Panasonic CF-M34 Series Toughbook Reference Manual page 23

Battery Power
Remaining Battery Level Confirmation by Alarm
The computer can be set to notify of a low battery level, etc. using the following menu.
When the battery level goes down to the level specified, the computer sets off an alarm
and displays a message indicating the low battery level.
Windows 2000
[Control Panel] - [Power Options] - [Alarms]
Windows XP
[Control Panel] - [Performance and Maintenance] - [Power Options] - [Alarms]
Set the value for the [Critical battery alarm] to 3% or more. This is necessary for the
standby or hibernation function to be completed (assuring data is saved) when the
battery level is low.
When making a setting for [When the alarm goes off, the computer will:] in [Alarms]-
[Alarm Action], add a check mark for [Force standby or shutdown even if a program
stops responding.].
If the computer shuts down or enters the standby or hibernation mode by the Alarm
settings function, start up the computer or resume operations after connecting the
AC adaptor. If the computer starts up or resumes while the AC adaptor is not con-
nected, Windows may not operate properly or alarm operations may stop working.
When remaining battery capacity falls to 9%, a beep will sound irrespective of the
alarm settings.
When disabling the speakers pressing Fn + F4 , the alarm beep is also disabled.
When the Remaining Battery Charge Becomes Low
Save your data and power off your computer
Following that:
Plug in the AC adaptor, and fully charge your battery.
Use a spare battery if you have one.
In the standby mode, do not remove/change the battery pack.
If you have neither the AC adaptor nor an extra battery, power the computer off.
About High Temperature Mode
This computer has a high temperature mode function that prevents the degradation of
the battery in high temperature environments.
We recommend setting the high temperature mode function when installing the computer
in a car, etc. To do this, set [Environment] in the [Main] menu of the Setup Utility to [High
Temperature]. In the high temperature mode, the full charge capacity of battery becomes
approximately 65%. In the case of a refreshed battery, the full charge capacity will be
65%. But if a battery has not been refreshed for a long time, it may be below 65%.
NOTE
In the high temperature mode, recharging will start only when the remaining capac-
ity of the battery is less than the full charge capacity minus 5%, after the battery has
been fully charged.
If full charge capacity is below 50% in the high temperature mode
The battery should be refreshed. ( page 24)
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