Yesterday my daughter played on the iPad for a long time and only stopped when charging is completely finished. My wife didn't know about it and she tried to start the iPad by pressing the power button only to find that there is no battery charging remaining. She put the iPad on charge but even after a long time it wasn't charging. I told my wife to check if the charger is plugged properly, but she keep saying to me that she always sees the charging sign as shown below and assumes that the charger is plugged properly.