My iPhone 4S gives up at 10%-15% power left recently. Unless I carry a battery pack, it flat out gives up and shuts down. When I hold the power button, it says recharge at the 1% marker. Is this a sign the battery is at the end of its life?
Have you tried to reset your phone yet?
Except for formatting the iPhone, yep. Might try formatting it this time.
Yeah. Restoring. As a new iPhone.
If you havent tried from backup, do that first, then do as new if the other doesnt work. Then if both dont, go to apple genious bar and have them check and replace the battery if its bad now.
Retrieving data ...