HP Armada 7300 Reference Manual page 41

Battery Conservation Settings Tab
In addition to the battery conservation settings, this tab also has an
option to turn off or on the low-battery warning beeps and, in
Windows NT, an option to disable or enable CD-ROM auto insert
notification.
Conservation Level and Settings: View or change the level of
battery conservation and the Custom conservation settings:
High—provides maximum battery conservation and the most
battery life from a single charge.
Medium—factory-default setting; provides a balance between
system performance and battery life.
None (Drain)—turns off battery conservation, so that the
system runs at full power.
Custom—allows you to specify timeout settings for Suspend,
system idle, hard disk idle, screen save, processor speed, and
brightness.
To view or change conservation levels quickly, press the
NOTE:
battery conservation hotkey
keys to select a different level in the popup window.
Fn+F7 Battery Conservation Hotkey Popup Window
4-8 Using Power and Power Management
Press the left or right arrow
Fn+F7.