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Power
User Guide
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© Copyright 2006 Hewlett-Packard
Development Company, L.P.
Microsoft and Windows are U.S. registered
trademarks of Microsoft Corporation.
Bluetooth is a trademark owned by its
proprietor and used by Hewlett-Packard
company under license.
The information contained herein is subject
to change without notice. The only
warranties for HP products and services are
set forth in the express warranty statements
accompanying such products and services.
Nothing herein should be construed as
constituting an additional warranty. HP shall
not be liable for technical or editorial errors
or omissions contained herein.
First Edition: March 2006
Document Part Number: 406625-001
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Table of contents
1 Power control and light locations
2 Power sources
Connecting the AC adapter .................................................................................................................. 4
3 Standby and hibernation
Standby ................................................................................................................................................ 5
Hibernation ........................................................................................................................................... 6
Initiating standby, hibernation or shutdown .......................................................................................... 7
When you leave your work .................................................................................................. 7
When a reliable power supply is unavailable ....................................................................... 7
When using wireless communication (select models only), or readable or writable media
(select models only) ............................................................................................................. 8
4 Default power settings
Turning the computer or display on or off ............................................................................................. 9
Using emergency shutdown procedures ............................................................................................ 10
Initiating or resuming from standby .................................................................................................... 11
Initiating or restoring from hibernation ................................................................................................ 12
5 Power options
Accessing Power Options Properties ................................................................................................. 13
Displaying the Power Meter icon ........................................................................................................ 14
Setting or changing a power scheme ................................................................................................. 15
Setting a security prompt .................................................................................................................... 15
6 Processor performance controls
7 Battery packs
Inserting or removing a battery pack .................................................................................................. 20
Charging a battery pack ..................................................................................................................... 22
Monitoring the charge of the battery pack ......................................................................... 22
Obtaining accurate charge information ............................................................. 22
Displaying charge information on the screen .................................................... 23
Viewing charge displays ................................................................... 23
Interpreting charge indicators ........................................................... 23
Managing low-battery conditions ........................................................................................................ 24
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Identifying low-battery conditions ....................................................................................... 24
Low-battery condition ........................................................................................ 24
Critical low-battery condition ............................................................................. 24
Resolving low-battery conditions ....................................................................................... 25
When external power is available ..................................................................... 25
When a charged battery pack is available ........................................................ 25
When no power source is available .................................................................. 25
When the computer cannot restore from hibernation ........................................ 25
Calibrating a battery pack ................................................................................................................... 26
When to calibrate ............................................................................................................... 26
How to calibrate ................................................................................................................. 26
Step 1: Charging the battery pack ..................................................................... 26
Step 2: Discharging the battery pack ................................................................ 27
Step 3: Recharging the battery pack ................................................................. 28
Conserving battery power .................................................................................................................. 29
Conserving power as you work .......................................................................................... 29
Selecting power conservation settings .............................................................................. 29
Storing a battery pack ........................................................................................................................ 30
Disposing of a used battery pack ....................................................................................................... 30
Index ................................................................................................................................................................. 31
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1 Power control and light locations
The following illustration and table identify and describe the power control and light locations.
Component Description
(1) Internal display switch Turns off the display if the display is closed while the
notebook is turned on.
(2) Power lights* (2) On: The computer is on.
Blinking: The computer is in standby.
Off: The computer is off or in hibernation.
(3) Power button When the computer is
●
Off, press to turn on the computer.
●
On, press to enter hibernation.
●
In standby, briefly press to exit standby.
●
In hibernation, briefly press to exit hibernation.
If the computer has stopped responding and Microsoft®
Windows® shutdown procedures cannot be used, press
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Component Description
and hold the power button for at least 5 seconds to turn off
the computer.
(4) fn+f3 Initiates standby.
(5) Battery light Amber: A battery pack is charging.
Green: A battery pack is close to full charge capacity.
Blinking amber: A battery pack that is the only available
power source has reached a low-battery condition. When
the battery reaches a critical low-battery condition, the
battery light begins blinking rapidly.
