candi

I have a 2013 Ford cmax. I've had to jump it the last few times to get it to start. But once I plug the charger on there the needle jumps all the way up and the car starts immediately. Now I plugged the charger in and put it on and the needle don't move and the car will not start. No lights will come on, no nothing. But the battery is showing its fully charged any ideas.??