My iBook (in Panther) has an annoying habit. It will run the battery down to about 1 hour to 45 minutes left. Then it will auto-sleep, with no warning, and nothing wakes it up until I plug it in. It seems like a calibration problem, but to calibrate the battery, shouldn't I do this exact thing -- run the battery until it auto sleeps? So in effect, I've been calibrating my battery when this happens. But if I'm calibrating, then the next time I use the computer, the battery life should be adjusted correctly, right? But it's not -- the same problem keeps recurring. The other battery problem I have is that sometimes I'll wake my fully-charged computer from sleep and then I'll get a warning that my battery is nearly dead. The little battery-meter will say that I've got, like 3 minutes left. Sometimes in a minute or two, the battery meter will readjust itself to 3.5 hours or something, but other times, it will auto-sleep and I'll need to wake it up again. Anyone had either of these problems before? Any solutions?