Replacement cells in this category are for smoke alarms with removable batteries. Check the alarm’s label or instructions before choosing a replacement, since the required type and voltage depend on the model. A correctly specified battery helps the alarm operate as intended.

Smoke alarm products

A small smoke alarm may suit a location where mounting space is limited, but size alone does not confirm that a model is suitable. Check its dimensions, power source and installation requirements against the room and project brief. Confirm that the proposed location and alarm meet the requirements that apply to the building.

How do I check if a 9v battery for smoke alarm use is suitable?

Check the alarm’s label or instructions for the required battery type and voltage. Do not assume a 9V battery will suit every model.

When should I replace a smoke alarm battery?

Follow the alarm manufacturer’s replacement guidance, and fit the specified battery type. Check the alarm after replacement using its test function.

What should I check when choosing a small smoke alarm?

Compare the product dimensions with the available mounting space, then check its power source and installation requirements against the project brief.