Hey all, I was wondering if someone could help me with a problem. My iBook G4 wont go into sleep while at the end of the battery life. I'll be working on something, watching a streaming video for instance, and instead of alerting me that "the computer is now running on reserve power" like it should, it just shuts off! I have check my energy settings and it's set to sleep after 5 minutes of inactivity while on battery. But shouldn't that warning come up when there is activity near the end of battery life? Can anyone help? Thanks!