I'm having the same problem as Trido was having. Yesterday I left it on the charger for about 5-6 hours at work. End of the day it still said it was charging, but I unplugged and the battery charger said full. Used it for about a 1/2 hour on the way home and then put it away for the night.

This morning it was totally off and wouldn't turn back on. I've had it on the charger at work since 9am this morning and it still says charging 7 hours later. I did try the suggestion of taking it off the charger using for a few minutes and then putting it back on the charger. Did that about an hour ago and it still shows charging.