I've had my vision spinner for a few months now, and I guess I never really paid it any attention while it's charging. I know the battery is fully charged when the light on the charger turns a solid green, and that's what happened today, however briefly. What happened was the light on the spinner button started blinking and the light on the charger went to a solid green, but then the spinner button light went out and the charger light went back to alternating between red and green. Does this mean it's charged or is something wrong?