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

The exact same thing with me. With 100% everything is looking good and you are thinking ITS FIXED! Until 98% comes... I sort of just refuse to accept that this is the product. That this is what everybody has. I can't believe that. Of course apples numbers are not the real world but

My battery life is less than HALF of what they advertised.  I don't believe that it's accurate. I sound so repetitive and I apologize for that. The confusing part of this is that this crazy battery drain started for me on my iPhone 4 the second ios6 was installed. So it's really hard to know what is going on here. Are these phones defective or is the software too much for the batteries to handle or BOTH!? Honestly, I have yet to receive the product that I purchased.. I will keep exchanging them until I do.  I am one of the lightest users as far as screen brightness and all of that other stuff that apple recommends for you to do to save battery. Literally I don't use anything. This shouldn't be happening. That's all

Time to post this again. 

Here's the section on battery life, but the whole review is loaded with a lot of good information. Couple take aways are, even with their "real world" numbers iPhone 5 stacks up pretty well against the competition. Secondly, the reviewer never once mentions defective hardware or software. 

My feeling remains that Apples engineers are continuing to work to optimize iOS 6 with all the actual data being collected. Hopefully this will translate to some future improvements.

Oops. ;)

http://www.anandtech.com/show/6330/the-iphone-5-review/13

Please. . .3 hours and 45 mins usage and dead. Every imaginable notification and GPS and whatever else turned off. Impossible to get through a day. Mixture of 3G and 4G, surfing net, flipboard, emails and a few phone calls. . . . .and this is my third phone, set up from DFU with fresh ios 6.0.1

marine8,

Auto brightness is not broken just working different to how it use to, video below:

http://ansonalex.com/videos/iphone-5-ios-6-auto-brightness-not-working-fix-video /

I actually prefer the new method of control as the previous auto brightness function never really seemed to work the way I wanted it to, which was to allow me to read the screen in almost all light conditions (super bright to super dark room).

With a bit of adjustment to the default light levels I can now read the screen just fine in bright conditions and dim conditions, a huge improvement in my books.

With no iCloud on, if your crash logs contain "dataaccessd" its possible that its your email calendars that are the cause:

Anything using activesync tech, which includes:

- Google.

- Exchanger Server.

- Possibly Hotmail as well.

Can be causing the issue. Maybe worth carrying out a full reset again and only add one email account at a time.

Other than that are you a heavy data user?

Cheers Player 8. . . . no issues with calendars, but reasonably heavy data usage today on 3G/4G. I would have thought we could get more than 3 hours 45 mins. . . . but maybe I am wrong.

Check out page 144 of this thread for my battery usage graphs. It is possible to drain your battery down in 3 hours 45 mins if you are a heavy user, especially with LTE.

I noticed something interesting today while using my phone outside (nice sunny day), the screen was nice and readable / LTE was max signal / browsing flipboard and noted that the phone was getting a little bit warm. Looked into the brightness setting (auto brightness - on) and the slider had moved itself almost to 100%. In this scenario it was using about 0.5% per min.

I turned slider back to the left without affecting visibility too much, which reduced the battery drain a bit. Was you viewing in bright conditions?

Standby : 16hrs 24mins

Usage : 4 hrs 22mins

Battery at 32%

I've got no icloud, no auto brightness, basically every **** off include LTE

I've got only 1 sync email acc which fetch/push was set to manual.

i definitely think the issue lies in the ability to go into the power save mode... sometimes it works, sometimes it does..

the other day, i unplugged my phone and put it on my table... came back just over an hour later and after never touching it once.

1 hour 25 minutes usage

1 hour 27 minutes standby

now, my numbers are not always like this, it appears random when the power savings will fail

Update on DFU reset below. Question for the group: Has anyone successfully exchanged an iPhone with battery problems for one that doesn't have them? I always seem to read about those who are on your 4th replacements... never the stories with the "happy ending" -- which could just be that you got a good phone and then ditched the forum. BUT - has anyone gone in, received a new phone, and walked out problem-free?

Now, DFU: Reset seems to be a dud. I did the following:

-DFU Reset

-Reloaded my most freqeuntly-used apps

-Recharged overnight

-Rebooted my phone while plugged in

-Switched of LTE

Battery drain is exactly consistent with the pre-reset.I read Echo Station's article from AnandTech - Their theory about why LTE should make the battery last longer certainly seems to have been born out in their tests. BUT - I see none of the "dynamic range" they mention in battery life. My battery drains like clockwork no matter what - Music, videos, web - its always dropping 1% every 2.5 minutes on cellular.

The 1st pic was ment to b snapped at 99% (7:59am). It seems that my battery holds good from 100% to 99%. After it drops the inital 1%, it drains real fast, like 1% per 3min. I read in this thread, on pg 145 r so, an article talking about how Apple knew of a problem with the battery during assembly of the phone but did nothing to resolve the issue in fear of a delayed release date. Now that the I5 is out, I personally think that this issue will not b resolved and the only way wld be to do a mass recall and we all know that wont happen.

Link to the article is on page 146 posted by AlwaysLooking4answers.

It's only worth getting another from Apple if you confirm it's a real hardware fault, as most of the issues point to software there really isn't any point in getting another phone only to repeat install and have the same issue appear on your newer iPhone.

When you performed the full reset, did you setup the phone as new and enable features / apps one at a time?

I did set up as a new phone, set up my iCloud account (but didnt restore from iCloud) and then began using it to surf around on LTE (to establish a sort of baseline with a fresh install). Next I set up my personal gmail via exchange and my work exchange account. Then set up Facebook integration/installed Facebook. Then began to install other apps.

At no point did the battery drain present a noticable improvement. I was initially very excited when it took 10 minutes to drain to 99% - but was too quick to get my hopes up, as we've already discussed.

I'm not sure what the source of the problem is. I'm one of the (few it seems) who's iPhone 4 and iPad suffered no problems with battery drain on iOS 6, which may explain my predisposition towards it being a hardware fault.