Broadcom BRCM1019 802.11ag Wireless LAN PCI-E Mini Card User Manual Manual Title
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Contents
Users manual part B
Hardware and Software Guide 2–1
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2
Power
Power Control and Light Locations
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Component Description
1fn+f3 Initiates Standby.
2Power/standby switch When the tablet PC is
■Off, slide to the left and release to
turn on the tablet PC.
■In Standby, slide to the right or left
and release to exit Standby.
■In Hibernation, slide to the right or
left and release to exit
Hibernation.
■On, slide to the right and release
to enter Standby.
If the tablet PC has stopped
responding and Microsoft® Windows®
shutdown procedures cannot be used,
slide to the left and hold for 5 seconds
to turn off the tablet PC.
3Power light Green: The tablet PC is on.
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4Standby light Blinking green: The tablet PC is in
Standby mode.
5Power/standby light Green: The tablet PC is on.
Blinking green: The tablet PC is in
Standby mode.
6Battery 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 more quickly.
Off: If the notebook is connected to an
external power source, the light is
turned off when all batteries in the
notebook are fully charged. If the
notebook is not connected to an
external power source, the light is
turned off until the battery reaches a
low-battery condition.
Component Description
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Selecting a Power Source
The tablet PC can run on internal or external AC power. The
following table indicates the best power sources for common
tasks.
Task Recommended Power Source
Work in most software applications ■Charged battery pack in the
tablet PC
■External power supplied through
one of the following devices:
❐AC adapter
❐Optional docking device
❐Optional Aircraft Adapter
❐Optional Automobile Power
Adapter/Charger
❐Optional 90W Air/Auto/AC
Combo Adapter
Charge or calibrate a battery pack in
the tablet PC
External power supplied through
■AC adapter
■Optional docking device
■Optional Automobile Power
Adapter/Charger
■Optional 90W Air/Auto/AC
Combo Adapter
ÄTo prevent damage to the
tablet PC and aircraft
systems, do
not
charge the
battery pack while you are
using an Auto/Air/AC
Adapter on an aircraft.
Install or modify system software or
write to a CD
External power supplied through
■AC adapter
■Optional docking device
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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. Refer to the “Initiating Standby, Hibernation or
Shutdown” section in this chapter for details about when to use
each setting.
Standby
ÄCAUTION: To avoid a complete battery discharge, do not leave your
tablet PC in Standby for extended periods. Connect the tablet PC to an
external power source.
Standby reduces power to system components that are not in use.
When Standby is initiated, your work is saved in random access
memory (RAM) and the screen is cleared. When you resume
from Standby, your work returns to the screen where you left off.
■Saving your work before initiating Standby is not usually
necessary but is a recommended precaution.
■When the tablet PC is in Standby, the standby light and the
power/standby light flash.
Hibernation
Hibernation saves your work to a hibernation file on the hard
drive, and then shuts down the tablet PC. 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.
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.
In the Power Options window, Hibernation is not displayed as an
option if it has been disabled. You must enable Hibernation in
order to select it in the Power Options window. To verify that
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Hibernation is enabled, select Start > Control Panel > Power
Options > Hibernate tab. Make sure that the Enable hibernate
support check box is selected.
ÄCAUTION: If the configuration of the tablet PC is changed during
Hibernation, resuming from Hibernation may not be possible. When the
tablet PC is in Hibernation:
■Do not dock or undock the tablet PC in a docking device.
■Do not add or remove memory modules.
■Do not insert or remove any hard drives.
■Do not connect or disconnect external devices.
■Do not insert or remove a PC Card or a Secure Digital (SD)
Memory Card.
Initiating Standby, Hibernation or
Shutdown
The following sections explain when to initiate Standby or
Hibernation and when to shut down your tablet PC.
When You Leave Your Work
Initiating Standby clears the screen and uses less power than
leaving the tablet PC on. Your work returns instantly to the screen
when you resume from Standby.
Initiating Hibernation clears the screen, saves your work to the
hard drive, and uses much less power than Standby.
Shutting down the tablet PC and removing the battery pack is
recommended to extend the life of the battery pack when the
tablet PC will be disconnected from external power for an
extended period. For details on battery pack storage, refer to the
“Storing a Battery Pack” section in this chapter.
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When the Power Supply Is Uncertain
Make sure that Hibernation remains enabled, especially if you are
operating the tablet PC 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 tablet
PC.
HP recommends that if you pause your work when the power
supply is uncertain, you do one of the following:
■Initiate Hibernation.
