I have recently been having problems with my battery on my iPhone 4S like everyone else has. So I decided that I would go to my local Apple store and see what was wrong. They had done a diagnostic test on it and said that my software was corrupted. They told me that to fix this problem I need to sync the iPhone to iTunes and restore and set up as a new iPhone. He emailed me this link showing me step by step on how to fix the problem with out losing anything on my phone. So I tried it out and IT'S FINALLY FIXED! My battery goes down at least one percent every 2/3 hours, giving me that 200 hour stand by time. How to back up your data and set up as new device 1.Transfer your purchased content Transfer all content purchased or downloaded from iTunes, the App Store, and the iBookstore from the device to your computer before you restore. If you have movie rentals on the device, see iTunes Store movie rental usage rights in the United States before restoring. Purchased content is transferred while syncing, but you can also choose to transfer purchases by following the steps below or going to iTunes Store: Transferring purchases from your iPhone, iPad, or iPod to a computer. Launch iTunes. Connect the device with an Apple 30-pin Dock Connector Cable. Right-click the device from the source list. Choose Transfer Purchases. 2. Back up your device and preserve the backup The restore process creates a backup of the device you are restoring. When you select Set Up As New, a sync occurs that writes over your previous backup. To prevent unwanted data loss, you should take steps to preserve the backup created by iTunes. In iTunes, check Preferences > Devices to check the date and time of your latest backup. If you do not have a recent backup, create one by right-clicking the device in the source list and choosing Back Up. 3. Restore your device Restoring your device will delete all the data from your device, including songs, videos, contacts, photos, calendar information, and any other data. All device settings are restored to their factory condition. iTunes may need to connect to the Internet to verify or download a restore image for your device. For specific steps to take to restore your device and to learn more about the restore process, see iTunes: Backing up, updating, and restoring your iPhone, iPad, or iPod touch software. 4. Set up your device as new To set up as a new device in its factory configuration, choose "Set up as new" Be sure you have backed up the appropriate directory or backup files before choosing to set up as new. 5. Finishing touches Right-click the device in the source list and choose Restore from Backup and choose the desired backup from the list provided. Note* Restoring device creates another backup, be sure to choose the correct backup from the list [the one before factory restore], it will prompt telling you there is a newer restore point. Ignore and click USE OLDER RESTORE POINT. Will update your iPhone, leave connected as it will re-download all your apps back to your phone. After that you are finished. HOPE THIS WORKS FOR EVERYONE!