My 'new' iPad is at 4% battery, and having plugged it in to charge (using the Lightning connector), the battery icon at the top right keeps flashing (charging to not charging) really quickly and making the charge noise continuously. This happens when connected to all sockets in my house, so is not an issue with the mains. Is this a problem with my iPad or with the Lightning connector? Please help. This iPad is essential for work purposes and I need it up and running as soon as possible.
iPad (4th gen) Wi-Fi, iOS 6.1.3, Never had this problem before.