Click here to learn more about replacing your battery or to order a new one. Your Battery Backup Unit (BBU) provides power for Voice services for up to 8 hours if an active battery is inserted into the unit. How Do I Change the Battery in the Battery Backup Unit? For those customers who want to stop the beeping/chirping from their BBU before replacing the battery, press the Alarm Silence button (available on some models) that turns off the alarm.

If the beeping continues after the power has been restored, the battery may need to be replaced. Once commercial power has been restored, the battery should recharge itself and the beeping should stop. When the battery in the Battery Backup Unit (BBU) needs to be changed, the ONT will begin to beep or chirp – this is just a warning letting you know that the battery will soon lose its charge. After you press the Battery Emergency Use button, the BBU will operate until the battery has completely drained. This should enable the ONT to reboot and provide up to one hour of talk time. If you need to make an emergency phone call after the BBU has shut down, press the Battery Emergency Use button on the ONT. The BBU will shut down approximately one hour before that battery has completely drained. You must maintain an active battery in the Battery Backup Unit (BBU) for it to function. How do I Make an Emergency Call after the Battery Backup Unit Shuts Down? Please contact your local power company to report a power outage. If you lose power, your Fios and Business Internet services will be affected until power is restored. Extreme weather event forecasted that could cause outages of Verizon services in your area.

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