This is what comes of using your laptop too much...
So, perhaps it's not as bad as kwc's iPod, but it still bites. This is an XBattery graph of my work Powerbook's estimated battery capacity. It goes back to close to the beginning.
Yes, I'd logged some serious hours on that machine, but most of them were with it plugged in. Hrm, perhaps that's the most disturbing part...
Battery life on this Powerbook started at about 4 hours. It now shuts off after about 1:25. Fortunately, unlike kwc's situation, I can probably get work to replace it, and the cost of replacing the battery is low (and physically trivial)...