Off: If the computer is plugged into an external power
source, the light is turned off when all batteries in the
computer are fully charged. If the computer is not plugged
into an external power source, the light stays off until the
battery reaches a low-battery condition.
*There are 2 power lights. Both display the same information. The light on the power button is visible
only when the computer is open; the other power light is always visible on the front of the computer.
2 Chapter 1 Power control and light locations ENWW
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2 Power sources
The computer can run on internal or external AC power. The following table indicates the best power
sources for common tasks.
NOTE Older AC adapters will not work with this computer.
Task Recommended power source
Work in most software applications
●
Charged battery pack in the computer
●
External power supplied through one of the
following devices:
●
AC adapter included with the computer
●
Optional docking device
●
Optional power adapter
Charge or calibrate a battery pack
in the computer
External power supplied through
●
AC adapter included with the computer
●
Optional docking device
●
Optional power adapter
WARNING! Do not charge the computer
battery pack while onboard aircraft.
Install or modify system software
or write to a CD or DVD
External power supplied through
●
AC adapter included with the computer
●
Optional docking device
●
Optional power adapter
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Connecting the AC adapter
WARNING! To reduce the risk of electric shock or damage to the equipment:
Plug the power cord into an AC outlet that is easily accessible at all times.
Disconnect power from the computer by unplugging the power cord from the AC outlet (not by
unplugging the power cord from the computer).
If provided with a 3-pin attachment plug on the power cord, plug the cord into a grounded (earthed)
3-pin outlet. Do not disable the power cord grounding pin; for example, by attaching a 2-pin
adapter. The grounding pin is an important safety feature. It is possible to receive an electric
shock from a system that is not properly grounded.
To connect the computer to external AC power:
1. Plug the AC adapter into the power connector (1) on the computer.
2. Plug the power cord into the AC adapter (2).
3. Plug the other end of the power cord into an AC outlet (3).
4 Chapter 2 Power sources ENWW
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3 Standby and hibernation
Standby and hibernation are energy-saving features that conserve power and reduce startup time. They
can be initiated by you or by the system. For more information, refer to "
Initiating standby, hibernation
or shutdown."
Standby
CAUTION To avoid a complete battery discharge, do not leave the computer in standby for
extended periods. Connect the computer to an external power source.
Standby reduces power to system components that are not in use. When standby is initiated, your work
is stored in random access memory (RAM), and then the screen is cleared. When the computer is in
standby, the power lights blink. When you resume from standby, your work returns to the screen where
you left off.
CAUTION To reduce the risk of information loss, save your work before initiating standby.
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Hibernation
CAUTION If the configuration of the computer is changed during hibernation, resuming from
hibernation may not be possible. When the computer is in hibernation:
Do not dock the computer to or undock the computer from an optional docking device.
Do not add or remove memory modules.
Do not insert or remove any hard drives or optical drives.
Do not connect or disconnect external devices.
Do not insert or remove external media cards.
Hibernation saves your work to a hibernation file on the hard drive, and then shuts down the computer.
The power lights are turned off. When you restore from hibernation, your work returns to the screen
where you left off. If a power-on password has been set, the password must be entered to restore from
hibernation.
CAUTION To reduce the risk of information loss, save your work before initiating hibernation.
You can disable hibernation. However, if hibernation is disabled and the system reaches a low-battery
condition, the system will not automatically save your work while power is on or when standby has been
initiated.
Use Power Options in Microsoft® Windows® Control Panel to reenable hibernation:
▲
Select Start > Control Panel > Performance and Maintenance > Power Options > Hibernate
tab.
Be sure that the Enable hibernation check box is selected.
To set the time interval after which the system initiates hibernation:
1. Select Start > Control Panel > Performance and Maintenance > Power Options.
2. Click one of the intervals in the System hibernates list.
6 Chapter 3 Standby and hibernation ENWW
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Initiating standby, hibernation or shutdown
The following sections explain when to initiate standby or hibernation and when to shut down the
computer.
