IOS 4.3.3 battery life has been significantly reduced

Yesterday's success was apparently a fluke. It was not uninstalling those apps that made my battery lasted longer.

This morning, after I unplugged the phone after a whole night charge, in less than 15 mins of use, the battery goes down 2%.

However, I may found something else. I was using SYSINFOPLUS app, when I found that my load average has been about 1.5-1.7 (read somewhere that it shouldnt reach more than 0.0-something on idle. Yesterday, when the battery was "ok", the 1,5,15mins load were around 0.30-0.40.

The second thing I noticed in SYSINFOPLUS was: under "LOGIN USERS" in the "SYSTEM" tab, there was no user logged in. Yesterday, if im not mistaken, the list wasnt empty.

Therefore, I opened up terminal app then logged in as root. All of a sudden, the load average decreased to 0.02-0.1 on idle. Now the battery is still hanging on 100 % after 1 hour of fiddling around.

I'm no tech or IT expert, I honestly don't know the connection of what i did and the battery drain.

Please try this fix out.. Thanks.

Also, yesterday i found out that my phone maybe infected with the ikee virus, so i removed pc-pbot or something from my process list, followed by changin my default root password to something else.

Have you tried this solution, originally posted by Hankerin?

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I can safely say that with my phone it definetly has something to with my MS Exchange calendar - not mail, not contacts but calendar. We're using Exchange 2003. I've done probably twenty restores - all as a new phone. And through trial and error was able to substaniate that at least with my iPhone 4, it was the calendar in Exchange which is now set to OFF (and syncing with a USB connection). I've got Push going, BT on, 3G on, location services on, logged in on the App Store - pretty much everything ON that folks here have suggested turning OFF. The phone was pulled off the charger at 5:30 AM yesterday (Tuesday) and I'm at 41% today (Wednesday) at 4:23 PM (nearly 35 hours). The only charge it has seen at all in this period was maybe the two minutes I had it connected to my laptop for a calendar sync. And I can duplicate the issue at will merely by turning the calendar ON. And fix it by turning the calendar OFF. And I've put all my apps and music back on the phone. I sent a bug report and will continue to sync my calendar through the USB connection until we see another update. Hopefully it'll be fixed then because I use the calenar a lot and syncing as I am now is a royal pain. Never experienced anything like this with my 3G or the 4 (which I've had since the day it was released).

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I turned off Exchange Calendar Sync it the problem was resolved for my 3GS, too.

I even confirmed it with an app called "System Status". I could see that, when Exchange Calendar Sync was activated, my CPU load was almost constantly at 100%. After disabling Exchange Calendar Sync, it dropped down to a reasonable average around 5%-10%.

This issue did not exist before 4.3.3, so it is a bug that needs to be fixed in a subsequent iOS release.

Just an update to my previous post.

I have used the iphone for a week and still getting excellent battery life since doing the steps I suggested.

Replying to my post about my wife's iPhone 4.

It went completely dead over night. When I woke up, I charged it until 9:30 when it was full.

We had a Genius appt at 11:30 so we didn't touch the phone until then. The charge was at 99%.

The Genius could find nothing wrong with it using the diagnostic tools that they have.

Since then, it's worked wonderfully. It's hardly used any battery at all under normal usage.

I've seen other posts about letting the battery drain completely. Maybe that did the trick this time.

annatech wrote:This issue did not exist before 4.3.3, so it is a bug that needs to be fixed in a subsequent iOS release.

I beg to differ. The issue has existed with every release in the past 3 1/2 years going back to 2.0. It only affects a few phones each time, but it has been a persistent problem since the beginning if iPhone time. It can also happen spontaneously weeks or months away from an update. And the solutions have been the same since release 2.0.

It is not one problem; it is a symptom of a problem, and the potential causes are many. Virtually all causes are related to applications sending or trying to send data continuously. Which is why you see so many solutions in this and other threads that work for some people, but not for others.

Havent had any problems since upgrading to 4.3.3. iPod touch 4G was 5 months old and supposed to have a powerful battery, yes it has, and yes, didn't have any problems with the new iOS.

PUSH email- OFF

PING - OFF

Bluetooth - OFF

Location - OFF

Notification - OFF

Airplane mode - OFF

Wi-Fi - OFF (On only when needed)

Appstore - Signed-out

Played music and set the volume to 70% from 9:00 PM 100% Batt to 8:00 AM 68% Batt - Battery consumes 32% - Music are mp3 and 320kb bit-rate.

