Panasonic KX-NS500 - Page 119

2. Connect the Back-up Battery Cable to a set of 3 identical backup batteries.
Backup Batteries (VRLA 12 V DC x 3)
Red
Black
Battery Connector
Fuse
Battery Switch
Back-up Battery Cable
Battery Connector Cover
Connecting Backup Batteries (Type B)
1. Turn off the power switch on the back side.
2. Connect the Back-up Battery Cable to a set of 3 identical backup batteries.
Backup Batteries (VRLA 12 V DC x 3)
Red
Black
Battery Connector
Fuse
Back-up Battery Cable
Battery Connector Cover
Installation Manual 119
4.2.12 Backup Battery Connection