HP ProBook 5220m HP ProBook Notebook PC User Guide - Windows Vista - Page 75

Resolving a low battery level when the computer cannot exit Hibernation, Calibrating a battery

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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. 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 Maintenance > 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. Using battery power 63

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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.
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 Maintenance
>
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
.
Using battery power
63