■Shut down the tablet PC.
■Save your work, and then initiate Standby.
When Using Infrared Communication or
Drive Media
ÄCAUTION: Do not initiate Standby or Hibernation while using drive
media. Doing so may result in possible video and audio degradation
and loss of audio or video playback functionality.
Standby and Hibernation interfere with the use of infrared and
Bluetooth communication, and drive media. Note the following
guidelines:
■If the tablet PC is in Standby or Hibernation, you cannot
initiate an infrared or Bluetooth transmission.
■If Standby or Hibernation is accidentally initiated while a
drive medium (such as a diskette, CD, or DVD) is in use:
❏Your playback may be interrupted.
❏You may see a warning message: “Putting the computer
into Hibernation or Standby may stop the playback. Do
you want to continue?” Select No.
❏You may need to restart the playback to resume audio and
video.
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Using the Default Power Settings
The following tables describe the factory power settings on the
tablet PC. You can change many of these settings according to
your preference. For more information on changing power
settings, refer to the “Managing Power Options” section in this
chapter.
Turning the Tablet PC or Display On or Off
Task Procedure Result
Turn on the
tablet PC.
Slide the power/standby switch
to the left.
■The power light and
the power/standby
light are turned on.
■The operating
system loads.
Shut down the
tablet PC.*
Save your work and close all
open applications. Then
■Slide the power/standby
switch to the left and follow
the on-screen directions (if
displayed) for shutting
down the tablet PC.
■Shut down the tablet PC
through the operating
system. Select Start >
Shut Down> Shut Down
> OK.
■The power light and
power/standby light
are turned off.
■The operating
system shuts
down.
■The tablet PC is
turned off.
Turn off the
display while the
power is on.
Close the tablet PC. Closing the tablet PC
activates the display
switch, which turns off
the display. This
conserves battery
power.
* If the system is unresponsive and you are unable to shut down the tablet PC
with these procedures, refer to the “Using Emergency Shutdown Procedures”
section in this chapter.
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Initiating or Restoring from Hibernation
Task Procedure Result
Initiate
Hibernation.
■Select Start > Shut Down>
Hibernate > OK. (If the
Hibernate option is not
displayed, press and
hold the shift key.)
■If Hibernation has been
configured, slide the
power/standby switch to the
right or left.
■The power
light and
power/standby
light are turned
off.
■The screen
clears.
Allow the system
to initiate
Hibernation
(with
Hibernation
enabled).
No action required.
■If the tablet PC is running on
battery power, the system
initiates Hibernation after 30
minutes of tablet PC
inactivity or when the battery
pack(s) reach a critical
low-battery condition.
■If the tablet PC is connected
to external power, the
system does not initiate
Hibernation.
■Power settings and timeouts
can be changed in the
Power Options window.
■The power
light and
power/standby
light are turned
off.
■The screen
clears.
Restoring from
user-initiated or
system-initiated
Hibernation.
Slide the power/standby switch to
the right or left.
✎If the system initiated
Hibernation because of
a critical low-battery
condition, connect
external power or insert
a charged battery pack
before you slide the
power/standby switch.
■The power
light and
power/standby
light are turned
on.
■Your wo r k r e t u r ns
to the screen.
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Initiating or Resuming from Standby
Task Procedure Result
Initiate Standby. ■Slide the power/standby
switch to the right.
■With the tablet PC on,
press fn+f3.
■Select Start > Shut
Down> Standby > OK.
(If the Standby option
is not displayed, press the
shift key.)
■The power light and
power/standby light
blink.
■The screen clears.
Allow the system
to initiate
Standby.
No action required.
■If the tablet PC is running
on battery power, the
system initiates Standby
after 10 minutes of tablet
PC inactivity. (Default
setting)
■If the tablet PC is attached
to external power, the
system does not initiate
Standby.
■Power settings and
timeouts can be changed
in the Power Options
window.
■The standby light
and power/standby
light blink.
■The screen clears.
Resume from
user-initiated or
system-initiated
Standby.
■Slide the power/standby
switch to the right or left.
■If the display was closed
while the tablet PC was in
Standby, open the display.
■The standby light
and power/standby
light are turned off.
■Your work returns
to the screen.
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Using Emergency Shutdown Procedures
ÄCAUTION: Emergency shutdown procedures result in the loss of
unsaved data.
If the tablet PC 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. Select Shut Down.
■Slide and hold the power/standby switch to the left for at least
5 seconds.
