Q: iOS 6 iPhone 4s battery drain

I did 3 iphone resets since upgarding to iOS6, and turned off all of suggested items, and still no change to the battery drain. It worked well after the initial upgrade, and this started happening after 10 days. It works OK after each reset for about 1-2 days, and than the drain starts again. This happened only after upgrading to iOS6, so I am recommending everybody around me not to upgrade. (except a few friends that upgraded like me, and have exactly the same issues)  So dissapointed by Apple for not looking into this promptly, we should be able to trust them when the new operating system is out. I am carying a charger everywhere with me now, I'm using the phone for business as well, and not being able to realy on it anymore is frustrating.

Hi all, I have had a 4s 64Gb for around a year now and battery has been good, with reasonably moderate to heavy use during the day (though I only switch on BT and wi-fi when I need it).

Anyway I upgraded to iOS6 and all was OK (leaving aside the various functionality gripes widely reported). However in few days battery started draining like crazy for no particular reason, including dying completely the other day.

After scratching around I found out about the Apple iPhone config utility and took a look at the logs it creates, what I did notice was the "[com.apple.persistentconnection[dataaccessd,83]] is telling PDP context 0 to go active." message appearing approximately every 3 seconds, even when the phone should be idle.

I turned off push email after reading a few posts and it disappeared, this stopped these log messages immediately. After also following some useful tips posted elsewhere about switching off various ad tracking services buried away in the settings, I also deleted my Exchange push email profile that I have for work.

I then immediately added it back in again and these message appeared a couple of times (obviously where it was polling the server), but were no longer appearing one after the other, again and again.

It would appear my Exchange email profile had got corrupted and was causing this continous comms check which was draining the battery and making the phone get hot. Deleting the profile and adding it in again seems to have fixed it, so fingers crossed I'll be back to my usual of battery life (BTW before this problem occured I could go up to in the region of 2 days without the battery dying).

iOS 6.0.1 is out

Looks like it might fix the exchange calendar bug....

Change log

• Fixes a bug that prevents iPhone 5 from installing software updates wirelessly over the air
• Fixes a bug where horizontal lines may be displayed across the keyboard
• Fixes an issue that could cause camera flash to not go off
• Improves reliability of iPhone 5 and iPod touch (5th generation) when connected to encrypted WPA2 Wi-Fi networks
• Resolves an issue that prevents iPhone from using the cellular network in some instances
• Consolidated the Use Cellular Data switch for iTunes Match
• Fixes a Passcode Lock bug which sometimes allowed access to Passbook pass details from lock screen
• Fixes a bug affecting Exchange meetings

Read more at http://www.cultofmac.com/199306/apple-releases-ios-6-0-1-for-all-devices-includi ng-4th-gen-ipad-ipad-mini-developing/#A4DcscO5bc0mkBRt.99

For me push email was the problem. I too deleted my email accounts (pop & imap) and set then up again but not using Exchange. Now use fetch email every 30 secs. It has worked for me.

installing now.  hope it works.

I didnot read anything about the batterydrain. Should I update or not ?

Yes, you should always update to the newest IOS.

Even though it doesn't state a battery fix, updating to the newest IOS might help.

Seems to have improved my LTE speed, with the same signal strength.

Give it a day for more comprehensive feedback.

razmee209 wrote:

 

Yes, you should always update to the newest IOS.

Sure about that?

hansfromzoetermeer wrote:

 

I didnot read anything about the batterydrain. Should I update or not ?

After the mess 6.0 created, I suggest you HOLD OFF for a day or two to see what the verdict is on 6.0.1. Especially if you are currently on 5.1.1

I am still on 5.1.1.  Monitoring the 6.0.1 threads on multiple forums, I'll decide if I am willing to chance an update to 6.  I refuse to sacrifice battery time, functionality and $$$ over excessive data usage resulting from another botched 6.x release.  The verdict is out for now.

I had previously posted the same experience.  After finding that Exchange Push was my battery-drain culprit, I restored the account as push and it immediately started to drain fast again.  I now have my Exchange account using Fetch instead.  Since then, I have no battery issues whatsoever.  I'm using Safari, tethering, bluetooth... you name it, with no out-of-the-ordinary consumption.  I'm not turning cellular data off any more.

I noted then that the iCloud account also uses Push, but it's not giving me any trouble.

Good point and probably decent advice. However for users already having issues its better to go ahead and update. I can tell you iOS6 was hands down the best for me as far as battery life. Better with iOS 6 on a 1 yr old battery than it was out of the box new with iOS5. 5.0.1 helped, 5.1 was better then 5.1.1 was about the same. 6 made substantial increase. Anyway good advice for otherwise working devices to see what happens to hold off a week or so but these forums are NOT the place to make your final decision. Remember 99% who come here do so because of issues and are looking for help. So with millions of devices out there the handful here  having problems (in the grand scheme) should not make your decision whether to upgrade or not but certainly gives you some information of potential issues/problems.

Not looking good    Battery was at 100%.  Did the install of the new version of the OS via Itunes.  A few hours later and i am at 38%.  Not happy.

let it fully die out and then let it fully charge, uninterrupted.   Then see how the battery life is.