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Using a Battery 41
Low-Battery Warning
NOTICE: To avoid losing or corrupting data, save your work immediately after a low-battery warning, and then
connect the computer to an electrical outlet. If the battery runs completely out of power, hibernate mode begins
automatically.
By default, a pop-up window warns you when the battery charge is approximately 90 percent depleted.
You can change the settings for the battery alarms. See "Configuring Power Management Settings" on
page 42 for information about accessing the Power Options Properties window.
Conserving Battery Power
Perform the following actions to conserve battery power:
• Connect the computer to an electrical outlet when possible because battery life is largely determined
by the number of times the battery is used and recharged.
• Place the computer in standby mode or hibernate mode when you leave the computer unattended for
long periods of time. See "Power Management Modes" on page 41 for more information about standby
and hibernate modes.
• Select options to optimize your computer’s power usage. These options can also be set to change when
you press the power button, close the display, or press <Fn><Esc>. See "Configuring Power
Management Settings" on page 42 for more information.
NOTE: See "Battery Performance" on page 39 for more information on conserving battery power.
Power Management Modes
Standby Mode
Standby mode conserves power by turning off the display and the hard drive after a predetermined
period of inactivity (a time-out). When the computer exits standby mode, it returns to the same
operating state it was in before entering standby mode.
NOTICE: If your computer loses AC and battery power while in standby mode, it may lose data.
To enter standby mode:
• Click the
Start
button, click
Turn off computer
, and then click
Stand by
.
or
• Depending on how you set the power management options on the
Advanced
tab (see "Configuring
Power Management Settings" on page 42) in the
Power Options Properties
window, use one of the
following methods:
– Press the power button.
– Close the display.
– Press <Fn><Esc>.