iPhone 4 - ios 4.3 - Battery Drain

But you do have Exchange, which is inherently a Push account whether you have it turned on or not. It is Exchange Activesync that causes the problem, and your solution, which worked, resolved it.

.... and just to complete, also make sure you use LOCATION SERVICES only when needed (Setting -> Location Services [iphone 4.3.3])

Location Services only uses power when an app that uses it is running, and you can tell when it is because there's an additional icon on the top bar. So there's no need to turn it off if you aren't using any apps that use it (and that icon is not showing). Also, if you turn it off "find my iPhone" won't work.

There are several "small" things that can save a "little" amount of battery power, but not enough to notice. If you have a problem with battery life something is wrong, and tweaking little things (location services, bluetooth, WiFi, 3G,screen brightness, volume) is not going to fix it. WiFi is off whenever the screen is asleep (and only consumes 10-30 milliwatts anyway), bluetooth is only 3 milliwatts (compared to up to 600 milliwatts for cellular data),

The two power consumers that dwarf everything else are CPU when playing interactive games or intensive background apps, and cellular data. If you have a problem it is caused by one of these two. Or both. For example, streaming music uses both heavy CPU and data, and runs in background. Apps that don't correctly handle stale connections (including the built in mail, ping, game center and store) also use both CPU and data. And turning off cellular data can make the problem worse, not better, because it prevents those apps from sending their data (but they keep trying). You will find a lot of messages posted by people who said their problem went away when they turned cellular data ON.

just as a short information. the issue with the mail accounts caused not only the extraordinary battery drain but also an additional data transfer of approx. 250MB on my bill which was not covered by my subscription. my provider 'Swisscom' charged me 20 dollar extra (actually in Swiss Francs) for this. happily enough they agreed to credit it back to my next bill when I explained them. as I have a business subscription the additional costs incurred are quite low, however, one could imagine that for other subscriptions (or roaming!!) this could easily reach an additional charge of 100 dollar or more and I guess most providers won't be as generous as mine - because it's not their fault! cheers

This worked for me, try General>Reset>Reset Network Settings. Then reboot your iPhone. Then launch the Mail app and see if there's a problem with the password to one or more of the email accounts you've added to the Mail app. If the Mail app tells you it doesn't accept one of your passwords, add the password again. If that doesn't work then read on...

Like others, my problem was the iPhone Mail app. Unlike some posters above, I didn't delete all my mail accounts from the Mail app, I couldn't face doing that with 5 email accounts. But after doing a Network reset, turning off Ping, and after closing all apps that were running, the Mail app told me that one of my accounts had the wrong password (which was incorrect, because it had been working fine until this point). So I added the correct mail password for the 'offending' account, and so far there have been no problems with my battery.

btw, my battery drained astonishingly fast today. Today was the first time I'd left home with a full battery and come home from work with an unusable iPhone with a dead battery. Since the fix above, it's full and no problems.

My guess is that the Mail app had spent the whole day trying to access the mail account it had registered with the wrong password. This constant access must have run down the battery.

If the first paragraph doesn't fix your problem, then follow the steps in the second paragraph.

I hope this helps. In any case, over 60,000 views and over 150 replies to this problem in the last few days.... Clearly Apple dropped the ball. I expect better testing on updates, frankly.

Markw00t wrote:

I hope this helps. In any case, over 60,000 views and over 150 replies to this problem in the last few days.... Clearly Apple dropped the ball. I expect better testing on updates, frankly.

It has absolutely nothing to do with the update. The identical problem has occurred with some phones with every update over the past 3 1/2 years. And 150 posts is nothing. There are 200 MILLION iOS devices in use. Even if the 150 (which represents less than a hundred users due to multiple posts) is 0.1% of people with a problem the number of iOS devices that experience the problem (i.e., 100,000) is 0.05% of iOS devices in use. Which means that the beta testing, which probably involves a couple of thousand users, is unlikely to pick it up.

