For some of us Exchange isn't the issue, I don't use it.
I had my phone updated by Genius and it still drained afterwards. I have crippled my phone and it still drains. Hopefully an update will come that will correct whatever is draining the battery.
I think many people would be happy to just be told that "yes, Apple is aware that some people are experiencing extreme battery drain and we are looking into the issue."
It is crazy to jump through all of the suggestions on this post and others. There are enough of us who have seen this, who have gone to the Apple Store and have been told yes, something is wrong. Where are the replies from the Appl techs with some real answers? (I haven't read through all 136 pages yet)
Being told to upgrade the phone to a new one to correct the issue is unacceptable
Having to jump thorough hoops 'trying' to find the magic bullet that corrects the issue is crazy.
Hey Apple, swap my phone out and test mine and trouble shoot it, you will see there is an issue.
Upgrades have glitches - that is understood by us. Things happen. But, acknowledge the issue and let us know you are working on it. Don't force me to buy the competitors phone. I like yours, that is why I bought it.
What about letting us do a backout? Is it really that bad to let us stay on an older OS?
I for one am tired of charging my phone everywhere I am and I am not even using it. My phone always has a charger attached to it, so much for portable...