Panasonic Toughbook CF-29LCQGCBM Reference Manual page 43

Battery Power
Accurately Displaying Battery Capacity (Battery Recalibration)
B
Set alarm operations and remaining battery level for operating alarm functions.
When disabling the speaker by pressing Fn+F4, the sound alarm is also
disabled.
A. When making a setting for [When the alarm goes off, the computer will] in
[Alarms] - [Alarm Action]:
Add a check mark for [Force stand by or shutdown even if a program stops
responding.].
B. Set the value for [Critical battery alarm] to 5% or more.
This is necessary for the standby or hibernation function to be completed
(assuring data is saved) when the battery level is low.
The battery pack has a function for measuring, storing and learning about battery capacity.
Using the Battery Recalibration function to accurately display remaining battery capacity
requires that the battery pack be fully charged (charged to 100%), then fully discharged. This
procedure should be performed once after you purchase the computer. As you use the
battery pack over a long period of time, the remaining capacity display may become
inaccurate due to aging of the battery pack and other factors. The following procedure
should be performed again.
NOTE
Perform the following procedure in a temperature range of 10
°
86 F}.
The Battery Recalibration function takes time to execute because of the large battery
capacity; this is not a malfunction.
• Time taken to obtain a full charge: Approx. 4.5 hours [max.] (main battery + second
battery: Approx. 7 hours [max.])
• Time taken for a complete discharge: Approx. 5 hours (main battery + second
battery: Approx. 7.5 hours)
If the computer is turned off while performing Battery Recalibration (electrical power
outage, accidental removal of the AC adaptor or battery pack, etc.), Battery
Recalibration will not be performed properly.
43
° ° °
C to 30 C {50 F to