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BACKUP BATTERY
If the power fails or you unplug the 7500AI, a 9V backup battery would save
the messages and the settings for the day, time and security code. We
recommend you use an alkaline battery.
Follow these steps to install the backup battery.
1. Use a Phillips screwdriver to
remove the screw on the
compartment cover.
2. Push down the latch to release
the battery compartment cover.
3. Snap the battery’s contacts firmly to the
battery connector, then
place the battery into the compartment.
4. Replace the cover and secure it with the
screw.
INSTALLATION
8
INSTALLATION
Disconnect the telephone line and power line cords before replacing the battery.
Always use a new 9V battery for optimum performance.
Dispose of old battery promptly and properly.