rapid battery drain after upgrading to iOS 5

I'm having the same problem with rapid battery drain -- but I haven't even set up iCloud yet, so that can't be the cause of it.

This morning when I left for work, the battery was at 100%, as it always is (I always let it charge overnight and disconnect it from the power just as I'm leaving for work.). Prior to upgrading to iOS 5 last night, I would typically have 25-40% of the battery charge left at bedtime, depending on exact usage on any given day. Today, I was down to 18% by 2:30 PM.

So after turning off a lot of the apps which were turned on in location settings and doing a hard reset it does seem to be better, although still not great. Was at 100% 6 hours ago, now down to 75% - have looked at facebook a couple of times during that time and answered two texts.

similar issue here: since update to iOS 5, batery drain is ~ 25% per hour. I've turned off most of the bells and whistles, power drain continues. no downloads are happening, i've even turned off cellular data , icloud, bluetooth, all location services, you name it... still the battery drains away.. looking for a solution...

Having the same issue! I haven't set up icloud, turned off as many notifications i can and i have'nt downloaded anything new. As a matter of fact, i've deleted several apps that i've never used. Just trying to figure out what the drain is pertaining to!

I upgraded to iOS last night and I'm experiencing incredible battery drain. While idle the phone drains over 20% an hour and in use it seems to drain 1-2% a minute. I've charged my phone 3 times today! This is ridiculous! How can I fix this?

I have experienced the same issues. I turned off a lot of unnecessary things but the phone still felt warm. I finally did a hard reset, which may or may not have done a whole lot since my battery was almost dead anyway.

I also turned off the apple diagnostic and usage which was buried in system settings I believe (not just the location services). The last thing I've done is reset the network settings. Seems to be a lot better, but if that fails I'll probably try and wipe the device and manually put things back on it.

Same here with my black iPhone 4 32GB.

I hope someone will found out what causes this or apple will fix it.

Wiping the phone and set up everything new can't be the best solution! 😟

Mine is loads better today (3GS) after doing hard reset and turning off a lot of the apps which were turned on on location services.

I'm glad it's not just me! Fed up of the "You are probably using your phone more" 10% in 30 minutes in my pocket! I got better life playing 3D games! Over 200 new features, 1 of which is to kill you battery! Get my 4S tomorrow, hope it's better then this!

*Edit - Forgot to mention, I have done hard restart and full erase and set up as new phone. I have tured off all the hidden system location things, eg "Setting time Zone" "Diagnostics & Usage" etc, still poop!

Going to try HD's thing 🙂

Message was edited by: deavo

I just found this discussion here: https://discussions.apple.com/thread/2669328?start=0&tstart=0

I used iStat and saw the process'ReportCrash' occur very often. The discussion was mentioning problem with Active Sync Exchange account so I deactivated my Active Sync mail account. So far the 'ReportCrash' process isn't occuring anymore... I'll see whether this fixes the battery issue...

AS usuall,

Nobody from Apple taking care about any drain battery related issue. Simply mediocre.

Regards.

So far I can say that the rapid draining of the battery is gone! So look out for Exchange Active Sync accounts!