Charging only works in a certain position, the device's input seems to

Hi there William, on occasion the Lighting Connector can become junked up with small particles & dust creating for a difficult bond between the power source and the actual lighting port on the iPad. I would attempt cleaning it out very carefully with a toothpick (Nothing that has metal =]) in order to remove any unwelcome dust particles. P.S. the pins for the lighting port are on top so steer towards the bottom when removing the dust.

Hope this helps! Have a wonderful day.