Resolving A Low Battery Level - HP EliteBook 2740p User Manual

Resolving a low battery level

CAUTION:
and has initiated Hibernation, do not restore power until the power lights turn off.
Resolving a low battery level when external power is available
Resolving a low battery level when a charged battery is available
1.
2.
3.
Resolving a low battery level when no power source is available
Resolving a low battery level when the computer cannot exit Hibernation
When the computer lacks sufficient power to exit Hibernation, follow these steps:
1.
2.
Calibrating a battery
Calibrate a battery under the following conditions:
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:
computer is off.
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To reduce the risk of losing information when the computer reaches a critical battery level
Connect one of the following devices:
AC adapter
Optional expansion product or docking device
Optional power adapter
Turn off the computer or initiate Hibernation.
Remove the discharged battery, and then insert a charged battery.
Turn on the computer.
Initiate Hibernation.
– or –
Save your work and shut down the computer.
Insert a charged battery or plug the computer into external power.
Exit Hibernation by briefly sliding the power switch to the right.
When battery charge displays seem inaccurate
When you observe a significant change in battery run time
Do not charge the computer battery while you are onboard aircraft.
The battery charges whether the computer is off or in use, but it charges faster when the
Using battery power 71