NOTE You cannot initiate any type of networking communications or perform any computer
functions while the computer is in standby or hibernation.
When you leave your work
When standby is initiated, your work is stored in random access memory (RAM), and then the screen
is cleared. When the computer is in standby, it uses less power than when it is on. Your work returns
instantly to the screen when you resume from standby.
Initiating hibernation saves your work to a hibernation file on the hard drive, and then shuts down the
computer. When the computer is in hibernation, it uses much less power than when it is in standby.
When the computer will be unused and disconnected from external power for an extended period, shut
down the computer and remove the battery pack to extend the life of the battery pack. For details on
battery pack storage, refer to "
Storing a battery pack."
When a reliable power supply is unavailable
Be sure that hibernation remains enabled, especially if you are operating the computer on battery power
and do not have access to an external power supply. If the battery pack fails, hibernation saves your
work to a hibernation file and shuts down the computer.
If you pause your work when the power supply is uncertain, you take one of the following actions:
●
Save your work, and then initiate standby.
●
Initiate hibernation.
●
Shut down the computer.
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When using wireless communication (select models only), or
readable or writable media (select models only)
CAUTION To prevent possible audio and video degradation, or loss of audio or video playback
functionality, do not initiate standby or hibernation while reading or writing to a CD, a DVD, or an
external media card. To prevent loss of information, do not initiate standby or hibernation while
writing to a CD, a DVD, or an external media card.
Standby and hibernation interfere with the use of Bluetooth® and WLAN communication, and media.
Note the following guidelines:
●
If the computer is in standby or hibernation, you cannot initiate a Bluetooth or WLAN transmission.
●
If standby or hibernation is accidentally initiated during playback of a medium such as a CD, a DVD,
or an external media card
●
Your playback may be interrupted.
●
You may see the following warning message: "Putting the computer into hibernation or
standby may stop the playback. Do you want to continue?" Click No.
●
You may need to restart the media to resume audio and video playback.
8 Chapter 3 Standby and hibernation ENWW
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4 Default power settings
This section explains the default standby, hibernation, and shutdown procedures. For information about
changing the function of the power features on the computer, refer to "
Power options."
The controls and lights discussed in this chapter are illustrated in "
Power control and light locations."
Turning the computer or display on or off
Task Procedure Result
Turn on the computer. Press the power button.
●
The power lights are turned on.
●
The operating system loads.
Shut down the computer.* 1. Save your work and close all open
applications.
2. Shut down the computer through the
operating system by selecting Start > Turn
Off Computer > Turn Off*.
NOTE If the system is
unresponsive and you are unable to
shut down the computer with these
procedures, refer to "
Using
emergency shutdown procedures."
●
The power lights are turned off.
●
The operating system shuts
down.
●
The computer is turned off.
Turn off the display while the
power is on.
Close the computer. Closing the computer activates the
display switch, which initiates standby.
*If you have been registered to a network domain, the button you click will be called Shut Down instead of Turn Off
Computer.
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Using emergency shutdown procedures
CAUTION Emergency shutdown procedures result in the loss of unsaved information.
If the computer is unresponsive and you are unable to use normal Windows shutdown procedures, try
the following emergency procedures in the sequence provided:
●
Press ctrl+alt+delete. Then, select Shut Down > Turn Off.
●
Press and hold the power button for at least 5 seconds.
●
Disconnect the computer from external power and remove the battery pack. For more information
about removing and storing a battery pack, refer to “
Battery packs.”
10 Chapter 4 Default power settings ENWW
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Initiating or resuming from standby
Task Procedure Result
Initiate standby.
●
With the computer on, press fn+f3.
●
Select Start > Turn Off Computer > Stand
by*.
In Windows XP Professional, if Stand by is
not displayed:
a. Click the down arrow.
b. Select Stand by from the list.
c. Click OK.
●
The power lights blink.
●
The screen clears.
Allow the system to initiate
standby.
No action required.
●
If the computer is running on battery power,
the system initiates standby after 10 minutes
of computer inactivity (default setting).
