iphone battery dead after ios 5 update

If it hasn't already been posted.

Resetting network settings worked for me. my battery life is now back too normal.

Yup looks like I'm in the same boat. My battery loses 25% of its charge per hour. Have taken it in to the apple store twice, spent lots of time with the genius bar folks and others; they're stumped. The phone will go from 100% to below 10% in just 4 hours -- basically rendering it almost useless unless I'm going to stay house-bound and with my phone plugged in 24/7.

So far I've tried disabling all of iCloud except "Find My iPhone" (a feature which I had with iOS4.x), turned off localization services for most apps, deleted all of my e-mail accounts (which were on "manual" anyway, and without push notification), reset the phone (not a factory reset -- at least not yet -- but the "hold the power and home buttons down for 10 seconds" reset), let the battery drain, etc. Nothing has helped. The apple store folks can see the battery draining right in front of their eyes -- within 5 minutes of walking in the door today it had gone from 100% to 95% and by the time I left the store it was below 80%.

I'm just 5 days past the warranty expiration date. They told me to come back again tomorrow if the latest tweeks still didn't help.

I upgraded to ios5 last night and I noticed that my battery only last about 5 hours from full charge. Anyone know what to do?

Somebody mentioned removing the Mobile Me account from the phone as it was in conflict with iCloud somehow. I did that and that seemed to work. I need to finish the migration to iCloud and then hopfully this will be overwith.

This seemed to have done it for me - so far

Same problem here... fix please soon!

An update:

I shut off all iCloud stuff. Charged overnight, been running since 8:00am and now down only to 62% at 7:30pm (it was 20% same period yesterday). I reported before that when I enabled iCloud I had used 2.6GB of 5GB. That's a lot of data transferred and probably the reason for the drain last time.

I will try enabling iCloud tonight during charging and watch tomorrow checking first the iCloud use then at the end of the day, any changes to that and battery drain.

The MobileMe solution won't work for those of us who have never been using MobileMe.

I've seen *some* improvement since shutting off all iCloud features (except for "Find My iPhone" which I have had for months) -- it has now taken 4 hours to go from 100% to 30% which is much better than it was (yesterday it was dying completely in only a little more than that), but the battery is still draining faster than it was with iOS4.x.

Are you monitoring your Usage and Standby times under Settings -> General -> Usage?

Also do you see unusually high data activity over a 3G connection? This can monitored at the bottom of the same screen. A messed up email account (typically MS Exchange) or crashed/runaway app (that didn't shutdown or sleep in the background) are the most likely causes.

Done everything, and it doesn't seem to be draining AS quickly..but still faster than usual. Check this little blurb about the battery from way back in July:

http://www.karthikk.net/2011/07/how-to-save-battery-life-on-ios-5/

It really ticks me off that we have to turn off all the new features (after a three hour download and restoration, HELLO) just to have a functioning phone. Not cool at all.

Hi!

I've had the same problem after updating to iOS 5.. my battery was just totaly diying. I've done some checks, and running a CPU meter app, the CPU load on my phone was constantly between 40%-70%, even when I closed every program in the background.

Now I started to turn of features, one by one in settings while watching the CPU meter, and finaly I found the CPU hog problem. For some reason the "Safari Bookmarks" sync in "iCloud" was using all the CPU power.. (No idea...)

I've turned it off and on just to make sure, and the same happens. When it's on the CPU load goes up to 50-70%, even when I leave it for a while to make sure it has synced all the data it needs to sync.

Don't know if this goes for all you out there having the batteri drain problem on 3Gs after updating to iOS5 but I hope this can help some of you out there.

Hi.

Same problem for me, i tried all the tips (network settings and email accounts reset) but nope.

The iphone 4 gets warm and it seems that there is a zombie process that takes 100% cpu.

Any comment from apple?

Thank you

Denis

How can I reset my network settings? Please help.

Ferruh, go to settings > general > reset (scroll to the bottom to find this) >Reset network settings. The phone will restart but was fine when I did this.

I also tried turning off cellular data altogether and moitoring the CPU usage. Oddly after a while when I turned cellular data back on, the battery doesn't seem to run down so fast any more. Maybe switching cellular data off and on also resets something.

Good luck

Hi I have an iPhone 4 and since putting iOS 5 on it the battery life has been really bad it drops at a ridiculous rate even when I'm not using it where as it would barely drop any charge when it was in standby. I've tried turning lots of thing off but it makes no difference. I've been looking around and alot of people seem to be reporting this.