One of my batsticks won't charge up. I have left it on charge (with the supplied cable, and USB port direct) for many hours, using various chargers, that work fine with my other batsticks. When on charge, just one green light flashes. Using the button to check the battery level, all four green lights flash five times. The camera will not power up with the batstick in the camera.
Is there anything I can do to reset it?