Epson ActionNote 866C User Manual page 68

Windows provides a Power icon in the Control Panel that
allows you to select Standard, Advanced, or no power
management modes and includes a battery status gauge. Use
the Windows Power utility on-line help for more information
about these features.
Once you have enabled your computer's power management
features and APM, the following operations are performed by
APM:
Takes over power management functions from the system
BIOS
Monitors all system activity
Detects true inactive states and power demands of the
operating system and applications
Determines when to activate the necessary power
management features
Allows MS-DOS, the computer's BIOS, and your
application programs to share power management features
in the most efficient manner.
Note
If you disable your computer's power management features,
APM is also disabled, even if you have configured your
software to use it.
Powering the Computer 3-11