>I switched the machine off, removed the battery, and let the laptop sit >for about 15 minutes without any power. Then I reinstalled the battery and >locked it in place. The battery was now showing that it was fully charged >(prior to all this, it appeared to be completely discharged, there were no >lights at all when I pressed the button on the battery). Then I tried to >start the machine using the battery -- no response. Then I used the mains >adaptor to start up the machine and after it was completely started up, I >disconnected the mains. This time the battery was connected and fully >charged. > >It makes no sense. Does anyone have an idea as to what might have >happened? From what little I know and can share, I believe your operations above reset your 'Book's power management settings, which can become corrupt and misrepresent your battery's readings. There exist some information regarding this circumstance on Apple's support pages. Keep monitoring your battery and let us on the list know your observations. Cheers, Brett -- The trouble with life is there's no background music. bforrester at macconnect.com