iOS 5.1.1 have batery loss

iOS Update 5.1.1 brought to you by Mophie.

Another thing I noticed before I fixed my iPhone 4s was that some apps were acting strange. If some apps aren't working properly delete them and add them after the reset. My phones battery is better than ever it ***** to hear that some people can't fix the problem.

this os just disappoint me so much.

i went to sleep and wake up 7 hours later, the battery life dropped from 100% -> 73% without me opening or doing anything with it! i just wanna get a downgrade now 😟

-3GS

I have solved my battery problem I was going to bin my phone!!! I factory reset it then drained the battery completely. I charged it to 100% and left it a further two hours on charge, make sure your phone is switched off when you charge it!!! I then repeated the drain recharge procedure twice more and gradually it massively improved the battery I have only used 21% in the past 11 hours 6 of which on standby!! I will drain and charge again later one last time then hopefully it's cured

I too am seeing a significant drop in battery life while on standby. The only,change has bee adding 5.1.1

I suggest reading the thread you posted to for some insight.

Letting the battery die did nothng for me, but doing a restore seems to have helped.

Please keep in mind that all of this troubleshooting took place after a fresh (DFU) install of 5.1.1 and simply enabling my exchange account. My battery life has plummeted from about 20+ hours to less then 5.

After looking at a number of posts, and discussions, and taking it to the apple store, I've narrowed mine down to iOS 5.1.1 hitting our corporate exchange server constantly. See the attached image to see the number of times my iPhone has communicated with our corporate exchange servers. Before I updated to iOS 5.1.1 my phone would communicate about 100~150 times per hour, after the update, on a cellular connection, it would hit it up about 3000-7000 times per hour, when I was on WiFi, it would spike up to 16000 times per hour.

/___sbsstatic___/migration-images/183/18383976-1.png

The time over the weekend where there wasnt any traffic, I disabled my exchange e-mail to save my battery. I've since disabled push e-mail per another thread to see if this alliviates the issues, but this is not an acceptable solution.

--Joe

This problem is not unique to 5.1.1; it has shown itself with every version of iOS since Exchange support was added over 4 years ago. It doesn't always happen when upgrading; it can happen at any time. The solution is to delete the Exchange account, reboot the phone, then add it back. (The reboot step is essential). A slightly less drastic alternative that usually works is to go to Settings/Mail,Contacts, Calendar and turn off the 3 switches for the account. Next launch Mail, then Contacts, then Calendar to clear the queues. Reboot, and turn the switches back on. Wait until the account resyncs before checking for success.

The cause appears to be the ActiveSync protocol creating a new connection to the Exchange server when an existing connection is interrupted while transferring data (such as might happen if the connection was active when updating), but continuing to try on the old connection (which is now being ignored by the Exchange server).

Please keep in mind that all of this troubleshooting took place after a fresh (DFU) install of 5.1.1 and simply enabling my exchange account.

I completly wiped my phone multiple times, one time was a re-install of the os from my pc, without any restore, then just adding my exchange account back. I then took it to the apple store and had them do a DFU wipe/re-install and added only my exchange account, both times my battery life is about 5 hours on a 100% charge.

I too have the same exact issue...seems it started since I updated to 5.1.1...will try to restore as new and if it cures as some claims on here...annoying

I also hit the rapid battery discharge on my Iphone 4s following the update to IOS 5.1.1.

After trying shuting down location services and wifi nothing changed. I was still seeing the rapid battery discharge. I did a reset of network services which did nothing to stop the discharge. I then reset the entire phone and restored from backup at which time a new copy of 5.1.1. was downloaded and installed. Still had the battery discharge.

I then removed my Exchange 2003 Sync account and restarted the phone and also reset all settings. Finally this stopped the battery discharge. Then I waited for the battery to recharge and I power cycled the phone. Then I added back the Exchange 2003 account and battery discharge started back up immediately, so I remove the account again to get the battery discharge stopped.

So this phone has a sure issue with 5.1.1 and connecting to exchange 2003 via activesync. And I cannot get the email I need now...

I installed iOS 5.1.1 on my new iPad over the weekend. The first night the battery drained completely overnight. I thought that was strange so I charged it completely the next day. I unplugged it from the charger that night and in the morning the battery had drained over 30% with no apps running. I have tried this every night since and it is consistent. With OS 5.1 it would lose about 2% overnight.

What's up?

BTW - the reason I upgraded to iOS 5.1.1 was because my 4G (AT&T) connection kept dropping. I was told by the Apple store that 5.1.1 had fixed this problem and I should upgrade. The 4G connection problem has not gone away, although it is less frequent.

After some additional testing it seemed that there is an issue with the calendar syncing. Try turning off the calendar sync and see if it works. Also, is everyone with issues running exchange 2003?