■Disconnect the tablet PC from external power and remove
the battery pack. For more information about removing
and storing the battery pack, refer to the “Storing a Battery
Pack” section in this chapter.
Managing Power Options
Many default power settings can be changed in the Power
Options window. 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/standby
switch.
By default, when the tablet PC is on:
■Pressing the power/standby switch to the right initiates
Standby.
■Pressing the fn+f3 hotkey, called the “sleep button” in the
operating system, initiates Standby.
■The display switch turns off the display. The display switch is
activated by closing the display. (By default and when using
custom settings, the display switch also turns on the tablet PC
if the display is opened while the tablet PC is in Standby.)
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Accessing the Power Options Window
To access the Power Options window, double-click the Power
Meter icon on the taskbar, or select Start > Control Panel >
Power Options.
Displaying the Power Meter Icon
The Power Meter icon is on your taskbar by default. The icon
changes shape to indicate whether the tablet PC is running on a
battery pack or external power. Double-click the icon to display
the Power Options window.
To hide or show the Power Meter icon on the taskbar:
1. Access the Power Options window.
2. Select the Advanced tab.
3. Select or clear the Always show icon on the taskbar
check box.
4. Select Apply.
5. Select OK.
✎If you cannot see an icon you have placed on the taskbar, the icon
may be hidden. Select the arrow or vertical bar on the taskbar and
expand it to view hidden icons.
Setting or Changing a Power Scheme
The Power Schemes tab in the Power Options window assigns
power levels to system components. You can assign different
schemes depending on whether the tablet PC is running on a
battery pack 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.
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To set a power scheme:
1. Access the Power Options window, and then select the
Power Schemes tab.
2. Select the power scheme you wish to modify, and adjust
options in the lists on the screen.
3. Select Apply.
Using a Security Password
You can add a security feature that prompts you for a password
when the tablet PC is turned on or restores from Standby or
Hibernation.
To set a password prompt, access the Power Options window,
and then select the Advanced tab. Select the check box for
Prompt for password when the computer resumes from
Standby, and select Apply.
For more information about using security passwords, refer to
Chapter 9, “Security.”
Processor Performance Controls
On select tablet PC models, Windows XP supports software that
enables you to control processor performance. The central
processing unit (CPU) speed can be set for optimal performance
or for optimal power conservation.
For example, the software can be set to trigger an automatic
change in processor speed when the power source changes from
external power to battery pack power, or when the tablet PC use
changes between active and idle.
Processor performance controls are managed in the Power
Options window.
To access Windows XP processor performance controls, select
Start > Control Panel > Power Options > Power Schemes tab.
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The power scheme you select determines how the processor
performs when the tablet PC is connected to external power or is
running on battery power. Each power scheme for external power
or battery power sets a specific processor state.
Different states may be used, depending on whether the tablet PC
is running on external or battery power. After a power scheme
has been set, no other intervention is required to control the
performance of your tablet PC 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 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.
Starts at lowest
performance state,
then uses linear
performance reduction
(stop-clock throttling)
as the battery
discharges.
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Using Battery Packs
When the tablet PC is connected to external AC power, the tablet
PC runs on AC power. When a charged battery pack is in the
tablet PC and the tablet PC is not connected to external power, the
tablet PC runs on battery power.
The tablet PC switches between AC power and battery power
according to the availability of an external AC power source. For
example, if the tablet PC contains a charged battery pack and is
running on external AC power supplied through the AC adapter,
the tablet PC switches to battery power if the AC adapter is
disconnected from the tablet PC.
You can leave a battery pack in the tablet PC or in storage,
depending on how you work. Keeping a battery pack in the tablet
PC enables the battery pack to charge whenever the tablet PC is
connected to external AC power and also protects your work in
case of a power outage.
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.
Max Battery Performance state is
determined based on
CPU demand.
Starts at lowest
performance state,
then uses linear
performance reduction
(stop-clock throttling)
as the battery
discharges.
Power Scheme
Processor
Performance While
on External Power
Processor
Performance While
on Battery Power
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However, battery packs in the tablet PC slowly discharge when
the tablet PC is turned off. For this reason, the primary battery
pack is not shipped inside the tablet PC and must be inserted
before the tablet PC can run on battery power.
Identifying Battery Packs
This tablet PC supports up to 2 battery packs:
■The primary battery pack is a 6-cell lithium-ion battery pack
that can be used only in the battery bay. One primary battery
pack is included with the tablet PC.
■The travel battery pack is an optional 8-cell lithium-ion
battery pack that can be used only in the travel battery case.
