We have created this handy tool to help you find out which battery size is correct for the fire alarm you are fitting,
the calculations used are correct and up to date to comply with British standards - BS5839.
Simply fill in your quiescent load (standby load) and alarm load (both in milliamps) and then your standby period in hours
to accurately calculate the minimum battery size required for the panel.
Our Battery Size Calculator is now available on Android! You can download the app from
Google Play store, or download it directly from our website using
the download button below on your Android device.
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Load test - Battery Size Calculator - Fire Panel - Fire Panel Battery Calculator - Battery Calculator