Resolving A Low Battery Level When A Charged Battery Is Available; Resolving A Low Battery Level When No Power Source Is Available; Resolving A Low Battery Level When The Computer Cannot Exit Hibernation; Calibrating A Battery - HP ProBook 6450b - Notebook PC User Manual

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!
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.
72 Chapter 5 Power management
Do not charge the computer battery while you are onboard aircraft.