melissa162 wrote:
I disagree. This is my first iPhone. I did not migrate from another device. At this moment, since last full charge, my usage is 40 minutes and my standby is 1 hour 12 minutes. My battery is at 83%. I can't get through a morning with this phone.
It does not necessarily matter if you upraded or not. Corrupt system level settings created by an iOS 5 bug in the original release that caused battery recalibration issues, etc. Just installing the update does not fix the issue in most cases. You need to clear out those settings and recalibate the battery. Follow the procedure below in order. It does fix the problem in most cases.
Go through these steps to address the battery after updating to iOS 5.0.1:
1. Reset all settings (settings app-> general-> reset)
2. Go through initial setup steps (lang, wifi, siri, enable location, etc) and choose setup as new phone (don't worry your apps, data, contacts, mail will still be there). Do NOT restore from iCloud or iTunes (It can copy back corrupt settings)
3. Turn off system location services timezone and iAd
4. Fully discharge battery (tilll it shuts off with the spinning wheel)
5. Fully recharge battery (overnight if possible)
In my experience this improves the Standby battery drain issue significantly in most cases. It reduces drain from 2-4% or more per hr to 0.5% or less. It has worked for many, many users now. If it does not work after a few try's you may have a real battery or hardware issue and should contact Apple. Good Luck!
More details on my thread here if needed: https://discussions.apple.com/thread/3484755?start=0&tstart=0