Battery strange behaviour
I've been experiencing battery issue for the past few weeks.
My phone would shut down at random battery % (60%, 45% etc...). If I try to turn on the iphone again, I can't. It shows to plug it to Itunes. But after a few minutes, it turns on and battary % is back to the level at which it shut down.
I can't use my phone more than 5min latery. While using the weather app, or whatsapp, or safari, the phone shuts down.
Is it a battery problem (my battery is dead?) or a calibration problem? I can play music for 2-3 hours no prob.
Iphone 5 with latest IOS update.