What is the minimum duration a secondary rechargeable battery must operate the system in alarm mode?

The minimum duration that a secondary rechargeable battery must operate the system in alarm mode is set at a standard duration to ensure reliability during an emergency. A battery life of 4 minutes is considered the minimum requirement in industry codes and standards. This duration allows for an effective response time during a power outage or failure, giving users enough time to address the alarm situation or to ensure that help can be summoned.

A duration of 4 minutes strikes a balance between being sufficiently robust to handle a brief period of power loss while not requiring overly large or heavy battery systems that may complicate installation or maintenance. This standard is designed to ensure safety and effectiveness while facilitating practicality in the design of alarm systems. Overall, adherence to this duration is crucial for the performance and reliability of security systems in real-world scenarios.