If you will not be using the tablet PC for 2 weeks or more, remove
the battery pack and store it as described in the “Storing a Battery
Pack” section in this chapter to prolong battery pack life. For
more information about leaving your work, refer to the “Initiating
Standby, Hibernation or Shutdown” section in this chapter.
✎Only compatible AC adapters and battery packs should be used
with the tablet PC. For additional information, visit the HP Web
site at http://www.hp.com or use the Worldwide Telephone Numbers
booklet, included with your tablet PC, to contact Customer Care.
Inserting or Removing a Primary
Battery Pack
ÄCAUTION: To prevent loss of work when removing a battery pack that
is the sole power source, initiate Hibernation or turn off the tablet PC
before removing the battery pack.
To insert a primary battery pack:
1. Turn the tablet PC upside down.
2. Slide the battery pack 1 into the battery bay until it is seated.
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3. Press the battery pack 2 into the tablet PC.
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To remove a primary battery pack:
1. Turn the tablet PC upside down with the battery bay toward
you.
2. Press the battery release latch 1 to the right.
3. Slide the battery pack 2 out of the tablet PC.
Attaching or Detaching an Optional Travel
Battery
To attach an optional travel battery:
1. Turn the tablet PC upside down with the primary battery bay
toward you.
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2. Open the travel battery connector on the bottom of the tablet
PC by sliding the cover to the right.
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3. Insert the tabs on the travel battery caddy into the recesses on
the bottom of the tablet PC 1.
4. Press the travel battery caddy onto the tablet PC until it snaps
into place 2.
5. Slide the locking latch 3.
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To detach an optional travel battery:
1. Unlock the travel battery from the tablet PC by sliding the
locking switch 1.
2. Press the release latch 2.
3. Lift the travel battery 3 up and away from the tablet PC.
Charging Battery Packs
Multiple battery packs in the system charge and discharge in a
preset sequence:
■Charge sequence:
1. Primary battery in the tablet PC battery bay
2. Travel battery
■Discharge sequence:
1. Travel battery
2. Primary battery in the tablet PC battery bay
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While a battery pack is charging, the battery light on the tablet PC
is on. The light is turned off when all battery packs are fully
charged.
✎Battery packs can also be charged in the optional HP Universal
Charger.
Charging the Primary Battery
ÄCAUTION: To prevent damage to the tablet PC and aircraft systems, do
not charge the battery pack while you are using an Auto/Air/AC
Adapter on an aircraft.
The primary battery pack charges when it is inserted into the
tablet PC and the tablet PC is connected to external power.
External power can be supplied through the following:
■AC adapter
■Optional docking device
■Optional Automobile Power Adapter/Charger
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■Optional 90W Air/Auto/AC Combo Adapter
✎An optional Aircraft Power Adapter can run the tablet PC, but it
cannot charge a battery pack.
Charging an Optional Travel Battery
The battery pack in the travel battery charges when it is attached
to the tablet PC and the tablet PC is connected to external power.
External power can be supplied through the following:
■AC Adapter
■Optional docking device
■Optional Automobile Power Adapter/Charger
■Optional 90W Air/Auto/AC Combo Adapter
✎Because the travel battery covers the docking connector, the
travel battery cannot be used or charged with a docking device.
✎An optional Aircraft Power Adapter can run the tablet PC, but it
cannot charge a battery pack.
Charging a New Battery Pack
Fully charge the battery pack while the tablet PC is connected to
external power through the AC adapter.
A new battery pack that has been partially but not fully charged
can run the tablet PC, but the battery charge indicators may
be inaccurate.
Charging an In-Use Battery Pack
To prolong battery life and increase the accuracy of battery
charge indicators:
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■Allow a battery pack to discharge to 10 percent of a full
charge through normal use before charging it.
■When you charge a battery pack, charge it fully.
Monitoring the Charge of a Battery
Pack
This section explains several ways you can determine the amount
of charge in your battery pack.
Obtaining Accurate Charge Information
To increase the accuracy of all battery charge displays:
■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.
■If a battery pack has not been used for one month or more,
calibrate the battery pack instead of simply charging it. For
calibration instructions, refer to the “Calibrating a Battery
Pack” section in this chapter.
Displaying Charge Information on the
Screen
This section explains how to access and interpret battery charge
displays.
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Viewing Charge Displays
To view information about the status of any battery pack in the
tablet PC:
■Select the Power Meter icon on the taskbar.
-or-
■Select Start > Control Panel > Power Options > Power
Meter tab.
