Hello, I have been having the problem on and off for about a month now. It started with my iBook (while being plugged into AC) randomly switching to battery power (as if it had been unplugged, but it wasn't). Usually unplugging and replugging would work, or sometimes a simply jiggle. Now it's gotten serious. It will not charge at all. The plug-in still glows orange as if it is charging, but the computer won't recognize it, and the battery itself wont blink to indicate it's charging (the underside where the power indicator lights are). Does anyone know what's going on? The iBook is about 1 year old. (G4 800MHz). Thanks!