IPhone 4S 5.1.1 Battery drain, fixed for my case

I just got a 4S, to replaced my missing iphone 4.
The firware was 5.1, so I upgraded over the air (using the phone alone) to 5.1.1
Then I restored by phone using the back up in iTune.
But I realised my latest backup was in iCloud (I did not backup all apps in iCloud), so I restored with iCloud again, after goto Reset Settings two times.
Starting to use the phone, experiencing very fast battery drain, 1% drop every 2-3 minutes.
at one time I notice the battery was hot and battery drain real fast. I found the reason:
the iCould continue to restore but stuck. Just goto Settings - iCould -Storage & Backup, at the bottom you see iCloud Restoring (or something) then phone..
Just cancel or stop it. Because in my case, all the apss I needed already restored.
Next day I still experiencing very fast battery drain, 1% drop every 2-3 minutes. I tried all the Location Service - System Services - Setting Time Zone (it is on all time (purple)), but actually its not the culpit, my friends has this on and all the time has a purple arrow, no battery drain issue.
Also tried removing email accounts, in my case, it still does not resolve it.
I decided to have a clean upgrade to 5.1.1 (over 890MB) instead of the phone over the air upgrade (50MB+), so I connect the iphone 4S to iTune , has it synced and backup.
Click the restore, and iTune download from apple and wipe/upgrade to 5.1.1 again. Restore it from itune after that (not set as NEW phone),
TA TA!!
All the problem gone.
Hope this help, if you have similar case like me.

It is me again, just to explain that the thing that sems to lock up the computer in step 7 of 7 is "Syncing GEnious Data to iPHone". I don't know if that helps, but any thoughts appreciated.

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THE FIX*
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I can only relate my experience, but so far my iPhone 5 has shown the best battery life of all the previous phones. The only thing I've done is to let it drain down to about 15%, shut everything down and then restart the phone with the charger and let it charge overnight. This may be old wive's tale/voodoo but it doesn't hurt anything so I always do it with a new phone. My wifi is always on but I don't use bluetooth. Anyway with the same usage as my other iPhones including a little more since it is a new phone to me my battery life has been great.
I didn't get the phone on the first day it was released, it came a week later. In the meantime I was reading that very long thread about battery life and was concerned I might see a problem. So I was keeping an eye on this and have had no problems. There may be individual phones with such an issue but it doesn't seem to be significant, at least we haven't seen reports in the news the way we have about the Maps app!

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Audio playback: Up to 40 hours
Knowing what you were using it for would help

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Recently i have purchased Iphone 3gs with software 3.1.2. I'm facing a serious problem of battery drain. Without doing anything, the battery drains so fast. Is there is any way to over come this problem?

Here's what I do that usually keeps battery life accurate. Drain the battery till it's dead, charge up full and do a hard reset while it's still plugged in and it usually works. If this fixes it just keep killing the battery and charging it full. If it acts up repeat steps above. Mine works almost everytime when it starts acting up. I was just trying things and this worked. Hope this helps

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Hey all,
i suffered from the battery drain issue with my 2 iPhone 4S's. I found that when i used cloud backup and WIFI sync, the WIFI would continously stay on in standby mode, which was draining the battery very quickly.
I turned OFF iCloud Backup AND WIFI Sync
and this seems to have resolved my issues. Now wifi turns on when in standby.
Unsure if this is your problem?
Leave your phone in standby for around 5 minutes, press the home button to light up the screen and if you see the wireless icon straight away then you know this is your problem. You should normally see the 3G logo then it should initiate the WIFI and connect.
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optimans wrote:
Hey all,
i suffered from the battery drain issue with my 2 iPhone 4S's. I found that when i used cloud backup and WIFI sync, the WIFI would continously stay on in standby mode, which was draining the battery very quickly.
I turned OFF iCloud Backup AND WIFI Sync
and this seems to have resolved my issues. Now wifi turns on when in standby.
Unsure if this is your problem?
Leave your phone in standby for around 5 minutes, press the home button to light up the screen and if you see the wireless icon straight away then you know this is your problem. You should normally see the 3G logo then it should initiate the WIFI and connect.
Has been great for a few hours now, even with Microsoft Exchange (Push Method), background apps and Siri.
Hope this helps you as it did for me. I've sent feedback to Apple and hopefully this issue will be fixed soon.
Other workarounds that may work:
Turn off Time Zone in Settings
Disable location services for reminders
Let your battery drain fully and power itself off and fully charge (Full battery cycle)
You may have discovered the problem. Since I bought the 4S never enabled those features. Never had the battery problem. After a day with full charge and about 20 calls, I still have 90% !

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Message was edited by: ckuan

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IPhone 4S 5.1.1 Battery drain, fixed for my case

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