Battery drain since upgrading to 2.2

Thanks Jason,

Strangely enough the shutdown issue has been solved. My Apps Store icon has had a # (apps installed) beside it for quite some time. Tonight I went into the application with the Wifi turned off and it said 'Loading' for quite some time (obviously), so I held down the Home button and it finally went back to the Main screen. The # over the Apps icon is now gone and I'm able to shutdown the phone again. A restore would also have resolved this problem too I imagine. I'll see what this does for my battery, although starting fresh may be best.

I also noticed the Safari issue before reading this thread.

For me it is really happening: Each time my iphone gets warm, I just have to open / hard close Safari and everything goes back to normal.

I started suffering from this problem after I upgraded to OS 2.2.1 a couple of months ago, and now it's making me crazy.

Every couple of weeks, I will experience greatly reduced battery life. Under normal conditions, I get more than a day of battery life. When this bug hits, battery drains in less than a day. I take the phone off the charger at 6am or so, and by 8pm or so I'm getting low batter warnings. That's about half of what I expect under normal conditions.

I can't correlate onset to a specific event or set of actions. This has happened to me 3 or 4 times. The first few times, I thought I was able to fix it by following instructions posted here - delete/re-add my Exchange account. This time, I've tried a number of things but the issue persists. I'm on day 3 of reduced batter life, and I can't figure out how to fix it. I've tried resets (holding sleep button + home button), deleting Exchange account, killing email, Safari and phone by holding down Home button, turning off location services, setting email to manual, and nothing appears to work this time.

One thing I note is that when the bug is active, Settings reports that usage time = standby time, or they will be very close to equal, even though the phone is in my pocket on standby most of the time. Sample screenshot of settings at http://www.flickr.com/photos/jlscott3/3534049948/. That's from the last time this happened to me. On the current go-around, I've got an 18-19 minute gap between usage and standby.

Man, I hope 3.0 fixes this. It's seriously annoying.

JLS

Update - I tried switching various options on and off while I was experiencing the problem, and the only one that had any effect was putting the phone into Airplane Mode. Then, the usage time stopped counting up 1-for-1 with standby time. Turning off 3G and/or WiFi individually did not have that effect. So, it seems that something is creating a network connection and not giving it up.

Sometime Saturday, the problem resolved spontaneously. I pulled the phone out of my pocket, it wasn't warm to the touch! I checked the usage stats and Usage was a few hours less than Standby. The only thing distinctly different about Saturday was that I was outside my usual area, so I was using a different part of ATT's network than I usually do.

I still don't know what's going on with this. When it happens again, I guess I'll try deleting my Gmail account, since I didn't try that this time. For sure the problem appears to be related to background network usage, and that limits the suspects to a handful of apps, email being foremost in my mind.

JLS

I had this problem too. I got a new iphone at the Apple Store near me, and from now on, when I fully charge my phone at night, I then do a hard shut down, meaning I hold the top button and the home button down, wait about 1 minute, and restart the phone. I then go to sleep, with the phone in standby mode, and I have not had a battery drain issue since. I have used this method for about 1 month now, with great results. I think some apps were running in the back round, and when I do a hard re set after fully charging the unit, well, it seems to do the trick.

Good luck!

cazzie r