rapid battery drain after upgrading to iOS 5

Just an FYI, IM+ Pro is a huge consumer of battery power if its icon exists on the multitasking bar even if set to offline. I fully charged my iPhone 4 on iOS5 to 100%, after 30 minutes it went down to 93% with no usage and my phone was warm. I killed the IM+ Pro icon on the multitasking bar and my phone stayed at 93% for over an hour and I could feel my phone cooling off. I have submitted a ticket with Shape Services so hopefully there will be a fix soon. They have a whole forum about this known issue, especially for the Blackberries and Androids, but not really much on the iPhones.

Turn Bright ness to 1fourth of the batery!

Mine appears to be fixed. I deleted the iCloud account and re-added it... After that, no battery drain. I unplugged from the charger at 6pm and at 5am, my battery is at 86%. Perviously, I would to go bed with 100% and wake up with a dead iPhone.

By chance did you reset your network settings as recommended here? I did last nite and have had the phone unplugged for 2 hrs now and its still at 100% Fingers crossed.

As I recall same problem with the 3GS phone.

Alas, this seemed to help me as well.

My battery started draining noticeably fast after my iOS 5 upgrade (was losing 30% just on standby overnight with no apps 'open', no bluetooth, no notifications, no location services - on wifi). I tried recalibration, hard resets, turning functionality off - to no avail. My iPad did not have any noticeable battery drain after ios5 upgrade.

Finally after attempting the steps in your post (deleting and re-adding the MoMe / iCloud account), the battery finally appears to be back to normal 24 hours later. I only lost 2% on standby thru the night and standard usage is also now acceptable.

I did not reset my network settings... that was next on my list... :-) I recall a battery drain issue to maybe iOS3? I didn't get the 3GS, kept the 3 until the 4 came out... I'm also waiting for the 5.

I did all of the above and none of it helped me.

I did a reset from new and backed up from a old one and no chance.

I refuse to wipe everything out and start over as i will lose my texts which I do not want to lose.

any other options? I do not use mobile me so that cannot be the issue. I have turned off a lot of the things people told me to turn off. This am I lost 7% in about 15 min doing nothing......

It´s icloud on the Idevices that drain your battery. Try to remove icloud account and you will immediately see the different.

I had same problem and when i delete the icloud account on the iphone the battery became normal again.

Hope it will help you like it did for me.

I didn't have mobile me or iCloud turned on before or after....still the problem

I've been having really bad standby performance on my new iPhone 4S, and resetting all settings and turning off location services and iCloud didn't seem to help. I ran a program called wireshark to try to find what network access was happening, and it looks like the iPhone 4S is communicating with a process called 'usbmuxd' on my Macbook, even when the iPhone is put to sleep, and even though I have turned off wifi syncing. I tried rebooting my Macbook to no affect; next I will try blocking the communication with a firewall and see if that helps.

Check the stock ticker app.

I unsubscribed to the stocks that got subscribed to in the instal, now my battery life is back

Quick update: It's now 36 hours since I applied HDCrazy's fix and fully recharged my battery. Aside from a period of eight hours where the phone was in Airplane mode (light sleeper!) I'm currently holding a charge of 62% despite making a couple of phone calls, sending and receiving numerous email messages, a few text message conversations and a little web browsing on Safari. Worth noting is that I've been connected via Wi-Fi all day and haven't needed to connect via 3G; all my settings are now back to where they were before the iOS5 update.

Here's where it gets weird!

After deleting my mobileme account (no iCloud, Exchange, Google, Yahoo accounts on this phone), resetting Network Settings and going through a hard re-set, the battery performance is now better than it was when I got the phone 18 months ago! I'm not joking.

Before the disaterous update to iOS5, I could expect to get 18 hours of normal use out of my 3GS before needing to recharge. This all seems to have changed...and for the better, I might add. Obviously I'll need to fully discharge the phone on a few more occasions to see if this inproved performance is maintained.

However, has anyone else experienced improved battery performance after a successful fix?

I have a theory that longstanding iPhone users are experiencing more drastic battery drainage issues than relatively new iPhone owners. If that's the case, then I think I know what might be causing the extreme drainage...to be clear, this isn't about how new your iPhone is; it's about how long you have been an iPhone user.

If only we could set up a survey on this thread: I think we could have this issue nailed in no time at all.

Michael

Think I've sorted it by deleting iCloud (although it wasn't even enabled or in use) and readded it.

This seems to have sorted it

Since I got the major battery haemorrhage fixed thanks to HDCrazy, I have definitely seen appreciably better battery life than before the IOS5 update. I'm only down to 50% (from a full discharge followed by a full 100% charge) after two days of fairly normal usage (some moderate browsing, couple of calls, some e-mails etc) , definitely an improvement.

BTW Michael my phone is a 3GS and I've been using it for around a year now.

Update -:

I did everything that was advised above and it made no difference to my battery life, I have the iPhone 3GS and decided to turn off location based, notifications, 3G and even the wi-fi and left my phone over night and the battery still dropped very quickly after a full charge. I decided to do a restore and setup as a new iPhone and I used the iCloud to retrieve my contacts. After doing this, I noticed a big difference to the battery life and is lasting for the whole day and that's with making phone calls, text, browsing and using the apps. I reckon the backup I used from the precious OS Was trying to connect and causing the battery to drop and causing the phone to heat up.

Anyone having battery issues, I urge you to try setting up your iPhone as a new iPhone.