It has been about three weeks since I did a restore to factory and drained below 20% and recharged my 4S on 6.0. My battery life has been fine since and getting better... without any special action. I upgraded to 6.01 last week and battery life remains great. Yesterday at the end of the day, several calls, some surfing, some mail checking, and a little GPSing, my battery was at 81%. So, it seems obvious, that there are many possible causes, but if you get, the culprit located the problem goes away. JD
When I upgraded my iPhone 4s to iOS 6.0.1 a few days ago, the battery drain started. Dozends of crash reports referenceing "dataaccessd" as a process in question. I did a reset... didn't work; I did a network reset wiping all of my wireless network settings (as suggested in another forum)... didn't work; I did a full restore to a backup (as suggested somewhere else)... didn't work. I am out of ideas even after spending a few hours in forums. Seems like hundreds of people have the same issue for various reasons. Sometimes it's Exchange accounts, sometimes it's lost favourites in the browser, for my wife it was the "Viper" app, ... headed to the Genius Bar tomorrow hoping for a real Genius. It's not only Apple's stock that's going down. And I never thought I'd say this...
Just wanted to give an update… My phone battery drainage problem is worse and worse each day again. I noticed that technology reports are also criticizing the latest 6.0 .1 update for failing to correct the Wi-Fi bugs.
See the following link from ZDNet
If you are getting "dataaccessd" crash logs it's related to your Exchange Calender (Google / Hotmail also uses Exchanger Activesync tech), iOS 6.0.1 seemed to fix this for me. But you can try the full reset and fresh install to see if you can resolve it or just put your Exchange accounts on Fetch/Manual.
If you don't use the Calender, just disable it. Or if possible use the iCloud Calender.
But I find that server side (Exchange) can also cause issues which doesn't help with matters either.
As instructed by the customer care executive @ Apple, I upgraded my iPhone to 6.0.1. People, I am telling you, 6.0.1 drained my phone's battery at a much faster speed then 6.0 did. I charged my phone last evening, by 5 in the morning, it was 60% drained. By 12, it came down to 30%. Since, 6.0 upgarde, I have used this phone minimally, resetted it to original factory settings and yesterday as new phone. I have no applications on this phone. No photos and no music. Only 2 emails have been configured. I have browse the net even for 5 minutes, there is a drastic drainage. I have been told that since my phone is still under warrentee, it can be exchanged. But, we cannot revert to a previous version! I am very very sad . 6.0.1 is for users with iPhone 5.
It seems, I fixed it! (at least for the first hours it looks very good): full restore as new iphone. (Just as Thomas Lindner)
Problems were the same as usual: got only one day of battery in 6.0 with overheating and lots of bookmarksd crashreports. With the "fixes" of stopping iCloud safari sync it went back to better (maybe 1,5 days).
With 6.0.1 all **** broke loose and battery was down in 6 hours from a full charge. No crash indicators (no bookmarksd, dataaccessd or others), only indicator was the Usage/Standby same time thing.
Tried all the switchoff's with Exchange, Push, reset settings... no help at all.
Yesterday evening I did now a full restore (from DFU mode for what it's worth, but I don't think it makes a difference) and a painful setup as NEW IPHONE.
Now I have all settings back as usual, all services ON (location, push, wlan, notifications etc), all my apps back (not tried all, but many) to the following result:
Safari bookmarks are finally clean (no doubled or tripled Bookmarks Menu folders etc)
battery went down to 96% over 7 hours!! (Usage: 30min, Standby: 6:30hrs).
So I really hope this will stay that way. I didn't really expect it to fix the problem because I read of others who did that that it didn't help..... I'll keep posted.
Like probably many others, I had my iPhone profile+data used and migrated from phone to phone since 2007. Don't know whether that is really the problem, but I noticed that I also have some features now (like witth the extended german keyboard) that weren't there before with the old profile.
Finally... Yes, I'm also really disappointed in Apple right now because this is really a mess. But please don't blame the Genius people, because (as in any other company with a few more than 10 people) they are surely not told all the internal details of all problems with iOS now. And it's really hard to deal with a problem that is so unspecific with thousands and thousands of different user reports describing a problem that seems to have many different reasons and even more fixes that only work for very few users then.....
If they had an easy solution they'd tell you and they had it fixed already. So the Genius Bar probably knows not much more thant we all here, but that's not their fault.
Hate to disappoint you, but you'll find it doesn't last. I did the same thing and it was fine for 3 days but was broken again yesterday. I deleted the one app I'd installed and that didn't fix it, so I disabled the server side push for that app and all seemed ok. But this morning it's draining again and the only way I've stopped it is to turn off all data and location services ie turn it into a dumb phone.
Apple is pathetic taking so long to solve this.
I have a 2 year old iPhone 4 updated with ios 6.0.1. After reading so many battery related comments, I am now worried about my phone too. I am not very expert in using iphone apps, use mostly for basic phone activities and few safari usage.
Here is my USAGE screen info:
Battery Charge is now at 52%
Time since full charge:
Usage 5 Hours, 4 Mins
Standby 3 Days, 9 Hrs
Can any one tell me I am OK with battery life or in danger zone? Help please.
If you've gone 3 days without charing your phoneI think you doing pretty dang good, lol. A lot of these people on here can't go 6 hours without having to charge their phones.
For me, for some reason it seems to be speratic now. 2.5 hour stand by and 30 minutes usange and im at 99%. Sometimes with that id be to 95% or 90%
Yesterday I went to about 6.5 Hours Usage and 14.5 Hours Standy and got it down it 10% before I plugged it up. Not the greatest but it gets me through the day.
I wish that Apple would tell me the same thing. My phone is not even four months old and because of the "water damage", I would have to pay to exchange my phone, which is pretty crappy considering I've never had battery problems until I updated to 6.0. All I want is a new phone, or my battery problems solved. It's really not that hard Apple shouldn't have a hard time figuring that out considering that there's so many of us out there. And also they need to really ramp up their genius bars. The people that I've gotten when I'm gone in there tend to write me off because of my age (I'm 18; probably some punk kid is what they think). And, as an added bonus, they genius broke my case too.