The iPhone ships with a USB data cable that you can use to recover data from a backup, even if the battery in your mobile phone is dead. The battery recharges while the iPhone is connected to a computer via the USB cable, and you can recover data on your phone at the same time. Use iTunes to back up and recover your contacts, apps and other information if your data becomes corrupt because of a software glitch or the iPhone crashes. Writer Bio

How to Recover Data for an iPhone With a Dead Battery - 10