If you continue to have iPhone Battery Problems after iOS 5.0.1 update please perform the following:
- First make sure that you backup you device in iTunes with Encryption on.
- Turn off any un-necessary network services such as WiFi and Blue Tooth.
- Make sure that you are in fact running iOS 5.0.1 by checking in General>About. It should read 5.0.1 (XXX)
- Perform a "Hard Reset" on the device.
- Do a reset by selecting Selecting Settings>General>Reset.
- Setup as a new phone, all your email and APPS will still be there.
- Use the device and let the battery drain down, under 10%.
- Do a full recharge using the power adaptor. (Make sure all the connections are secure.)
If the problem persist only after doing all the steps above:
- Backup and Encrypt your device in iTunes.
- Do a factory reset on the device.
- Perform the Update on the Device.
- Perform a Restore of the Backup.
Users of first generation iPads have extensive improvement by do the following:
- Selecting Settings>General>Reset.
** Depending on the device and applications installed your results will vary. Performing all of steps may not be necessary for every user. Doing a device reset and battery recharge has been successful for most users.