iOS 4.3 causing battery drain

Received new iPhone 4 a few days ago and have spent an unacceptable amount of hours tinkering with it trying to stop the battery from draining approximately 1% for every sent email; 3% per song, and 10% for every hour sitting idle. Have tried all of the recommended fixes and nothing works. I am not running any apps have tried disabling everything and find all of this an absolute waste of time and source of bitter frustration. Am returning the device to Verizon and exchanging for something else. Apple stinks for allowing this problem to go on for so long.

I just replaced my iPhone 4 with a new iPhone 4 (different carrier), and after the restore of the new one (from a backup created using iOS 4.3.1), to iOS 4.3.3, the battery life and over-heating was terrible (13%/hr in standby).

I have now restored as a new phone, and the battery life is fantastic (1% in 2hrs) - so at least i know its not a defective phone. However, I don't have any of my backup info on the phone (ie. app settings, mms history, etc.). Any tips on getting that info back on the phone, without restoring the terrible battery life?

Also mine...just updated my iphone4 to ios 4.3.3....i thought if you have the latest update your battery will last longer... NOW ,my iphone 4 DRAINS FAST plus OVERHEATS upon using it (no open apps,call,SMS,etc.)...trying to restore it again"setup as new iphone" and still NOTHING WORKS!

BADLY NEED HELP.....:(

I'm a user of Active Sync Exchange for Hotmail (a great way to sync my home & work pc's, as well as my wife's and my iPhones OTA - calendar and contacts). When I did a restore I was burning through over 13% an hour. When I restored as new, it was using less than 1%/hr - it wasnt a hardware issue. So I restored from backup again, and found on a message board somewhere that you need to go into your mail settings and turn off all your exchange syncs, turn off/on your phone, and turn the syncs back on. I'm now back to using 2-3%/hr with push, location, etc. all turned on.

Hope this can help someone.

So, my problem is FINALLY solved. I upgraded to 4.3.3, did a clean install with no backup, let the battery discharge and then charged it fully, and now i have my battery life back, finally! I am now with 2 hours of usage and 18 hours on standby and the battery is still at an amazing 80% capacity. Now i'm happy.

I experienced the same problem, which is rediculous in light of the volumious posts here, and other thousands of posts one can easily find through an easy web search, yet Apple has done nothing about this!

I unfortunately updated my iphone 4 to OS 4.3.3 when I was prompted by iTune. I tried soft resets, and hard resets (wipe the phone and reset as a new device) numerous times before I gave up (of course all data is lost). My phone was warm all the time too. I went to a Apple store and they could not fix it, so they replaced a new phone. I did not know it was the OS causing the issue, so I unfortunately updated the OS again when I was prompted. Then my misery started again.

Then I realized the OS might be the problem since it was the only thing I did after I got the replacement phone. I have again tried soft resets and hard resets. Nothing worked. It seems like I might have to go to the Apple store again for another phone.

I also started having EXTREEMLY fast battery drain on my iPhone 4 a couple of days ago. Ver 4.2.3. I tried everything listed here. Nothing worked. As a last resort I tried updating to 4.3.3 now my battery seems fine!!

YAY Apple

Does the iOS 4.3.4 update solve the background traffic with App Store signed in or Facetime enabled?

Anybody tried?

lolz. that post smells very fishy.

The ame Here. This really *****! Apple fix this Bug. I updated three days ago and since then I can't make 8 hours of use. Before the updat e everything was fine and i could even make 24 hours. whats wrong??!!!!

Had the same issues with my new iPhone 4 - read all of the various threads. The thing that has worked for me is signing out of the App store. The frightening battery drain has gone.

I think this is partly to do with whether there is some NEED for data to be pulled in to an app. I hadn't updated my credit card details in my iTunes account, so when trying to download new apps was held up. Rather than getting my credit card to update, I was just cancelling and closing down the app store, but I wonder whether there remained a background process going on?

I've also noticed that when out of range (like at my parents house), the battery drains quicker as the phone tries to find a signal - possibly for the App store data needed - so I flick it on to Airplane mode, and it's fine!

Hope that all helps.

One way to make sure there isn't anything isn't running in the bachground... Double tap home button. Then hold an icon until it starts to "jiggle" and hit the "minus" sign on the top corner. That will stop an app from running in the background.

I have seen this rapid battery drainage now on every type of iOS device from an iPhone 3G up thru an iPad 2. No matter what software version is running. I have found some interesting things along the way and hope someone smarter than I can provide a more permanent solution.

In our case (I have seen hundreds of people online with the same issue), the batteries will drain in just a few hours due to constant polling of the Exchange server. We use Exchange server 2003, but I have seen others online state that 2007 does the same thing. It appears to be related to bad Calendar invitations from the Exchange server. Some others suggest that Microsoft Exchange and iOS handle All Day events differently and that causes the iOS device to go into a loop of sorts trying to resolve the issue with the Exchange server. The device will get very warm during this as well. The last time this happened to my iPhone 4, I contacted our IT and they confirmed in the logs that my phone was constantly pinging the Exchange server. The only way I can get it to stop is to do the following:

1) Delete the Exchange account from the iOS device

2) Reboot the device

3) Access the Email application so it registers the Exchange account as being gone

4) Add the Exchange account back to the device

5) Battery life returns back to normal

This works every time. I have done this on my devices as well as coworkers for the past year while waiting for a permanent fix. I have tried many other things such as powering down the device, quitting all running apps, turning off push, etc. None of these will resolve it. The steps above work fine to treat the immediate issue of battery drainage, but I am really hoping someone with more knowledge of Exchange server can figure out a setting on the server or raise this up to Apple to be addressed in a future update. It gets really old resetting Exchange accounts on our devices several times a month.