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Resolving a low battery level, Calibrating a battery, Step 1: fully charge the battery – HP EliteBook 2540p Notebook PC User Manual

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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.

Using battery power

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