I have a powerbook g4 1.3 ghz with an odd problem. It will not run off the battery anymore. Various utilities tell me that the battery is fully charged, the adapter's light is green, but the lights on the battery itself do not come on. It happened just a week after the one year warranty is up and I don't have applecare so apple won't help me. It was working fine from the battery the day before, when I put it to sleep and unplugged the adapter it just shut off, and wouldn't come back on without the adapter plugged in. Has anyone had a problem like this before? Thanks for your help.