Interpreting Charge Displays
Most charge displays report battery status as both a percentage
and as the number of minutes of charge remaining.
■The percentage indicates the 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.
Most charge displays identify battery packs by location:
■Location 1 is the battery pack in the primary battery bay.
■Location 2 is the optional travel battery pack.
On some displays, a lightning bolt icon may be displayed on the
charge display beside a battery pack location. The icon indicates
that the battery pack in that location is charging.
Managing Low-Battery Conditions
Some low-battery condition alerts and system responses can be
changed in the Power Options window of the operating system.
The information in this section describes the alerts and system
responses set at the factory. Preferences set in the Power Options
window do not affect lights.
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Identifying Low-Battery Conditions
This section explains how to identify low and critical low-battery
conditions.
Low-Battery Condition
When a battery pack that is the only power source for the tablet
PC reaches a low-battery condition, the battery light blinks.
Critical Low-Battery Condition
If a low-battery condition is not resolved, the tablet PC enters
a critical low-battery condition.
In a critical low-battery condition:
■If Hibernation is enabled and the tablet PC is on or in
Standby, the tablet PC initiates Hibernation.
■If Hibernation is disabled and the tablet PC is on or in
Standby, the tablet PC remains briefly in Standby, then
shuts down and loses your unsaved work.
To verify that Hibernation is enabled, select Start > Control
Panel > Power Options > Hibernate tab. Make sure that the
Enable hibernate support check box is selected.
Resolving Low-Battery Conditions
ÄCAUTION: If the tablet PC has reached a critical low-battery condition
and has initiated Hibernation, do not restore power until the
power/standby light is turned off.
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When External Power Is Available
To resolve a low-battery condition when external power is
available, do one of the following:
■Connect the AC adapter.
■Plug an optional Automobile Power Adapter/Charger into the
tablet PC and into a vehicle cigarette lighter receptacle.
■Plug an optional 90W Air/Auto/AC Combo Adapter into the
tablet PC and into a vehicle cigarette lighter receptacle or into
the in-seat power supply available on some commercial
aircraft.
ÄTo prevent damage to the tablet PC and aircraft systems,
do
not
charge the battery pack while you are using an
Auto/Air/AC Adapter on an aircraft.
■Plug an optional Aircraft Power Adapter into the tablet PC
and into the in-seat power supply available on some
commercial aircraft. (An optional Aircraft Power Adapter
can run the tablet PC but cannot charge a battery pack.)
When a Charged Battery Pack Is Available
To resolve a low-battery condition when a charged battery pack is
available, turn off the tablet PC or initiate Hibernation, insert a
charged battery pack, and then turn on the tablet PC.
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 tablet PC.
When theTablet PC Cannot Exit Hibernation
To resolve a low-battery condition when the tablet PC lacks the
power to exit Hibernation:
1. Insert a charged battery pack or connect external power.
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2. Exit Hibernation by pressing the power/standby switch to the
right or left.
Calibrating a Battery Pack
This section describes when and how to calibrate 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 before first use. Calibrate the battery
pack under the following conditions:
■When battery charge displays seem inaccurate.
■When you observe a significant decrease in battery run time.
■When the battery pack has been unused for one month
or more.
How to Calibrate
To calibrate a battery pack, you must fully charge, fully
discharge, then fully recharge the battery pack.
Charging the Battery Pack
A battery pack can charge whether the tablet PC is off or in use,
but it will charge faster when the tablet PC is off.
To charge the battery pack:
1. Insert the battery pack into the tablet PC.
2. Connect the tablet PC to an AC outlet or an optional
Automobile Power Adapter/Charger. The battery light
on the tablet PC is turned on.
3. Leave the tablet PC connected to external power until
the battery pack is fully charged. The battery light on the
tablet PC is turned off.
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Discharging the Battery Pack
Before you begin a full discharge, disable Hibernation.
To disable Hibernation:
1. Select Start > Control Panel > Power Options > Hibernate
tab.
2. Clear the Enable Hibernation check box.
3. Select Apply.
The tablet PC must remain on while the battery pack is being
discharged. The battery pack can discharge whether or not you
are using the tablet PC, but will discharge faster while the tablet
PC is in use.
■If you plan to leave the tablet PC unattended during the
discharge, save your work before beginning the discharge
procedure.
■If you use the tablet PC occasionally during the discharge
procedure and have set energy-saving timeouts, expect the
following performance from your system during the
discharge process:
❏The monitor will not turn off automatically.
❏Hard drive speed will not decrease automatically while
the tablet PC is idle.
