iPhone 5 switching itself off
I have an iphone 5, and had it since they came out, October 2012??
The phone keeps switching itself off. And won't go back on since the empty battery sign shows on the screen indicating that the battery is flat.
The phone is never flat and often has over 60% of charge left.
In some cases, if an hour or so passes, it can be switched back on and the battery indicator shows what it had just before it powered off.
As of today, 22nd Decemer 2013, I am running the most up to date version of iOS.
Any ideas?
iPhone 5, iOS 6.0.1