Acer Aspire 1800 - Manual (Page 45)

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Eng
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English Power management
Your computer features built-in power management features that con-
stantly monitor system activity. System activity refers to any activity
involving one or more of the following devices: keyboard, touchpad/
mouse, hard disk drive, optical drive, peripherals connected to the
computer, and video memory. If no activity is detected for a period of
time (the settings are controlled in Windows Power Management), the
computer turns off some, or all, of these devices in order to conserve
power.
Your computer employs a power management scheme that supports
ACPI (Advanced Configuration and Power Interface), enabling maxi-
mum power conservation without compromising system performance.
ACPI allows Windows to control the amount of power given to each
device attached to the computer. In this way, Windows handles all
power-saving chores for your computer. Refer to Windows Help for
more information.
Note: The system will enter hibernation mode due to overloading
battery pack. Please save your data or switch to AC power.