Q: iOS 6 iPhone 4s battery drain
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Sep 20, 2012 5:05 PMby Morac.,I had/have the same problem on both my iPhone 4s and iPad 2 yesterday. I updated both OTA and the battery was dead on both before I went to sleep, despite not using the phone that much. I had done a reset and also a "reset all settings" on my iPhone.
From a battery off (low battery) state, I charged both up to 100% over night. I then noticed the battery drain wasn't happening so I figured that fixed it. I went all morning and only got down to about 95% with 1 hour of "usage".
Then I ran Maps to show a co-worker the new Maps. After doing this and playing with Siri a bit, the battery started draining steadily. It went from 92% to 75% (with 90 minutes of "usage") to 62% (with 2 hours of "usage") in a few hours with me not using the phone at all. Maps is in the background, but it isn't doing anything like directions or anything (no location service in use indicator).
Currently I'm at 62% with 2 hours of "usage".
So there's something about Maps and/or Siri that's causing the battery to start draining very quickly. I noticed the following processes started running after using Maps:
absinthed.N94
calaccessd - runs when Calendar process is in memory
sociald
webbookmarksd - runs first time Safari is run
assetsd
accountsd
I rebooted my iPhone 4S and it immediately showed 58% battery (a loss of 4%) and only the assetsd and accountsd processor were running, the other 4 above were not. Calaccessd is part of Calendar and runs whenever the Calendar is running.
That leaves the following as being the probably cause:
absinthed.N94
sociald
webbookmarksd
Of note, my iPad 2 is still showing 100% battery after all day with light use. I never loaded Maps on that. None of the above processes except accountsd, is running on that.
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Sep 20, 2012 5:06 PMby preludio,I updated to iOS 6 via iTunes/USB cable. This is not an OTA-only problem.
I'm losing 1% of battery every few minutes when I use the phone, less when on standby. It's obviously far worse after the upgrade. I've reset the phone and turned off a few location services.
The phone is hot, even in standby, so clearly some process is running continuously.
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Sep 20, 2012 5:31 PMby Morac,I think the problem has something to do with either Siri or driving directions. I just tested running Safari, Calendar and Maps after restarting and I'm not seeing crazy battery drain at the moment.
None of those cause the absinthed.n94 or sociald processes to run. Calaccessd runs when Calendar runs, but stops running when Calendar is killed. Webbookmarksd runs with Safari keeps running after Safari is killed. Nothing seems to run when Maps is run. Currently Webbookmarksd is in my process list and battery still seems okay, though I'm going to keep track of it. Currently it's at 54% with 2 hours and 20 minutes of 'usage" and 11 hours and 19 minutes of Standby. It seems to be losing 1% every 10 minutes now with no usage other than checking the battery every 5 minutes.
Both times I started noticing crazy battery drain, I had used Siri to ask for driving directions, but I had also used the camera and did some other things. So next time it gets stable, I'm going to try using features one at a time until something goes wrong.
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Sep 20, 2012 6:51 PMby Greg Bastug1,Remember, this really disables lots of things that may be causing issues in real world use - Siri is diabled, all Location Services are deleted, Wifi is disabled. So only after you turn on all the things you would expect to use will you tell if a reset all process works.
I mean, turning if off gives you great battery life too...
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Sep 20, 2012 9:42 PMby samboydh,I have kept most of the the location services on with my last fix, the last fix for me drops the photo sharing which I find to be creepy and useless for me. For me the value is not being tied to a charger like I was I. My droid 2 global even with the back up battery.