●
If the computer is plugged into external
power, the system initiates standby after 25
minutes of computer inactivity (default
setting).
NOTE Power settings and timeouts
can be changed using Power Options in
Windows Control Panel.
●
The power lights blink.
●
The screen clears.
Resume from user-initiated
or system-initiated standby.
Press the power button.
●
The power lights are turned on.
●
Your work returns to the screen.
*If you have been registered to a network domain, the button you click will be called Shut Down instead of Turn Off
Computer.
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Initiating or restoring from hibernation
Hibernation cannot be initiated unless it is enabled. Hibernation is enabled by default.
To verify that hibernation remains enabled, Select Start > Control Panel > Performance and
Maintenance > Power Options > Hibernate tab. If hibernation is enabled, the Enable hibernation
check box is selected.
Task Procedure Result
Initiate hibernation.
●
Press the power button.
– or –
●
Select Start > Turn Off Computer*. Then,
hold down the shift key as you select
Hibernate.
In Windows XP Professional, if hibernate is
not displayed:
a. Click the down arrow.
b. Select Hibernate from the list.
c. Click OK.
●
The power lights are turned off.
●
The screen clears.
Allow the system to initiate
hibernation (with hibernation
enabled).
No action required. If the computer is running on
battery power, the system initiates hibernation
●
After 30 minutes of computer inactivity.
●
When the battery pack reaches a critical lowbattery condition.
NOTE Power settings and timeouts
can be changed using Power Options in
Windows Control Panel.
●
The power lights are turned off.
●
The screen clears.
Restore from user-initiated
or system-initiated
hibernation.
Press the power button.†
●
The power lights are turned on.
●
Your work returns to the screen.
*If you have been registered to a network domain, the button you click will be called Shut Down instead of Turn Off
Computer.
†If the system initiated hibernation because of a critical low-battery condition, connect external power or insert a charged
battery pack before you press the power button. (The system may not respond if the discharged battery pack is the only
power source.)
12 Chapter 4 Default power settings ENWW
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5 Power options
You can change many default power settings in Windows Control Panel. For example, you can set an
audio alert to warn you when the battery pack reaches a low-power condition, or you can change the
default settings for the power button.
By default, when the computer is on:
●
Pressing fn+f3, called the "sleep button" by the operating system, initiates standby.
●
By default, the display switch turns off the display and initiates standby. The display switch is
activated by closing the display.
NOTE When HP Mobile Data Protection has “parked a drive,” the computer will not initiate
standby or hibernation, and the display will simply be turned off.
Accessing Power Options Properties
To access Power Options Properties:
●
Right-click the Power Meter icon in the notification area, at the far right of the taskbar, and then
click Adjust Power Properties.
– or –
●
Select Start > Control Panel > Performance and Maintenance > Power Options.
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Displaying the Power Meter icon
By default, the Power Meter icon appears in the notification area, at the far right of the taskbar. The icon
changes shape to indicate whether the computer is running on battery or external power.
To remove the Power Meter icon from the notification area:
1. Right-click the Power Meter icon in the notification area, and then click Adjust Power Properties.
2. Click the Advanced tab.
3. Clear the Always show icon on the taskbar check box.
4. Click Apply and then click OK.
To show the Power Meter icon in the notification area:
1. Select Start > Control Panel > Performance and Maintenance > Power Options.
2. Click the Advanced tab.
3. Select the Always show icon on the taskbar check box.
4. Click Apply, and then click OK.
NOTE If you cannot see an icon you have placed in the notification area, at the far right of the
taskbar, click the Show Hidden Icons icon (< or <<) in the notification area.
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Setting or changing a power scheme
The Power Schemes tab in the Power Options Properties dialog box assigns power levels to system
components. You can assign different schemes, depending on whether the computer is running on
battery or external power.
You can also set a power scheme that initiates standby or turns off the display or hard drive after a time
interval that you specify.
