rapid battery drain after upgrading to iOS 5

Thanks for creating this post as I was pulling my hair out as my iPhone 3GS battery was draining very fast after putting iOS 5. I had 100% and after 6 hours on standby it dropped to 37%, I was pretty shocked as the phone was on standby. I decided to follow the advice that was suggested and it didn't wrk, I decided to turn the push off the mail for iCloud and the battery did not drain as much as before. Any further advice would be grateful....

FINALLY! I found that my email addresses that i wasn't using got turned on automaticaly when i did the upgrade so i turned them off rebooted and my battery seems to be back to normal!

Thanks HDCrazy!

Hey everybody!

Try to find HD's posts. He found a solution to my problem. It was in the emails and calenders turned on automaticly by the upgrade.

Thanks to hdcrazy im back to normal battery consumption so far.

iOS 5 is such a big upgrade our iPhone batteries can't handle it. I noticed that when you compare all of the phones across the board in the store the iPhone 4s which comes with ios 5 already hass 200 hrs of battery life on standby and the other ones all have 300 hrs on standby.

So my battery on my iPhone 4 *seems* to be better after a restore and setting it up as a new phone (complete PIA). I lost 3 % (down to 97%) overnight, this morning I got up and checked the weather and updated some apps. I lost a 5% (down to 92 %) over 45 minutes so I am not sure what is going on BUT it is dropping far less rapidly. I have kept location-based reminders on because I refuse to believe they would release something that would drain a battery that quickly and advertise it as a feature. I do have one acive synch exchange account (work) so maybe that is the issue. If it is an active snch issue, then it needs to get fixed quickly, I don't use those accounts for fun but for work.

This is the first time I've ever had issues with an OS upgrade, I always thought people were crazy and doing something obvious but now I am part of this.

Apple please acknowledge what is going on and at least say you're working on a fix!

I noticed the severe battery drain on my 4 also. I read through all of these suggestions and did two of them.

It had automatically enabled syncing my Yahoo Calendar and Notes, which I dont use so I turned those off.

I also turned off the Auto-Diagnostic Reporting.

In just the two hours since I did those, I've only seen a 6% drop in battery life.

Thanks for all the great ideas!

What do you mean with a hard reset?

Reset data an return to factory defaults? or just reboot?

Regards,

Oscar.

Tried all the suggestions. Nothing seems to be working here, this seems to be pretty random

Finally found the calendar, reminders, notes settings and turned them off for my Yahoo accounts, instant CPU slow down and the major battery drain seems to have completely halted. This is with all the bells an whistles now turned on BTW.

As an aside I also upgraded an iPad 1 to IOS5 and have had no problems with that at all. On checking the same account settings on the iPad I found that they were actually all turned off after the upgrade, this might be why some devices are having trouble and others aren't (slightly different versions of the installer on Apple's servers?) Also why Restoring to a fresh start would work.

Anyway thanks HDCrazy I am really most grateful for your help!!!!!!

HD's and Danny's solution worked for me! I turned off everything for iCloud, performed a hard reset (Off & Home Button), and then turned back on the iCloud features. After 5 hours and moderate phone, text, and Internet use I'm only at 80%. When in standby, there is no drain. Thanks!

I'm glad to be able to share my findings and help others with this extremely frustrating situation.

Like I said in a past post this iOS update has many features and you might want to optimize them to get the most out of your battery. Adjust notifications, email fetch instead of Push, disable search options in spotlight, adjust location options for apps, etc....

I was experiencing rapid battery drain on my iPhone 4 after installing the GM and have systematically checked each suggestion in this thread so far.

In my experience, switching off automatic sending of Diagnostics and Usage Data resolved the battery drain issue. A hard reset was not necessary.

i did everything above and turned off location based and icloud and my phone battery still went down even in standby...my phone was off this morning...this is not good.. is this a fault with the iOS5 or my phone?

I had similar battery drain problem in IOS 4.3.5. Checked out through netstat that push.apple.com was a big drainer. After resetting network under setting, this problem went away.

In IOS 5 problem re-appeared. Even after resetting network settings, connections to push.apple.com will appear the moment I connect to wifi.

Not sure how to stop socket connections to push.apple.com

Any ideas?

Try HDCrazys suggestion, look into your email accounts settings menu, Apple have added some new settings there (calendars, reminders and notes) that seem to come as "ON" in some installs of the new IOS5, and since they are not intended for email accounts like yahoo which have no calendars etc. they are constantly trying to connect to something that does not exist thus draining the battery pretty quick. Just turn the settings to "OFF" for calendars, reminders and notes on any account other than iCloud and the problem is solved (well it was for me at any rate).