Panasonic CF-T2 Series Reference Manual page 40

Battery Power
Check the Number of Lighting LED Indicators
(When the power is off or in standby/hibernation mode)
You can view the remaining battery capacity using the following procedure.
1
Close the display and confirm that the latch is locked.
2
Disconnect the AC adaptor.
3
Slide the power switch (A) and check the number of lighting LED
indicators (B).
The number of lighting LED indicators (B)
0
1
2
3
4
5
Remaining Battery Capacity
0 % - 4 %
5 % - 24 %
25 % - 49 %
50 % - 74 %
75 % - 94 %
95 % - 100 %
40