To set a power scheme:
1. Right-click the Power Meter icon in the notification area, and then click Adjust Power Properties.
2. Click the Power Schemes tab.
3. Select the power scheme you want to modify, and adjust options in the lists on the screen.
4. Click Apply.
Setting a security prompt
You can add a security feature that prompts you for a password when the computer is turned on,
resumes from standby, or restores from hibernation.
To set a password prompt:
1. Right-click the Power Meter icon in the notification area, and then click Adjust Power Properties.
2. Click the Advanced tab.
3. Select the Prompt for password when computer resumes from standby check box.
4. Click Apply.
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6 Processor performance controls
CAUTION To prevent overheating, do not obstruct vents. Use the computer only on a hard, flat
surface. Do not allow another hard surface, such as a printer, or a soft surface, such as pillows,
thick rugs, or clothing, to block the airflow. Overheating can damage the computer and reduce
processor performance.
NOTE In some cases, a computer may operate at a higher speed on external power than on
battery power. If the battery power is extremely low, the computer may attempt to conserve power
by reducing processor speed and graphics performance.
Windows XP enables you to manage the processor performance controls by selecting a power scheme.
The processing speed can be set for optimal performance or for optimal power conservation.
Processor performance controls are managed in the Power Options Properties dialog box.
To access Windows XP processor performance controls:
▲
Select Start > Control Panel > Performance and Maintenance > Power Options.
The power scheme you select determines how the processor performs when the computer is plugged
into external power or is running on battery power. Each power scheme for external power or battery
power sets a specific processor state.
After a power scheme has been set, no other intervention is required to control the performance of the
computer processor. The following table describes the processor performance on external and battery
power for the available power schemes.
Power scheme Processor performance while on external
power
Processor performance while on battery
power
Home/Office Desk Always runs at the highest performance
state.
Performance state is determined based on
CPU demand.
Portable/Laptop (default) * Performance state is determined based on
CPU demand.
Performance state is determined based on
CPU demand.
Presentation Performance state is determined based on
CPU demand.
Performance state is determined based on
CPU demand.
Always On Always runs at the highest performance
state.
Always runs at the highest performance
state.
Minimal Power Management Performance state is determined based on
CPU demand.
Performance state is determined based on
CPU demand.
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Power scheme Processor performance while on external
power
Processor performance while on battery
power
Max Battery Performance state is determined based on
CPU demand.
CPU performance is lower when the Max
Battery setting is selected; however, battery
life will be extended.
* It is recommended that you use the Portable/Laptop power scheme.
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7 Battery packs
When a charged battery pack is in the computer and the computer is not plugged into external power,
the computer runs on battery power. When the computer is plugged into external AC power, the
computer runs on AC power.
If the computer contains a charged battery pack and is running on external AC power supplied through
the AC adapter, the computer switches to battery power if the AC adapter is disconnected from the
computer.
NOTE The display brightness is automatically decreased to save battery life when you
disconnect AC power. To increase display brightness, use the fn+f10 hotkey or reconnect the
AC adapter.
You can keep a battery pack in the computer or in storage, depending on how you work. Keeping the
battery pack in the computer whenever the computer is plugged into external AC power enables the
battery pack to charge and also protects your work in case of a power outage.
However, a battery pack in the computer slowly discharges when the computer is turned off and not
plugged into external power.
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Inserting or removing a battery pack
CAUTION To prevent loss of information when removing a battery pack that is the sole power
source, initiate hibernation or turn off the computer before removing the battery pack.
NOTE Battery packs vary in appearance by model.
To insert a battery pack:
1. Turn the computer upside down on a flat surface, with the battery bay toward you.
2. Slide the battery pack (1) into the battery bay until it is seated.
The battery pack release latches (2) automatically lock the battery pack into place.
To remove a battery pack:
1. Turn the computer upside down on a flat surface, with the battery bay toward you.
2. Slide the battery pack release latch on the right (1) and then the battery pack release latch on the
left (2) to release the battery pack.
NOTE You can also slide both battery pack release latches at the same time.
