Panasonic CF-20 Series Operating Instructions And Reference Manual page 43

*1: Not equipped or no battery power.
During battery replacement, the LCD backlight turn off.
In the following cases, the tablet will turn the power off after detaching the tablet from the keyboard base (regardless of the presence of
n
the bridge battery).
The tablet that is not inserted battery pack.
The battery power of tablet is 5% or less.
C A U T I O N