Panasonic CF-Y2 Series Reference Manual page 32

Battery Power
Press the Fn+F9 key to Check the Remaining Battery Power on the Screen
(After logging on to Windows)
Check the Remaining Battery Power and Remaining Time using the Windows Power
Meter (After logging on to Windows)
When the battery pack is inserted in the computer (example)
When the battery pack is not inserted in the computer
Display by double-clicking the
connected.
The remaining battery power and remaining time indicated are calculated based on the
computer's usage conditions at that time, so these displays may change when usage
conditions change. (These displays are only a guide)
icon on the notification area when the AC adaptor is not
32