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3. Remove the battery pack from the computer (3).
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Charging a battery pack
To prolong battery life and optimize the accuracy of battery charge displays:
WARNING! Do not charge the computer battery pack on board aircraft. Charging the battery
pack may damage aircraft electronic systems.
●
If you are charging a new battery pack:
●
Charge the battery pack while the computer is plugged into external power through the AC
adapter.
●
When you charge the battery pack, charge it fully before turning on the computer.
●
If you are charging an in-use battery pack:
●
Allow the battery pack to discharge to about 10 percent of a full charge through normal use
before charging it.
●
When you charge the battery pack, charge it fully before turning on the computer.
A battery pack inserted in the computer charges whenever the computer is plugged into external power
through an AC adapter, an optional docking device, or an optional power adapter.
A battery pack inserted in the computer charges whether the computer is off or in use, but the battery
pack charges faster while the computer is off. Charging may be delayed if a battery pack is new, has
been unused for 2 weeks or more, or is much warmer or cooler than room temperature.
The battery light displays charge status:
●
On: The battery pack is charging.
●
Blinking: The battery pack has reached a low-battery condition and is not charging.
●
Blinking rapidly: The battery pack has reached a critical low-battery condition and is not charging.
●
Off: The battery pack is fully charged or not installed.
For information about determining the amount of charge in a battery pack, refer to "
Monitoring the charge
of the battery pack."
Monitoring the charge of the battery pack
This section explains several ways to determine the amount of charge in a battery pack.
Obtaining accurate charge information
To increase the accuracy of all battery charge indicators:
●
Allow a battery pack to discharge to about 10 percent of a full charge through normal use before
charging it.
●
When you charge a battery pack, charge it fully before turning on the computer.
●
If a battery pack has been unused for one month or more, calibrate the battery pack instead of
simply charging it. For calibration instructions, refer to "
Calibrating a battery pack."
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Displaying charge information on the screen
This section explains how to access and interpret battery charge indicators.
Viewing charge displays
To view information about the status of any battery pack in the computer:
●
Double-click the Power Meter icon in the notification area, at the far right of the taskbar.
– or –
●
Select Start > Control Panel > Performance and Maintenance > Power Options > Power
Meter tab.
Interpreting charge indicators
Most charge indicators report battery status as both a percentage and as the number of minutes of
charge remaining:
●
The percentage indicates the approximate amount of charge remaining in the battery pack.
●
The time indicates the approximate running time remaining on the battery pack if the battery pack
continues to provide power at the current level. For example, the time remaining will decrease when
you start playing a DVD and will increase when you stop playing a DVD.
When a battery pack is charging, a lightning bolt icon may be superimposed over the battery icon on
the Power Meter screen.
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Managing low-battery conditions
The information in this section describes the alerts and system responses set at the factory. Some lowbattery condition alerts and system responses can be changed using Power Options in Windows Control
Panel. Preferences set using Power Options do not affect lights.
Identifying low-battery conditions
This section explains how to identify low-battery and critical low-battery conditions.
Low-battery condition
When a battery pack that is the sole power source for the computer reaches a low-battery condition, the
battery light blinksin an amber color.
Critical low-battery condition
If a low-battery condition is not resolved, the computer enters a critical low-battery condition, and the
battery light blinks rapidly.
In a critical low-battery condition:
●
If hibernation is enabled and the computer is on or in standby, the computer initiates hibernation.
●
If hibernation is disabled and the computer is on or in standby, the computer remains briefly in
standby, and then shuts down and loses any unsaved information.
To verify that hibernation is enabled:
1. Select Start > Control Panel > Performance and Maintenance > Power Options > Hibernate
tab.
2. Be sure that the Enable hibernation support check box is selected.
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Resolving low-battery conditions
CAUTION To reduce the risk of losing information when the computer reaches a critical low-
battery condition and has initiated hibernation, do not restore power until the power lights are
turned off.
