HP Pavilion zt1100 HP Pavilion zt1100/xz200 Series and HP Omnibook xt1500 Note - Page 46

Managing Power Consumption

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Batteries and Power Management Managing Power Consumption Managing Power Consumption When you're running your notebook on battery power, you will want to maximize operating time without compromising performance. Your notebook is designed to help you reduce power consumption and extend battery life without needing to turn it off. • During idle periods, the notebook automatically enters power-saving modes after specified timeout periods. You can adjust these timeouts to suit your working habits. • You can manually send the notebook into a power-saving mode at any time by pressing the appropriate key-see "To manage power manually" on page 48. How the notebook manages power automatically Your notebook automatically goes on standby or into hibernation and standby, and turns off the hard disk and display based on values set in Power Options in Control Panel. Automatic action Turns off hard disk. Turns off the hard disk drive. This is usually set to occur shortly after the display is turned off. Turns off display. Turns off the display to conserve battery power and extend the life of the display. Enters standby. Maintains your current session in RAM, and turns off the display and other components to conserve battery power. Enters hibernation. Saves your current session to the hard disk, then turns off the notebook. Lowers CPU speed (Pentium models only). Switches to the lower CPU speed to use power more efficiently. See below. Occurs after... The hard disk is not accessed for the specified interval. No keyboard, pointing device, or other input activity occurs for the specified interval. No pointing devices are used, no disk drive is accessed, and no port is active for the specified interval. The notebook stays on standby for the specified interval. The AC adapter is unplugged. To resume... Begin using the notebook: the hard disk turns on when needed. Press any key or move a pointing device to turn on the display. Press the power button to resume your session. Press the power button to resume your session. Plug in the AC adapter. 46 Reference Guide

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Batteries and Power Management
Managing Power Consumption
46
Reference Guide
Managing Power Consumption
When you’re running your notebook on battery power, you will want to maximize
operating time without compromising performance. Your notebook is designed to help
you reduce power consumption and extend battery life without needing to turn it off.
•
During idle periods, the notebook automatically enters power-saving modes after
specified timeout periods. You can adjust these timeouts to suit your working habits.
•
You can manually send the notebook into a power-saving mode at any time by
pressing the appropriate key—see “To manage power manually” on page 48.
How the notebook manages power automatically
Your notebook automatically goes on standby or into hibernation and standby, and turns
off the hard disk and display based on values set in Power Options in Control Panel.
Automatic action
Occurs after…
To resume…
Turns off hard disk.
Turns off the hard disk drive. This is usually
set to occur shortly after the display is turned
off.
The hard disk is not accessed
for the specified interval.
Begin using the notebook:
the hard disk turns on when
needed.
Turns off display.
Turns off the display to conserve battery
power and extend the life of the display.
No keyboard, pointing device, or
other input activity occurs for the
specified interval.
Press any key or move a
pointing device to turn on
the display.
Enters standby.
Maintains your current session in RAM, and
turns off the display and other components to
conserve battery power.
No pointing devices are used,
no disk drive is accessed, and
no port is active for the specified
interval.
Press the power button to
resume your session.
Enters hibernation.
Saves your current session to the hard disk,
then turns off the notebook.
The notebook stays on standby
for the specified interval.
Press the power button to
resume your session.
Lowers CPU speed (Pentium models only).
Switches to the lower CPU speed to use
power more efficiently. See below.
The AC adapter is unplugged.
Plug in the AC adapter.