IOS 4.3.3 battery life has been significantly reduced

Ironically when I called Apple the support analyst told me to switch off push email & that seems to have improved things. It's so obvious she knew this was a problem! So I've switched off a feature that worked well for 18 months on the same phone until 4.3.3. If I tried to treat my school customers with this contempt I'd lose then all. Just admit their is a problem and tell us to turn off push and be done with it.

Incidentally I recently changed my exchange password, wonder if it's trying an old password first and looping and continually checking for mail or something like that.

Shutting down and keeping your i-device entirely off also works! 😝

I don't think the problem is related to IOS 4.3.3 (or at least not exclusive to it).

My partner and I changed our phones from BlackBerry Storms to iPhone 4s (Verizon) last Sunday May 15, 2011. We both bought black 16gb models. Oddly enough when we sync'd with iTunes the next day, the version of IOS went from 4.2.6 to 4.2.8 -- apparenty 4.3.X isn't available for the Verizon iPhone 4!

We configured our iPhones virtually identically: both use Push to retrieve email, contacts and calendars from our Exchange 2003 server; both use MobileMe's iPhone Finder service; both have Bluetooth head sets (albeit different manufacturers and models); both have wi-fi connection at home and at work; neither use Ping.

My phone consumes a little more then 1% of battery per hour while his consumed about 18% per hour with similar usage. His got hot while mine does not.

He exchanged his phone for a new one last night (Wednesday May 18, 2011), restored from a backup and was seeing the same kind of battery drainage with the new phone! To be precise, it had the same kind of battery drainage BEFORE it was restored from the backup, although the items above had all been turned on.

We have since used iTunes to restore the factory software on his replacement phone but have NOT: done a restore of the backup; turned on bluetooth; setup email; or changed any of the default settings except turning on the battery percentage indicator. It has been 1 little more then 1 hour since then and the battery has decreased only 1%.

We're going to leave it in its current state for the rest of the evening, charge it to full power overnight and then try turning on the email, bluetooth etc and eventually restore the backup tomorrow.

There was one thing that was done differently when we connected our phones to iTunes: I set up my phone as a new phone but he restored from an old iPhone 3 backup. I don't know if that's significant -- it would seem that the replacement phone shouldn't have been affected by that issue unless something in the iPhone 3 backup carried through to the backup that was used to restore settings to the replacement phone.

I'll post an update tommorrow...

I just bought iPhone 4 from Apple Store Canada and I restored to 4.3.3. My battery is draining significantly ⚠ in just few hours it went from 100% to 75% with no or very little usage. 😟 After restore i did a restore from backup, i will try to set it up as a new phone.

The reset has worked for my wife's phone (3GS)

I don't seem to have an issue (3GS) nor my daughter (4)

Restoring as new phone worked for me.

The battery now is great. On 4.3.3 it drained at a rate of 10% per hour on standby with almost everything turned off. Now with everything turned on, it only uses 1% per hour. Sometimes even less. I recommend restoring to 4.1. I'm happy to have my phone back!!

Your problem is that is it jailbroken..... David.

How did you restore your IOS to a previous version?

For me, the problem was caused by the following setting:

Enable 3G: ON

Celullar data: OFF

This setting drains battery at the rate of more than 10% per hour.

The solution for me (I use only Wifi for data connection) is the following:

Enable 3G: OFF

Celullar data: OFF

With this, the battery usage is back to NORMAL at 1% drop per hour, even with Wifi on, notification on, and location services on. 🙂

It seems like a software bug to me, because, technically, disabling celullar should disable 3G.

Heres an update from me.

3G makes an enormous impact on battery life. The reason the first iphone had no 3G was because at that point Apple hadnt managed to design a battery that could deal with it. If you leave 3G on on your iphone 4 it will drain the battery in less than a day. As people on this thread are reporting. With 3G off battery life is much more manageable.

As a new iphone user I didn't realise this, and I am going to try and only use 3G when I have no alternative.

My iPhone4 (no Jailbreak) before the upgrade was great, after the upgrade from 4.3.2 to 4.3.3 the battery drain was horrible.

No setting change in between, I fully charged the phone in the morning and it will be 20% remaining at 5pm with minimum usage. Totally different from my previous experience.

after reading this forum, I tried.

1. Hard Rest by holding power and round button. -> didn't fix the issue

2. Turn of push mail -> didn't fix it

3. turn of WiFi -> didn't fix it.

I did not turn off location service as I need it.

I also saw people said about restoring as a new phone fixes it but it is not an option for me as I have many pictures and SMS in the phone I wanted to keep. No way I can restore as new.

I think Apple should seriously think about getting their new OS tested properly before they release an update.

How can every second update from Apple has serious bugs? be it alarm, battery or WiFi, they are crucial components, they cannot be wrong! I don't care if the compass has bugs but not critical components! I wonder how they do testings and how many people involved in their testing.

I love my iPhone, I love how the OS is working but I also use the phone for work, when issues like "Battery Drain" like this, it will impact my work and I would hate to switch to other Phones!!!

Apple, please, fix this quick before I go and force myself to get an Android phone.

I've fixed my iphone battery issue after updating to iOS4.3.3 by doing the following;

1. Backup to itunes

2. allow battery to run down completely by running photo slide show on full brightness.

3. Make sure iPhone battery runs to empty

4. Recharged battery from mains for approx 14hrs.

As you will see I have 82% left in about 10 hrs where previously I would be down to about 35%.

I hope this works for those having an issue.

Stuart

This Workaround definitively workded with several iDevices (iPhone 4, iPhone 3GS and iPod Touch)

It solved Batterie, WiFi, 3G and GPS issues, which occurred after updating the device (also to 4.3.3)

0. Sync your Contacts and Calendar to anything compatible to iDevice (smth different than iTunes, Outlook, Google or smth else)

1. Restore your device in iTunes, but don't activate it (that iTunes doesn't apply any changes to it) just disconnect your device when iTunes claims about SIM-Card

2. Uninstall iTunes completely (preserve your iTunes Media Library)

3. Add a new Admin user to your OS

4. Login as new Admin user (you created in step 3)

5. Install iTunes

6. Set your device to DFU mode (- Power off device, - press Power button for 3 sec, - press home button for 10 sec still holding Power button, - release Power button continuing holding home button, - release home button after 20 sec).

7. Connect your device to PC/MAC

8. Wait for iTunes starting or start it manually

9. Restore your device in iTunes (let iTunes to download the FW again, don't use old file, just to be sure)

10. Activate your iDevice

11. nJoy!

PS.: I didn't try to restore my Phone from old backup after this procedure. I don't know if your device then will still work fine. You may whant to do so, then you can post here if the old issues'll come back (I suspect they will). But you can still use your old iTunes Media Library and restore your Contacts and Calendar from where your synchronized it in step 0.

All iDevices I restored this way, work with newest FWs already for more than a week without any issues.

New info from the Genius Bar we got yesterday about the battery drain for 4.3.3.

Since the iPhone is now capable of running multiple apps, once you start an app and stop it...it keeps running at a reduced rate to start up faster the next time. I had 18 apps running when the Genius scanned my phone for issues.

To kill the app all together, double tap home button and your running apps are listed at the bottom. Hold one of the apps (like you are going to remove or re-arrange them) till it "wiggles". Tap the " - " to kill the app. Also, killing phone, text or contacts does not affect the operation IE, you will still receive calls, texts...etc...

That's the word we got. Oh, and hard reset does nothing to resolve the battery drain issue.

Killing background apps doesn't resolve batterie issue. those background apps were never a problem before and aren't yet.