Hi, I'm having trouble with my iPad 4 when it comes to charging. When I plug it into the wall socket the battery icon in the upper right corner changes and appears to be charging, it changes to the battery icon with the electric bolt symbol through it. However it doesn't seem to be charging percentage wise. What I've tried Charging iPhone with the same socket and adaptor, I have no issues when charging my phone. Reset iPad using the Home and sleep button method. I'm yet to try a full backup and restore. Has anyone else had this issue?