As you observed, the problem is with an app (or apps), not iOS itself. This confirms what many, many others have reported over the past 3+ years in multiple threads after each update. And it also occurs totally unrelated to a specific update. My phone has exhibited the problem many times, most of them unassociated with any soecific release. And the fix, which is turning off any push mail accounts and rebooting, has fixed it every time for me. But other users have found that other apps are causing THEIR problem, not Mail. Still others have found other fixes, which means that the battery drain is a symptom of a problem, not the problem itself, and that there are many possible causes.

What would resolve this pretty quick is the ability to have some profiling app that tracks apps and their usage of wireless or cpu services. Knowing who the "hogs" are would go a long way in reducing the speculation and the black magic tricks.

Having said that i've researched for such an app but it seems the iOS API doesn't provide a correlation of apps & services. For instance, I can only know that i've consumed X amount of data on wireless services, or that i've selected X app so many times.

My 0.02$.

I agree, that would be very useful. Or something like Wireshark for iOS. There IS an app that will track your data usage vs time and location: Dataman. It runs in background, though, and shortens battery life itself.

I did check Dataman too, but you have to guess which app did the data request.

I've had the same problem - I was getting about 10 hours between charges. Went to my telco and they checked my iphone before it was to be sent away for service.

Lucky they did - it turns out that I had quite a number of apps running in the background, many of which were high drain apps like the internet and other internet based apps. You find them in the background apps area - double press the home button and all the apps that are running in the background are listed accross the bottom of the screen.

To really turn them off, press the app until it wobbles and then press the red minus. This has made a dramatic change to my battery life - I have not had to recharge for 36 hours so far and still over 50% charge. This 'feature' came in with the latest IOS upgrade, but they did not really explain too well that the apps continue to run in the background until they are turned off by this method. I thought it is like a recently used app list (which it is), not a list of still running apps.

I have told many people about this 'feature' and many have got back their batery life.

Hope this may be the solution to your troubles as well!

my iphone loss power so fast just send a meassage loss 2% from the battery can anybody help me to fix it

Yes, closing apps as Neville advises is a wise thing to try.

Also, check Usage under Settings-->General-->Usage When my iPh4 has one of its bouts of battery chow my Usage shows almost as many hours as Standby, which is not normal. That explains the excessive drain, although no apps are running. A power off reset fixes the problem.

Normally I close all apps manually every once in a while, have wi-fi and Bluetooth ON all the time and the phone uses about 10-12% of the battery charge per day. Uh, i'm running iOS 4.3.3

H

3G Internet connection eats up the battery very quickly, here are some tips to increase your iPhone's battery life:

- close all background applications when not in use.

- switch 3G off when not in use.

- switch Bluetooth off when not in use.

- in settings>mail, contacts, calenders> turn 'push' to 'off' and 'fetch' to 'manually'.

- turn off wifi when not needed.

- reduce your brightness in settings>brightness.

- in settings>general> set autolock time to 1 minute.

- in settings>iPod> turn EQ off.

- in settings>location services, disable location service for the apps you don't want tracking your location.

- do update your iOS software when new versions are available as apple adds tweaks for performance and battery life.

Closing background applications only helps for applications that use data, which is very few, and those are obvious.

3G IS off when not in use; it only uses power when sending and receiving.

Bluetooth uses so little power that turning it off will only change usage by a few minutes a day.

Push does not use any more power than Fetch or Manual unless you receive a lot of mail, then you probably want it on.

WiFi IS off whenever the phone is asleep, and you want it on when awake, so turning it off makes no sense.

Brightness only matters when using the phone, and it doesn't affect life that much. Automatic is much more convenient.

Shorter autolock is better for many reasons, not just battery. It's also safer if you lose the phone. And be sure to have a passcode.

EQ makes a small difference, but only when listening to music. And that uses very little power. I used iPod for 8 hour straight on an international flight last week with EQ on and my battery dropped from 85% to 80% in airplane mode.

Location services only uses power when the indicator is on in the title bar. But turn it off for applications you don't want tracking you. Has nothing to do with power.

Yes, update/

I've tried em and it significantly increases my battery life.