HP Probook 6450 B User Guide

							3.Remove the battery from the computer (2).
Charging a battery
WARNING!Do not charge the computer battery while you are onboard aircraft.
The battery charges whenever the computer is plugged into external power through an AC adapter, an
optional power adapter, or an optional docking device.
The battery charges whether the computer is off or in use, but it charges faster when the computer is
off.
Charging may take longer if a battery is new, has been unused for 2 weeks or more, or is much warmer
or cooler than room temperature.
To prolong battery life and optimize the accuracy of battery charge displays, follow these
recommendations:
●If you are charging a new battery, charge it fully before turning on the computer.
●Charge the battery until the battery light turns off.
NOTE:If the computer is on while the battery is charging, the battery meter in the notification
area may show 100 percent charge before the battery is fully charged.
●Allow the battery to discharge below 5 percent of a full charge through normal use before charging
it.
●If the battery has been unused for one month or more, calibrate the battery instead of simply
charging it.
The battery light displays charge status:
●Amber: A battery is charging.
●Turquoise: A battery is close to full charge capacity.
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							●Blinking amber: A battery that is the only available power source has reached a low battery level.
When the battery reaches a critical battery level, the battery light begins blinking rapidly.
●Off: If the computer is plugged into an external power source, the light turns 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 level.
Maximizing battery discharge time
Battery discharge time varies, depending on the features you use while on battery power. Maximum
discharge time gradually shortens as the battery storage capacity naturally degrades.
Tips for maximizing battery discharge time:
●Lower the brightness on the display.
●Check the Power saver setting in Power Options.
●Remove the battery from the computer when it is not being used or charged.
●Store the battery in a cool, dry location.
Managing low battery levels
The information in this section describes the alerts and system responses set at the factory. Some low-
battery alerts and system responses can be changed using Power Options in Windows Control Panel
(Start > Control Panel > System and Security > Power Options). Preferences set using Power
Options do not affect lights.
Identifying low battery levels
When a battery that is the sole power source for the computer reaches a low battery level, the battery
light blinks.
If a low battery level is not resolved, the computer enters a critical battery level, and the battery light
blinks rapidly.
The computer takes the following actions for a critical battery level:
●If Hibernation is enabled and the computer is on or in the Sleep state, the computer initiates
Hibernation.
●If Hibernation is disabled and the computer is on or in the Sleep state, the computer remains briefly
in the Sleep state, and then shuts down and loses any unsaved information.
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							Resolving a low battery level
CAUTION:To reduce the risk of losing information when the computer reaches a critical battery level
and has initiated Hibernation, do not restore power until the power lights turn off.
Resolving a low battery level when external power is available
▲Connect one of the following devices:
●AC adapter
●Optional docking device
●Optional power adapter
Resolving a low battery level when a charged battery is available
1.Turn off the computer or initiate Hibernation.
2.Remove the discharged battery, and then insert a charged battery.
3.Turn on the computer.
Resolving a low battery level when no power source is available
▲Initiate Hibernation.
– or –
Save your work and shut down the computer.
Resolving a low battery level when the computer cannot exit Hibernation
When the computer lacks sufficient power to exit Hibernation, follow these steps:
1.Insert a charged battery or plug the computer into external power.
2.Exit Hibernation by briefly pressing the power button.
Calibrating a battery
Calibrate a battery under the following conditions:
●When battery charge displays seem inaccurate
●When you observe a significant change in battery run time
Even if a battery is heavily used, it should not need to be calibrated more than once a month. It is also
not necessary to calibrate a new battery.
Step 1: Fully charge the battery
WARNING!Do not charge the computer battery while you are onboard aircraft.
NOTE:The battery charges whether the computer is off or in use, but it charges faster when the
computer is off.
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							To fully charge the battery:
1.Insert the battery into the computer.
2.Connect the computer to an AC adapter, optional power adapter, optional expansion product, or
optional docking device, and then plug the adapter or device into external power.
The battery light on the computer turns on.
3.Leave the computer plugged into external power until the battery is fully charged.
The battery light on the computer turns off.
Step 2: Disable Hibernation and Sleep
1.Click the battery meter icon in the notification area, and then click More power options.
– or –
Select Start > Control Panel > System and Security > Power Options.
2.Under the current power plan, click Change plan settings.
3.Record the Turn off the display and Put the computer to sleep settings listed in the On
battery column so that you can reset them after the calibration.
4.Change the Turn off the display and Put the computer to sleep settings to Never.
5.Click Change advanced power settings.
6.Click the plus sign next to Sleep, and then click the plus sign next to Hibernate after.
7.Record the On battery setting under Hibernate after so that you can reset it after the calibration.
8.Change the On battery setting to Never.
9.Click OK.
10.Click Save changes.
Step 3: Discharge the battery
The computer must remain on while the battery is being discharged. The battery can discharge whether
or not you are using the computer, but the battery will discharge faster while you are using it.
●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.
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							To discharge a battery:
1.Unplug the computer from its external power source, but do not turn off the computer.
2.Run the computer on battery power until the battery is discharged. The battery light begins to blink
when the battery has discharged to a low battery level. When the battery is discharged, the battery
light turns off and the computer shuts down.
