What is the minimum capacity requirement for a fire alarm battery to support a fire alarm panel?

The minimum capacity requirement for a fire alarm battery to support a fire alarm panel is 24 hours. This standard ensures that the fire alarm system can function without external power for an adequate period during a power outage or emergency situation. A 24-hour capacity allows for continuous operation, which is crucial for the system to provide timely alerts and perform its fire detection and notification functions effectively. This requirement is based on fire safety standards that prioritize the reliability and operability of fire alarms in emergency scenarios, ensuring they remain operational even when power is compromised.