Remove the Cover

The first step is to find the place where can be opened, some smoke alarm s need screwdriver to open, but some not just use your fingers to open it.

Replace the Batteries

After you remover the cover, it is easy to find where is the battery.  Simply to remove the old battery and install the new one. 

Test the Smoke Alarm

Before you finish the installation, please make sure the batteries work. Press the test bottom for a few seconds, check if everything is good.