Is this normal? My fiancee is using genuine charger AND lead. The charger is a little warm but expect that. The usb plug that goes into the charger gets warm and quite often very warm. She has let it cool sometimes before she can unplug lead as too hot to hold for long. She is using the tablet while charging, usually facebook but sometimes youtube. I think video playback is draining battery fast and thus drawing more from charger creating the heat. What's you thoughts please?