When external power is available
To resolve a low-battery condition when external power is available, connect one of the following:
●
AC adapter
●
Optional docking device
●
Optional power adapter
When a charged battery pack is available
To resolve a low-battery condition when a charged battery pack is available:
1. Turn off the computer or initiate hibernation.
2. Insert a charged battery pack.
3. Turn on the computer.
When no power source is available
To resolve a low-battery condition when no power source is available:
●
Initiate hibernation.
– or –
●
Save your work and shut down the computer.
When the computer cannot restore from hibernation
To resolve a low-battery condition when the computer lacks the power to restore from hibernation:
1. Insert a charged battery pack or plug the computer into external power.
2. Restore from hibernation by pressing the power button.
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Calibrating a battery pack
When to calibrate
Even if a battery pack is heavily used, it should not be necessary to calibrate it more than once a month.
It is not necessary to calibrate a new battery pack. Calibrate a battery pack under the following
conditions:
●
When battery charge displays seem inaccurate
●
When you observe a significant change in battery run time
●
When the battery pack has been unused for one month or more
How to calibrate
Three steps are involved in calibrating a battery pack: fully charging, fully discharging, and then fully
recharging.
Step 1: Charging the battery pack
A battery pack can charge whether the computer is off or in use, but it will charge faster when the
computer is off.
WARNING! Do not charge the computer battery pack on board aircraft. Charging the battery
pack may damage aircraft electronic systems.
To charge the battery pack:
1. Insert the battery pack into the computer.
2. Connect the computer to an AC adapter, optional power adapter, or optional docking device, and
then plug the adapter or device into external power.
The battery light on the computer is turned on.
3. Leave the computer plugged into external power until the battery pack is fully charged.
The battery light on the computer is turned off.
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Step 2: Discharging the battery pack
Before you begin a full discharge, disable hibernation.
To disable hibernation:
1. Select Start > Control Panel > Performance and Maintenance > Power Options > Hibernate
tab.
2. Clear the Enable hibernation check box.
3. Click Apply.
The computer must remain on while the battery pack is being discharged. The battery pack can
discharge whether or not you are using the computer but will discharge faster while the computer is in
use.
●
If you plan to leave the computer unattended during the discharge, save your information before
beginning the discharge procedure.
●
If you use the computer occasionally during the discharge procedure and have set energy-saving
timeouts, expect the following performance from the system during the discharge process:
●
The monitor will not turn off automatically.
●
Hard drive speed will not decrease automatically when the computer is idle.
●
System-initiated hibernation will not occur.
To fully discharge a battery pack:
1. Right-click the Power Meter icon in the notification area, at the far right of the taskbar, and then
click Adjust Power Properties.
– or –
Select Start > Control Panel > Performance and Maintenance > Power Options.
2. Record the 4 settings listed in the Running on batteries and Plugged in columns so that you can
reset them after the calibration.
3. Set the 4 options to Never.
4. Click OK.
5. Unplug the computer from its external power source, but do not turn off the computer.
6. Run the computer on battery power until the battery pack is fully discharged. The battery light begins
to blinkin an amber color. when the battery pack has discharged to a low-battery condition. When
the battery pack is fully discharged, the battery light is turned off and the computer shuts down.
ENWW Calibrating a battery pack 27
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Step 3: Recharging the battery pack
To recharge the battery pack:
1. Plug the computer into external power and maintain external power until the battery pack is fully
recharged. When the battery pack is recharged, the battery light on the computer is turned off.
You can use the computer while the battery pack is recharging, but the battery pack will charge
faster if the computer is off.
2. If the computer is off, turn it on when the battery pack is fully charged and the battery light is turned
off.
3. Select Start > Control Panel > Performance and Maintenance > Power Options.
4. Reenter the settings that you recorded for the items in the Plugged in column and the Running
on batteries column.
5. Click OK.
CAUTION After calibrating the battery pack, reenable hibernation. Failure to reenable
hibernation may result in a complete battery discharge and potential information loss.
To reenable hibernation, select Start > Control Panel > Performance and Maintenance >
Power Options > Hibernate tab. Select the Enable hibernation check box, and then click
Apply.
