?

Hello,

DFU is only useful for downgrading to a previous firmware because it doesn't launch iBoot (iphone bootloader) and check if you are installing the most recent firmware.. So DFU is not the solution. It acts exactly the same than the classic restore.

When you put your phone in to DFU mode and plug it in to iTunes, it will ask you if you want to download and install IOS 6. It takes about 20 minutes to download. When I did it, the first attempt failed because it got corrupted somehow. So, it downloaded it again and installed without problem.

Dave