Panasonic Toughbook CF-50 Series Reference Manual page 21

Battery Power
Accurately Displaying Battery Capacity
The battery pack has a function for measuring, storing and learning about battery ca-
pacity. Using this function properly to accurately display remaining battery capacity re-
quires that the battery pack be fully charged (charged to 100%), then fully discharged,
and then fully charged again.
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 procedure described
below should be performed again.
NOTE
If the computer is turned off while refreshing the battery (electrical power outage,
accidental removal of the AC adaptor or battery pack, etc.), the battery will not be
refreshed correctly.
1
Attach the battery pack and connect the AC adaptor
Remove all peripherals (except for the battery pack and AC adaptor).
2
Use the "Refresh Battery" utility to fully discharge the battery
pack
1 Run the Setup Utility. (
2 Select [Refresh Battery] from [Exit] menu and press Enter .
3 At the confirmation message, select [Yes] and press Enter .
Once the battery indicator turns green, the battery pack will be completely dis-
charged. It takes approximately 2.5 hours until the power automatically goes off
through the complete discharge of the battery from the fully charged state.
3
Allow the battery pack to charge until the battery indicator turns
green
Charging Time: Approximately 3.5 hours.
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