Check page 25 of your manual, when you press once the lights will show battery life(not charge) you show one light, than means you are at 20 to 30% life. does your charger charge other batteries (could be the charger). One light blinking on charge means from 0% to 12% charge, you should never drop it down to 0%, the battery does like that and this may permanently damage the battery. If it is still on warranty send it in. One thing that used to work on older battery firmware was to hold down the power button onced pluged in the the charger, all the lights would come on then go to the charge level then let go of the button. Try it as you have nothing to lose.