No theme just a wallpaper, non-JB, about 70 Apps, birghtness set to 35% I guess, or 40%.

When I play a heavy 3D games, such as (Epic War TD, rainbow six, etc.) it consumes lots of battery charge but I can play for it for 3 hours and still has 22% battery.

I tried to set all those to ON believe me it didn't have enough impact to drain battery so quickly. But the hours of using it of course will reduce because all features are enabled even if I'm not using it.

But for some reason, mostly on iPhone4 & 3GS, issue with battery on 4.3.3 occurs.

Turning OFF features is not a solution. There are lots of iphone users uses most of iPhone features and we cannot let them try to turn OFF what they are using or restore the iOS etc. etc....

There must be some terrorist inside iOS 4.3.3 that terrorizes the battery even in idle mode. But some iPhone users when turning OFF the features, battery went ok.

If you analyze all issues been posted in here, I agree... Yes its iOS issue. not a Hardware fault.

I'm just sharing my 2 cents m8s.

Last night my iPhone 4 suddenly drained very quickly (1% every 2 minutes) after I changed an entry in my phonebook. The phonebook became hanging and slow and jerky in scrolling. So I remove all entries in my phonebook and resync. Now the battery life is so good, only used up 20% for a whole day with wifi, push email on.

Annatech / Hankerin may be on the money.

Since IOS 4.3.3 my ipad calendar has been unable to synch with Exchange server, and battery life has been appalling. Once I turn off Calendar Synch, battery life is back to normal. I also had a problem where I couldn't delete emails from the ipad on any account - gmail, bigpond and exchange. This is also fixed. Suspect a bug in Calendar synch that ties up the cpu (battery loss) and by continually polling the server interferes with ability to synch all mail / calendar data.

From other posts, this bug may also apply to other synchronization functions such as contacts, which I wasn't using. Suggest you turn of calendar and contacts synch if in doubt.

Aren't all these battery drain fixes just switching off apps and services that use the Apple Push Notification service? And aren't Apple preparing for big changes to their cloud services with the (re) launch of MobileMe & iTunes using the North Carolina data centre? Are the two connected......?

ive been reading all the posts in here and its true the fact that every iphone battery issue fixes of different way.

im gonna described my experience with my i4 with 4.1 ios lock by at&t and unlock with gevey sim, im from mexico and i fixed this way.

i upgraded my i4 because some apps i wanted to used with gps needed 4.2.1 or later so i thought why not 4.3.3.

at the beginning with 4.1 my iphone battery lasted for days and no problem with that. After the upgrade to 4.3.3 my battery was draining very fast even in standby mode.

i turn off push, wifi, sign out applestore, did the hard reset thing, i recharged the battery from less than 20% to 100% several times and nothing to gain improve.

so, i decided to restore setting as new phone and the result was the same. I did all this with my new imac with less than 1 month of use. i used to do all the sync with my laptop and only pc with xp before having the imac and no problem at all. when i bought the imac i sync it with the imac and downloaded all the music again and no problem, i was still with ios 4.1.

so, after 2 weeks of recharging every night the ****** iphone i decided to restore from new from my old laptop with xp, and so i did. The result.

Long time battery life again. all that with wifi always on and sign in applestore, i just turned off push and ping

i wanted to sync back my iphone from my imac to see if the problem showed up and nothing, i reinstalled all apps and music with the imac and the battery life was as normal.

the only thing i did different than the always posted solution of restore as new was that i did it from another computer and then i went go to sync it with the one i always use.

i hope this helps anyone with the issue or even give a clue about a solution.

sorry for my english, i forget about writting

I restored to new phone.Just sync with contacts, canlender , bookmarks and install what's app and capcom arcade only, the battery usage keep normal. But it is not funny with no apps.

You can start adding apps back, a few at a time, until you find the one with the problem. There nay not be any with a problem, because it could have been bad data in an app.

I wait to new iOS and then adding back all apps...............I restored to new iphone for three times in iOS 4.3.3.

I read all the posts about battery issues in Iphone 4.3.3 .

I bought the iphone 4 last week the first two day was fine, when I did the update to 4.3.3 (non-jailbreake) the battery drains dramatically. Every morning is 10% .

I really did everything to reduce the drain I switch everything to OFF but nothing different.

Last night I did restore nothing again.

I dont know what to do next, I dont know whats wrong and what cause this problem.

Im affraid that is defective.