Digicam battery..?

im rechargin my panasonic digital camera.. but the light on the charger keeps on flashing..
it has been like this for almost half a day now whats goin on?
my battery is no good?
what can i do?

See if there is a refresh button on the charger.
Or put the battery into the camcorder and let it run dead, recharge it and let it run dead again.
If this fails to encourage it to charge then it will require a new battery.