Panasonic KX-T336 System Reference Manual page 142

6. When one or two Expansion Shelves (KX-T336200)
are installed, connect another Battery Adaptor (KX-
A26D) with automobile type batteries (12V DC
following the same procedures from 1 to 5.
Note :
Up to three pairs of automobile-type batteries can be connected to the KX-T336 System.
If power failure occurs, each pair of batteries supplies the power to each shelf (Basic,
Expansion 1, 2) connected respectively via Battery Adaptor (KX-A26D).
×
2)
Automobile type
batteries (24V DC)
2-C-34