❏System-initiated Standby will not occur.
To fully discharge a battery pack:
1. Select the Power Meter icon on the taskbar, or access the
Power Schemes tab by selecting Start > Control Panel >
Power Options > Power Schemes tab.
2. Make a note of the 2 settings in the Plugged In column and
the 2 settings in the Running on Batteries column so that you
can reset them after the calibration.
3. Use the drop-down lists to set the 4 options (2 in each
column) to Never.
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4. Select OK.
5. Disconnect the tablet PC from the external power source, but
do not turn off the tablet PC.
6. Run the tablet PC on battery power until the battery pack is
fully discharged. The battery light begins to blink 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 tablet PC shuts down.
Recharging the Battery Pack
To recharge the battery pack:
1. Connect the tablet PC to external power and maintain the
connection until the battery pack is fully recharged. The
battery light on the tablet PC is turned off.
You can use the tablet PC while the battery pack is recharging
but the battery pack will charge faster if the tablet PC is off.
2. If the tablet PC is off, turn it on when the battery pack is fully
charged and the battery light is turned off.
3. Access the Power Schemes tab by selecting Start > Control
Panel > Power Options > Power Schemes tab.
4. Refer to the settings you recorded earlier. Reenter the settings
that you recorded for the items in the Plugged In column and
the Running on Batteries column.
5. Select OK.
ÄCAUTION: After calibrating the battery pack, reenable Hibernation.
Failure to reenable Hibernation may result in a complete battery drain and
potential data loss.
To reenable Hibernation, select Start > Settings > Control Panel >
Power Options > Hibernate tab. Select the Enable Hibernation
check box, and then select Apply.
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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
tablet PC from a single charge.
Conserving Power As You Work
To conserve power as you use the tablet PC:
■Turn off wireless and local area network (LAN) connections
and exit modem applications when you are not using them.
■Disconnect external devices you are not using that are not
connected to an external power source.
■Stop or remove a PC Card you are not using. For more
information, refer to Chapter 6, “Hardware Components.”
■Use the fn+f9 and fn+f10 hotkeys to adjust screen brightness
as you need it.
■Use optional powered speakers instead of the internal
speakers, or use the volume buttons to adjust system volume
as you need it.
■Turn off a device connected to the S-Video out jack by using
the fn+f4 hotkey or by turning off support for the device in
Windows.
■Run the tablet PC on external power while formatting a
diskette.
■If you leave your work, initiate Standby or Hibernation or
shut down the tablet PC.
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Selecting Power Conservation Settings
To set the tablet PC 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 > Display >
Screen Saver tab.
■Select a Power Scheme with low-power-use settings through
the operating system. Refer to the “Setting or Changing a
Power Scheme” section in this chapter.
Storing a Battery Pack
If a tablet PC will be unused and unplugged for more than
2 weeks, remove any battery packs and store them separately.
ÄCAUTION: To prevent damage to a battery pack, do not expose it to
high temperatures for extended periods of time.
High temperatures accelerate the self-discharge rate of a stored
battery pack. To prolong the charge of a stored battery pack, place
it in a cool, dry place.
Use the following table to estimate how long you can safely store
a battery pack. The storage times provided are based on a battery
pack that contains 50 percent of a full charge. A fully charged
battery pack can be safely stored for longer times; a battery pack
containing a lower charge can be safely stored for less time.
Calibrate a battery pack that has been stored for one month or
more before using it.
Temperature
Range °F Temperature
Range °C Safe Storage Time
115° to 140° 46° to 60° Less than 1 month
79° to 113° 26° to 45° No more than 3 months
32° to 77° 0° to 25° 1 year
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Disposing of a Used Battery Pack
ÅWARNING: There is a risk of fire and chemical burn if a battery pack
is handled improperly. Do not disassemble, crush, or puncture a battery
pack or short the contacts on a battery pack. Do not expose a battery
pack to temperatures higher than 60°C (140°F), or dispose of a battery
pack in water or fire.
When a battery pack has reached the end of its useful life, do not
dispose of it in general household waste.
■In Europe, dispose of or recycle battery packs by using the
public collection system or by returning them to HP, your
authorized HP service partners, or their agents.
■In other regions, refer to the Worldwide Telephone Numbers
booklet, included with the tablet PC, to contact Customer
Care and request information about battery pack disposal.
For more information about battery pack precautions and disposal
and the complete text of governmental agency notices, refer to the
Regulatory and Safety Notices guide on the Tablet PC
Documentation CD.
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