I don't know, suddenly in the morning when I kept my phone for charge, suprisingly it wasn't getting charged. I have restarted the phone, done all those little things which is said by people, nothing worked.
Remove battery, SIM card and SD card. Put back the battery and try to charge without the cards inserted. If the problem persists, I suggest that you try with another charger.
You can try to reset your phone to see if that helps. Otherwise I suggest that you have your phone examined by a service center. Please contact your local Xperia support team for more information:
