Panasonic KX-TG4000B User Manual

Page of 108
12
Installation
The battery cannot be overcharged.
If the backup battery has been discharged during a power failure, the unit will not
work. If required, you can connect a standard telephone on the same line. See
page 91.
BATTERY Indicator:
The BATTERY indicator lights while
the battery is being charged.
During a power failure (or if the AC
adaptor is disconnected), the
BATTERY indicator shows the
battery strength:
Full to Medium: The indicator lights.
Low: The indicator flashes.
No power: The indicator light is off.
Installing the Backup Battery in the Base Unit
A rechargeable Ni-Cd battery works as emergency power during a power
failure. The fully charged backup battery provides the base unit with a
minimum of 20 minutes operation. The battery is charged in the base unit
while the AC adaptor is connected (p. 13). It takes about 10 hours to
charge fully.
1
Open the battery cover.
2
Install the backup battery 
in the battery compartment.
Close the battery cover.
BATTERY Indicator