Customer FAQs

Discover answers to the most frequently asked questions from ADT customers with the click of a button.

1. If I lose power, will my alarm system still work?

Yes. In case of a power loss, the back-up battery will activate and will operate your alarm system for several hours. In the event your system battery is or becomes low, a low-battery signal will be sent to ADT’s Customer Monitoring Center. Your system will also show an indication of the low battery by displaying a message (e.g., LOW BATT or BATT) on the keypad or frequently beeping.  

Learn what steps to take for a low-battery signal.


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