iOS 6 iPhone 4s battery drain

I deleted Exchange server for mail in settings... then did the backup local, restore iphone, then restore backup and then maunally put exchange back in via settings. Hope that helps.

IOS 6.1.2 is available.

try the reset all settings posted several times, That works for iOS 5 too.

IOS 6.1.2 finally fixed my battery drain, phone running super hot issue. I'm pretty sure my problem was caused by the Enterprise calendar issue.

if you disable the icalendar on Notification Center, the battery is much better

Hi, I had the same problem: Install IOS 7: It solved the drainage problem. IOS 7 supposedly has a much better power management for idle tasks. My iPhone 4s lasts for a day now with normal usage.

Let the battery drain out till 0% and then charge the phone for a couple of hours even after it shows 100% do it once every couple of months, you will get the max out of the battery charge.

If it still does not help then maybe the battery is long gone replace it, especially folks who have older iPhone's like 4 and 3GS, 4S guys might still be under warranty to get a free replacement. Don't wait go to a Apple service center immediately.

After almost an hour testing with location services on and off and writing down the battery level at intervals, I'm seeing about 1% every 3-5 mins drain, with it off I'm seeing 1% every 15 mins drain (around normal-ish). Isn't this the same thing that happened with iOS 5 when it went live? Perhaps it's the same bug that's come back to haunt us.

abyssunderground wrote:

That maybe so but it's no different to iOS 5 from yesterday which only drained to about 70-75% when I got home.

Turning off location services appears to have made a huge difference, and I'm wondering if it's compas calibration causing it. I'm currently testing this idea too by turning it off but leaving the other location services on.

It could be. I never turn compass calibration on since I don't use that feature much.

abyssunderground wrote:

Looks like I found the problem on my phone - Google latitude. It's excessively querying for the location. Disabling it seems to return the usage to normal but I'll keep testing.

What is google latitude? Is it an app you were using?

I have a WiFi only iPad3 and a iPhone 4. Before upgrading I could go 3 days with moderate to heavy use before charging on either device. I did my normal charging and left my iPad and phone on the chargerand run OTA upgrade. 3 hours after the upgrade the battery is at 70% with light use. I've turned off the location feature, Siri, and Bluetooth. I don't have any thing running in the background other than WiFi. The battery(s) seem to drain more if the device is looking for WiFi service. We were setting up a new wireless router and had to old one off. I noticed the both devices dropped by 10% while there was no WiFi signal. This was over the space of about 20 minutes. I'm thinking real hard about rolling back to iOS 5 until the issue is resolved.

I had a post on another site that I got this reply:

"Saw this post on the apple support community from a user named da_wob. I just got off the phone with AppleCare, and they told me how to fix the battery life issue.

Open up itunes on your mac or pc. Goto properties-->Devices-->check the "Prevent iPods, iPhones, and iPads from syncing automatically" box Click OK Connect your iPhone to the computer with your sync cable. Once you see the device show up on the left-hand side of the itunes screen, it should be fixed.  You can disconnect it and the battery life issue should be gone.

The Apple rep told me that iOS 6 gives better battery life than 5.1.1 did. She did confirm that the battery life thing was an issue for those who updated over WiFi. For some reason after the update, the phone does not stay connected to the wifi network, and connecting the phone to a pc that is on the network fixes the issue. She reassured me that this will not happen on any other network (say work or somewhere else). If it doesn't work, I will report back here."

I did try the fix suggested and it didn't work. I thought I would share it in the event it might help someone else out.

Yes, I was watching with app System Monitor Activity and the webbookmarksd is always run. I´ve tried to delete the bookmarks but I couldn´t.

Sometimes the CPU is about 80% of use with everything close.

And yes, in diagnostic and Usage Date I see a lot of entries about webbokmarksd... It doesn´t finish ever.

If you use the plane mode, the problem stop 😟

Same problem here. I tried turning off just about everything and my battery drained 1% every 5 mins. I went from charging once a day to 3 charges yesterday after ios 6 update. What i did was just downloaded 5.1.1 for my iPhone 4s and restored it. It worked this is very time sensitive before apple unsigns iOS 5.1.1. I'm so happy now I'm back on 5.1.1. iOS 6 is a fail. Apple needs to address this problem. Plus fix the maps big time. I do have iPhone 5 arriving today, I will have to see how battery life is on it. If it ok I will just get another map solution. But if not I will have to return it because of ios 6. And keep my 4s.

I have 2 Iphones - both 4S - I updated only one of them and there is a big difference in battery life...

I have noticed that under usage - Time since last full charge, usage and standby have the same amount of time.

After I took my phone off the charger this morning , I made one phone call for 10 mins - Had the phone sitting on my desk and 4 Hrs later, I was at 52% and my standby and usage both showed 4hrs and 10Mins so even in standby phone usage is going up.

I turned my phone on airplane mode and the time's sill remains the same - I think this is a problem that will need to be fixed by a update from apple. Even in airplane mode, usage is still ticking away and battery draining.