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Compaq nw9440 - Mobile Workstation, Manual

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Compaq nw9440 - Mobile Workstation Manual Download Page 39

Battery packs

Power

7–13

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 before first use. Calibrate the 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.

Summary of Contents for nw9440 - Mobile Workstation

Page 1: ...Power Document Part Number 396855 001 March 2006 This guide explains how the computer uses power ...

Page 2: ...upply is unavailable 3 5 When using wireless communication or readable or writable drive media 3 6 4 Default power settings Turning the computer or display on or off 4 2 Using emergency shutdown procedures 4 3 Initiating or resuming from standby 4 3 Initiating or restoring from hibernation 4 5 5 Power options Accessing Power Options Properties 5 1 Displaying the Power Meter icon 5 2 Setting or cha...

Page 3: ...Monitoring the charge of a battery pack 7 8 Managing low battery conditions 7 10 Identifying low battery conditions 7 10 Resolving low battery conditions 7 11 Calibrating a battery pack 7 13 When to calibrate 7 13 How to calibrate 7 13 Conserving battery power 7 18 Conserving power as you work 7 18 Selecting power conservation settings 7 19 Storing a battery pack 7 20 Disposing of a used battery p...

Page 4: ...1 Power control and light locations The following illustration and table identify and describe the power control and light locations Your computer may look slightly different from the illustration in this section ...

Page 5: ...cription 1 Power lights 2 On The computer is on Blinking The computer is in standby Blinking rapidly An HP Smart AC Adapter hereafter referred to as AC adapter with a higher power rating should be connected Off The computer is off or in hibernation Continued ...

Page 6: ...ull 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 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 ...

Page 7: ...d 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 Å Do not charge the computer battery pack on board aircraft Install or modify system software or write to a ...

Page 8: ...er 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 sys...

Page 9: ...rning on the computer Smart AC adapter power output is too low for this computer Clicking the message will display the following additional information The output power of the HP Smart AC Adapter connected to your computer is insufficient Please connect a higher capacity adapter For full performance connect a higher capacity AC adapter Clicking the message will display the following additional inf...

Page 10: ...rge 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...

Page 11: ...add or remove memory modules Do not insert or remove hard drives or optical drives Do not connect or disconnect external devices Do not insert or remove an external media card 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 p...

Page 12: ...our 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 Maint...

Page 13: ... 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 un...

Page 14: ...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 take one of the following actions Save your work and then initiate standby Initiate hibernation Shut down the computer ...

Page 15: ... DVD 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 drive medium such as a CD a DVD or an external media card Your playback may be interrupted You may se...

Page 16: ...fault standby hibernation and shutdown procedures For information about changing the function of some 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 ...

Page 17: ...the computer through the operating system by selecting Start Turn Off Computer Turn Off 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 compu...

Page 18: ...on for at least 5 seconds Disconnect the computer from external power and remove the battery pack For more information about removing and storing the battery pack refer to Battery packs Initiating or resuming from standby Task Procedure Result Initiate standby With the computer on press fn f3 In Windows XP Home select Start Turn Off Computer Stand by or In Windows XP Professional select Start Turn...

Page 19: ...ower settings and timeouts can be changed using Power Options in Windows Control Panel If the computer is equipped with an accelerometer select models only the computer will not initiate standby or hibernation and the display will be turned off The power lights blink The screen clears Resume from user initiated standby Press the power button The power lights are turned on Your work returns to the ...

Page 20: ... hibernation is enabled the Enable hibernation check box is selected Task Procedure Result Initiate hibernation In Windows XP Home select Start Turn Off Computer Then hold down the shift key as you select Hibernate In Windows XP Professional select Start Turn Off Computer Then hold down the shift key as you select Hibernate If hibernate is not displayed press the up or down arrow select Hibernate ...

Page 21: ...he 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 co...

Page 22: ...andby By default the display switch turns off the display and initiates standby The display switch is activated by closing the display If the computer is equipped with an accelerometer select models only the computer will not initiate standby or hibernation and the display will be turned off Accessing Power Options Properties To access Power Options Properties Right click the Power Meter icon in t...

Page 23: ...on 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 If yo...

Page 24: ...ht 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 T...

Page 25: ...nserve 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 Sta...

Page 26: ...ble 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 bas...

Page 27: ...ter is disconnected from the computer 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 ...

Page 28: ... the computer will be unused and disconnected from external power for more than 2 weeks remove the battery pack and store it as described in Storing a battery pack For more information about leaving your work refer to Standby and hibernation ÅWARNING To reduce potential safety issues only the battery pack provided with the computer a replacement battery pack provided by HP or a compatible battery ...

Page 29: ...hibernation or turn off the computer before removing the battery pack Battery packs may vary in appearance by model To insert a primary 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 into place ...

Page 30: ...urn the computer upside down on a flat surface with the battery bay facing you 2 Slide the right hand battery pack release latch 1 to the right 3 Slide and hold the left hand battery pack release latch 2 to the right 4 Remove the battery pack 3 from the computer ...

Page 31: ... fully charged the battery light is green The light is turned off when all battery packs are fully charged The primary battery pack charges when it is inserted into the computer and the computer is plugged into external power External power can be supplied through the following AC adapter included with the computer Optional docking device Optional power adapter ÅWARNING To reduce potential safety ...

Page 32: ...ms 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...

Page 33: ...y 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 i...

Page 34: ...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 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 bat...

Page 35: ...harge 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...

Page 36: ...omputer reaches a low battery condition the battery light blinks in 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 more 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...

Page 37: ... 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 included with the computer 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...

Page 38: ...te 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 ...

Page 39: ... 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 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 ...

Page 40: ... 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 ch...

Page 41: ...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 work 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 your system during the discha...

Page 42: ... 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 blink when the battery pack has discharged to a low battery condit...

Page 43: ...n 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 Power Schemes tab 4 Reenter the settings that you recorded for the items in the Plugged in column and the Running on batteries column 5 Click OK ÄCAUTION After calibrating the battery pack reenable hibernation Failure to reenable hibernation may ...

Page 44: ...sconnect external devices you are not using that are not plugged into an external power source Stop or remove any optional external media cards that you are not using Disable or remove an inserted digital card 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 adjust system volume as you need it Turn off a d...

Page 45: ...r 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 ...

Page 46: ...ld be used with the computer ÄCAUTION 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...

Page 47: ...e 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 this battery pack only with the battery pack approved for this computer Refer to the Regulatory Safety and Environmental Notices for battery disposal information ...

Page 48: ... 10 monitoring charge 7 8 recharging 7 17 removing 7 3 storing 7 20 using 7 1 battery pack release latch 7 4 button power standby 1 3 C calibration battery 7 13 charging battery packs 7 6 conservation power 7 18 critical low battery condition 7 10 D default power settings 4 1 drive media 3 6 E emergency shutdown procedures 4 3 F fn f3 hotkey 1 3 4 3 H hibernation defined 3 1 enabling disabling 3 3...

Page 49: ...ower lights 1 2 Power Meter icon 5 2 power settings 4 1 power supply 3 5 R readable media 3 6 release latch battery pack 7 4 reset emergency shutdown procedures 4 3 S screen saver 7 19 shutdown procedures 4 3 shutting down 4 2 software Power Meter 5 1 standby defined 3 1 initiating 4 3 resuming from 4 3 T temperature storage battery pack 7 20 traveling with the notebook battery pack temperature co...

Page 50: ...hange 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 Power First Edition March 2006 Document Part Number 396855 001 ...

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