Using an iPhone 4 and a original power supply (a1357) + cable (usb) i am not able to charge the phone.
However connecting my phone to the pc (windows) it will be recognized and charge.
This behaviour occured after i updated to iOS 7.
I tried using another cable and another power supply (the 2nd is not original but certified for apple products).
I tried setting reduce movement to on because it was suggested in an apple forum. This did not help.