Using Computer Setup - Compaq Armada 7400 Reference Manual

To extend the life of your batteries, use the Battery Conservation
tab in Power Properties. You can customize the level of battery
conservation or use one of four power management levels:
High—Select this level for the maximum amount of power
conservation possible in an automatic setting. Using this level,
you receive the most battery operating time from a single
charge.
Medium—Select this level for a balance between performance
and battery operating time. This is the default setting.
Custom—Select this level to customize timeout settings.
The custom level default settings are the same as the
medium level until you set your own values.
None (Drain)—Provides the maximum battery drain because
battery conservation is turned off. The computer runs at full
speed if power conservation level is set to none.
You can also set Power Management using Computer Setup.
1. Run Computer Setup.
2. Select the System Features icon.
3. Select the Power Management box.
4. Select the Battery Conservation tab.
5. Select a battery conservation level.
6. Select OK.