Panasonic CF-73 Series Reference Manual page 25

Battery Power
Accurately Displaying Battery Capacity
The battery pack has a function for measuring, storing and learning about battery capacity.
Using this function properly to accurately display remaining battery capacity requires 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, then 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 discharged. It takes
approximately 3 hours* until the power automatically goes off through the com-
plete 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 hours*.
* When the second battery has been inserted in addition to the main battery: approximately 6
hours
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