Fire Alarm Batteries

Fire alarm batteries keep your fire alarm control panel, power supplies and notification circuits running when AC power fails. Most commercial fire alarm panels use two 12V sealed lead acid (SLA) batteries wired in series for 24V standby power, sized to cover 24 hours of standby plus 5 to 15 minutes of alarm as required by NFPA 72.

Common fire alarm battery sizes

• 12V 7Ah and 8Ah: small conventional and addressable panels, remote power supplies and dialers.
• 12V 12Ah: mid-size panels and NAC power extenders.
• 12V 18Ah: larger addressable panels and panels with many notification devices.
• 12V 26Ah to 100Ah: large systems, voice evacuation and BDA/DAS radio systems. These often need an external battery cabinet.

How to choose a replacement fire alarm battery

Match the voltage and amp-hour (Ah) rating on the old battery or on the panel's battery calculation, and check the terminal type (F1, F2, nut and bolt). Replace both batteries of a 24V pair at the same time, and replace SLA batteries every 3 to 5 years or when they fail a load test.

Shop 12V fire alarm batteries from Power Sonic, Yuasa, Casil and other brands, plus manufacturer batteries for Notifier, Simplex, Edwards and Fire-Lite systems.