Just got off the phone with an Apple rep and provided my battery logs for the past few days.
He mentioned it will go to engineering and they will likely incorporate something to improve things in an update.
I'm not really sure what was causing my battery issues, as they seemed to occur after numerous app updates a couple days after iOS was updated. I did not notice it right after iOS 6, but after a couple days of updating apps the battery loss was very noticable.
A one time closing of all background apps, turning iCloud off, deleting all mobile safari bookmarks, cleaning out my mac safari bookmarks, re-enabling icloud, letting my phone drain to zero, charging to 100% and power cycling (holding down power and home buttons until it rebooted) and setting only critical email accounts to fetch instead of push helped a lot. I'm not sure what fixed it since I feel I tried everything but a full reset as a new phone. Also, not sure if it matters, but none of that seemed to help until I left it alone for a few days so maybe it was an unrelated app update that fixed it, or maybe it needed a few days for the new settings to work through.
Safari and iTunes still seemed to occasionally drain more than before so I submitted the logs to Apple and I hope it helps them add more refinements to the update they're working on.
Think i've fixed mine!
OK so I have posted a few times but seem to have fixed my 4s after trying what I thought was everything...
When I first installed iOS 6 I played around with shared photo stream and set up a stream and subscribed to one. Shortly after, I started with the drain issues. I had however switched off photo stream and the shared photo stream.
So playing around this morning, I turned it back on and noticed I still had a stream "active" (although switched off) and was subscribed to one. So I deleted my stream and unsubscribed from another and immediately - battery life back to normal.
Seems to be a bug of syncing even with it switched off - so try switching it on then deleting your own shared stream and unsubscribe from any you are subscribed to.
Yesterday I took my phone off full charge at 7am and by 9 it was down to 75% after a couple of texts, one 3 minute call and a couple of Facebook checks. While phone was on it ran hot and the meter was going down about 1-2% a minute. By 4pm it was on 9% and dead, all the while extremely light usage.
Today I took my phone off full charge at 7am, it is now 5pm and it's on 75% having used it normally and haven't changed ANY settings at all since yesterday. What the heck is going on has it magically fixed itself or will it be another story tomorrow?? Very weird.
I even faced the same issue on upgrading to ios 6, battery life on ios 5 was amazing.
But now am facing one more issue, how much ever i use the phone, battery is staying at 100%. Then when battery gets over (even though its showing 100%) the phone will switch off, now if I connect to charger, it will show 100% charge again. Tried restoring many times, till now same problem persists.
I am facing the same issue. Till yesterday, my iPhone 4's battery was draining out in a few hours even if the phone was not in use. I deleted all my apps hoping the battery to recover, but Alas!
Today morning, I restored my iPhone to its battery settings. I recharged my phone at 11. It is 4 PM now, my iPhone's battery is at 95%.
You guys (if not done already) can also try this method. The iOS is still 6, but the drainage issue has taken a stand by.
So here's the latest update on my 2 phones testing..
Phone 1 - no sim card but everything else 'on' and running off wifi.
Phone 2 - fully loaded and using as normal.
I took them both off charge at the same time this morning.
Phone 1- 30mins use standby 3 hours 28 battery at 97%
Phone 2 1hr 34 useage, standby 3 hours 28 battery 80%
So.. I realise i've not been 'using' one phone as much BUT it's looking like it could be to do with the SIM card - and cell network? Perhaps the SIM cards are not working properly with the new OS.. so some have had better results because resetting the phone causes some difference in which network masts the phone locks onto?
I dont really know now .. clutching at straws.
I have to restate that after one day of restoring and charging, the phone is back to what happened before, phone's juice drained dramatically, about 20 per cent within 1 hour, I even deleted almost all apps but things didn't change, so I hope Apple would fix this soon, a new firmware update or whatsoever.
I so completely agree with Greg Bastug1.. if a reset (and all this darn tweak this and turn off that and reset this and disable that) was necessary, then shouldnt it be part of the upgrade process and when your phone turns on it's ready to go (all tweaking completed automatically - or, even better, NOT NEEDED!)
I have now reset my 4S 4 times, including what the apple store tech called a 'deeper reset' which included the firmware apparently (no kidding?) and everything is turned off - icloud, push mail, location services (except for Siri and I do love Siri's help in the map app), and when I'm not using the phone for a while I turn to airplane mode to try to desperately save battery life...
I know everyone here is as frustrated as I am - some seem to have had improvement but most of us haven't. I feel like we are not being heard by apple. My ipad battery life is crap too after the upgrade but I dont use it as much so it isn't the huge impact that I'm feeling with my "pared down" phone..