iPhone 4S turns off when using camera without battery being drained
Hi,
When using the camera on my iPhone 4S IOS 5.1, the phone will shut down eventhough there's plenty of battery left. Today it turned itself off at about 40%. When trying to turn the phone on again, the "no battery power remains" pic shows. I then plug in the power cord and the phone turns on. Battery indicator now shows 42%.
This happend many times on IOS 5.01 as well, where battery indicator would show anywhere between 20 and 40% when the phone would shut down.
Is this normal behavior?
iPhone 4S, iOS 5.1