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							Step 4: Fully recharge the battery
To recharge the battery:
1.Plug the computer into external power and maintain external power until the battery is fully
recharged. When the battery is recharged, the battery light on the computer turns off.
You can use the computer while the battery is recharging, but the battery will charge faster if the
computer is off.
2.If the computer is off, turn it on when the battery is fully charged and the battery light has turned
off.
Step 5: Reenable Hibernation and Sleep
CAUTION:Failure to reenable Hibernation after calibration may result in a full battery discharge and
information loss if the computer reaches a critical battery level.
1.Click the battery meter icon in the notification area, and then click More power options.
– or –
Select Start > Control Panel > System and Security > Power Options.
2.Under the current power plan, click Change plan settings.
3.Reenter the settings that you recorded for the items in the On battery column.
– or –
Click Restore default settings for this plan, and then follow the on-screen instructions.
NOTE:If you restore default settings, omit steps 4 through 8.
4.Click Change advanced power settings.
5.Click the plus sign next to Sleep, and then click the plus sign next to Hibernate after.
6.Reenter the setting that you recorded for On battery.
7.Click OK.
8.Click Save changes.
Conserving battery power
●Select the Power saver power plan through Power Options under System and Security in
Windows Control Panel.
●Turn off wireless and local area network (LAN) connections and exit modem applications when you
are not using them.
●Disconnect external devices that are not plugged into an external power source, when you are not
using them.
●Stop, disable, or remove any external media cards that you are not using.
●Use the fn+f9 and fn+f10 hotkeys to adjust screen brightness as needed.
●If you leave your work, initiate Sleep or Hibernation, or shut down the computer.
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							Storing a battery
CAUTION:To prevent damage to a battery, 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 and store it separately.
To prolong the charge of a stored battery, place it in a cool, dry place.
NOTE:A stored battery should be checked every 6 months. If the capacity is less than 50 percent,
recharge the battery before returning it to storage.
Calibrate a battery before using it if it has been stored for one month or more.
Disposing of a used battery
WARNING!To reduce the risk of fire or burns, do not disassemble, crush, or puncture; do not short
external contacts; do not dispose of in fire or water.
Refer to the Regulatory, Safety and Environmental Notices for battery disposal information. These
notices are located in Help and Support.
Replacing the battery 
Computer battery life varies, depending on the power management settings, programs running on the
computer, display brightness, external devices connected to the computer, and other factors.
Battery Check notifies you to replace the battery when an internal cell is not charging properly, or when
the battery storage capacity has reached a “weak” condition. A message refers you to the HP Web site
for more information about ordering a replacement battery. If the battery is possibly covered by an HP
warranty, instructions include a warranty ID.
NOTE:To ensure that you always have battery power when you need it, HP recommends purchasing
a new battery when the storage capacity indicator turns green-yellow.
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							Testing an AC adapter
Test the AC adapter if the computer exhibits any of the following symptoms:
●The computer will not turn on when connected to the AC adapter.
●The display does not turn on when the computer is connected to the AC adapter and external
power.
●The power lights are off when the computer is connected to the AC adapter.
To test the AC adapter:
1.Remove the battery from the computer.
2.Connect the AC adapter to the computer and to an AC outlet.
3.Turn on the computer.
●If the power lights turn on, the AC adapter is functioning properly.
●If the power lights remain off, the AC adapter is not functioning and should be replaced.
Contact technical support for information on obtaining a replacement AC power adapter. Select
Start > Help and Support > Get assistance.
Shutting down the computer
CAUTION:Unsaved information will be lost when the computer is shut down.
The Shut down command closes all open programs, including the operating system, and then turns off
the display and computer.
Shut down the computer under any of the following conditions:
●When you need to replace the battery or access components inside the computer
●When you are connecting an external hardware device that does not connect to a USB port
●When the computer will be unused and disconnected from external power for an extended period
Although you can shut down the computer with the power button, the recommended procedure is to use
the Windows Shut down command.
To shut down the computer, follow these steps:
NOTE:If the computer is in the Sleep state or in Hibernation, you must first exit Sleep or Hibernation
before shutdown is possible.
1.Save your work and close all open programs.
2.Click Start.
3.Click Shut down.
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							If the computer is unresponsive and you are unable to use the preceding shutdown procedures, try the
following emergency procedures in the sequence provided:
●Press and hold the power button for at least 5 seconds.
●Disconnect the computer from external power and remove the battery.
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							6Drives
Identifying installed drives
Your computer includes a hard drive (with a rotating disc) or a solid-state drive (SSD) with solid-state
memory. Because it has no moving parts, an SSD does not generate as much heat as a hard drive.
To view the drives installed on the computer, select Start > Computer.
NOTE:Windows includes the User Account Control feature to improve the security of your computer.
You may be prompted for your permission or password for tasks such as installing applications, running
utilities, or changing Windows settings. Refer to Help and Support for more information.
Handling drives
Drives are fragile computer components that must be handled with care. Refer to the following cautions
before handling drives. Additional cautions are included with the procedures to which they apply.
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