28 Chapter 7 Battery packs ENWW
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Conserving battery power
Using the battery conservation procedures and settings described in this section extends the time that
a battery pack can run the computer from a single charge.
Conserving power as you work
To conserve power as you use the computer:
●
Turn off wireless and local area network (LAN) connections and exit modem applications when you
are not using them.
●
Disconnect external devices that you are not using that are not plugged into an external power
source.
●
Stop, disable, or remove any external media cards that you are not using.
●
Disable or remove an inserted digital card.
●
Use the fn+f10 and fn+f9 hotkeys to adjust screen brightness as you need it.
●
Use optional powered speakers instead of the internal speakers, or adjust system volume as you
need it.
●
Press fn+f4 to switch the screen image from the computer display to an external display device.
●
If you leave your work, initiate standby or hibernation, or shut down the computer.
Selecting power conservation settings
To set the computer to conserve power:
●
Select a short wait for the screen saver, and select a screen saver with minimal graphics and
motion.
To access screen saver settings:
Select Start > Control Panel > Appearance and Themes > Choose a screen saver.
●
Select a Power Scheme with low power-use settings through the operating system. For more
information, refer to "
Setting or changing a power scheme."
ENWW Conserving battery power 29
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Storing a battery pack
WARNING! To avoid potential safety issues, use only the battery pack provided with the
computer, a replacement battery pack provided by HP, or a compatible battery pack purchased
as an accessory from HP.
CAUTION To prevent damage to a battery pack, do not expose it to high temperatures for
extended periods of time.
If a computer will be unused and unplugged from external power for more than 2 weeks, remove the
battery pack and store it separately.
To prolong the charge of a stored battery pack, place it in a cool, dry place.
Calibrate a battery pack before using it if it has been stored for one month or more.
Disposing of a used battery pack
WARNING! To reduce the risk of fire or burns, do not disassemble, crush, or puncture a battery
pack; short the external contacts on a battery pack; or dispose of a battery pack in fire or water.
Do not expose a battery pack to temperatures above 60˚C (140˚F). Replace the battery pack only
with a battery pack approved for this computer.
Refer to the Regulatory, Safety, and Environmental Notices for battery pack disposal information.
30 Chapter 7 Battery packs ENWW
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Index
A
AC adapter 4
B
battery charge information 22
battery light 22, 24
battery light, identifying 2
battery pack
battery power vs. AC power
19
calibrating 26
charging 22, 26
conserving power 29
disposing of 30
inserting 20
low-battery conditions 24
monitoring charge 22
recharging 28
removing 20
storing 30
using 19
battery pack release latch 20
Bluetooth device 8
button, power 1
C
calibration, battery 26
charging battery packs 22
computer display, turning on or off
9
connecting external power 4
conservation, power 29
critical low-battery condition 24
D
default power settings 9
display switch 1
drive media 8
E
emergency shutdown procedures
10
F
fn+f3 key 2
H
hibernation
defined 6
enabling/disabling 6
initiated during critical low-
battery condition 24
initiating 12
restoring from 12
when to use 6
hibernation file 6
I
infrared communication 8
L
lights
battery 2
power 1
low-battery condition 24
O
operating system 9
optional power adapter 3, 26
P
passwords, security 15
power
connecting 4
conserving 29
control and light locations 1
schemes 15
setting preferences 13
sources 3
power adapter 3
power button 1
power light 1
Power Meter icon 14
power settings 9
power supply 7
processor performance controls
17
R
readable media 8
reset (emergency shutdown
procedures) 10
S
screen saver 29
security passwords 15
shutdown procedures 10
shutting down 9
software, Power Meter 13
standby
defined 5
initiating 11
resuming from 11
T
temperature, storage, battery pack
30
traveling with the computer, battery
pack temperature considerations
30
turning off the computer 9, 10
U
unresponsive system, emergency
shutdown procedures 10
W
writable media 8
ENWW Index 31
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32 Index ENWW
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