Sounds like it's not getting a charge. Is it connected well to the charger? Not too tight, though. Also, I would clean the battery connection and the charger's connection well. Double check the little round thingy inside the battery where it connects to the charger. It might've been pushed down too far to make the connection to the charger. With a paper clip or tip of a knife, carefully work the edge around the connector to pull it up a bit. This youtube vid shows you how. That might help. If not, then it might be that you have a faulty charger....
