I picked up the $35 Blu starter kit 5 days ago. The batteries and charger worked fine for a couple days, but now it seems that the charger's not charging fully, either that or the batteries are already worn out. One battery lasts for just a couple hours (it was lasting for about half a day for the first couple days), and one seems to be completely dead and not charging. When I put the dead one in the charger, the red light on the side blinks. When a battery is charging, the red light is solid till it is charged. But in this case, the red light blinks then goes out. And it doesn't seem to charge. Does the red light blinking mean the battery is supposed to be fully charged already, or could it mean the battery is dead?