Panasonic Toughbook CF-18BCAGCMM Reference Manual page 44

Battery Power
When the Remaining Battery Charge Becomes Low
The following is factory default setting.
When remaining battery capacity falls to
10%
[Low battery alarm]
Displays a message indicating the low
battery level.
Charge your battery.
Connect the AC adaptor immediately. If
you do not have the AC adaptor with you,
exit any programs currently running, then
exit Windows, and confirm that the power
indicator is off.
If you have a fully charged spare battery,
turn off the computer, replace the battery,
and turn the computer on again.
Do not replace the battery pack while the computer is in standby mode. This will cause
unsaved data to be lost.
Above settings can be changed.
A
Display [Alarms] screen.
Select [start] - [Control Panel] - [Performance and Maintenance] - [Power
Options] - [Alarms].
When remaining battery capacity falls to 5%
[Critical battery alarm]
Displays a message indicating the low
battery level and the computer will enter
hibernation mode.
Connect the AC adaptor or replace the
battery pack before starting up the computer
next time.
Connect the AC adaptor, then charge the
battery.
If you have a fully charged spare battery,
turn off the computer, replace the battery
pack, and turn the computer on again.
After the computer enter hibernation
mode when the battery runs down, if
computer operations are resumed
without charging the battery, Windows
may not start up properly, and in some
cases the alarm function may not operate
properly from that point on.
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