Culprit discovered! As stated in my post yesterday, I’ve been messing with this problem since the 29th of April. For me it might be more of a 4.3.2 issue because it began before the release of 4.3.3 but continues with the new release. I don’t connect my iPhone to my PC all that often – pretty much only when I have pictures that I’ve taken with the phone and want to save or have purchased a new CD that I want on the phone. So while, I cannot say for sure when I updated to 4.3.2, it may well have been about the time my troubles started. As a side note, my wife is having no problems but is still running 4.3 (8F190) on her 3GS.
So I decided to start absolutely fresh late yesterday afternoon – I’m certain this wasn’t necessary but desperate times call for desperate measures. Did a complete uninstall of iTunes and downloaded a fresh copy of iTunes for Win 7 64-bit. Installed the package and attached my iPhone to the computer. Selected restore and when this was done, selected new phone. Un-ticked all the Outlook stuff as well as the sync apps radio button. When completed, I had absolutely nothing but the stock apps on the phone. I then unattached the phone from the computer connection and did nothing with the phone for one hour. Checked settings; usage 1 minute, standby 1 hour. Added my MS Exchange account onto the phone and turned mail, contacts and calendar off. Waited another hour and checked again; battery at 99%, usage at 2 minutes, standby 2 hours. Turned mail on (with push) and went through the same process and all was still well and hour later. I turned contacts on; everything still as it should be an hour later. Turned calendar on and the battery percentage began dropping. Checked usage settings and usage and standby minutes stayed in sync – that is each additional minute of standby reflected a new minute of usage. An hour later, the batter was down 12% and usage was 64 minutes. Turned calendar off and the battery stopped its drain and usage minutes stayed pretty much the same.
Have to be honest, I don’t get it. Push enabled mail – and I get a lot of mail – doesn’t seem to be impacting battery life. Nor do the BT and Wi-Fi. What in the calendar part of Exchange would cause usage to stay live? It just doesn’t make sense to me. Guess I can live without the calendar – the phone would be worthless without mail and contacts – but it sure would be nice to have what I had before.