Why is it that fully discharging a Li ion battery ruins it for all time? I have experienced this with my MacBook too. Closed it at 1% and forgot about it for two weeks. Battery was a paperweight when I returned.
You can go look it up on wikipeadia; but in summary, the battery relies on a chemical reaction to produce electricity. After a certain discharge point, the chemical reaction is irreversibly changed, and can no longer be recharged.
