User's Manual

5.2.4 Low-Battery Warning
After a low-battery warning, save your work
immediately, then connect your notebook to an
electrical outlet. Hibernate mode will begin
automatically if the battery runs completely out of
power.
You will hear the low-battery warning when the battery
charge is approximately 90 percent depleted. Your
notebook will beep once, indicating approximately 10 to 15
minutes of battery operating time remain. If you do not
connect your notebook to alternative power source during
that time, there will be a periodic beep. Your notebook will
automatically enter hibernate mode if the battery charge
reaches a critically low level. For more information, see
Power Management.