How To Know When To Change Fire Alarm Battery. Replace the backup battery. A good rule of thumb is to change it when the clocks change in the fall and spring.
Where you need to change the battery DFES recommends you do this on April 1st. If you need to change the battery. Change the detectors battery as directed by the smoke detector instruction manual.
Make sure the battery is firmly engaged.
If you need any help in choosing the best option just let us know. For a long-life battery detector test the alarm monthly and replace. We carry a wide range of products and have a straightaway availability for our top selling smoke detectors such as the Simplex 4098-9714. Otherwise replace the top.
