The battery in 10 year alarms last for the life of the alarm eliminating the need for battery replacements.
First alert smoke detector battery change.
We also offer hardwire alarms with a battery backup for protection during power outages.
How to replace a 9v battery.
Press and hold the test reset button for 10 seconds to fully discharge the detector.
The first step is to remove the smoke alarm from the mounting bracket.
Open the battery drawer.
What smoke alarm do you have.
If the unit is locked onto the bracket you will have to deactivate the bracket lock.
Insert the new batteries and make sure the contact points are.
When installing the battery.
The national fire protection association nfpa recommends changing the batteries in your smoke alarm every 6 months.
Choose the option that allows you and your family the most peace of mind.
Use the plastic tab to gently open the battery compartment.
Deactivate the bracket lock use a flathead screwdriver and place it in between the unit s mounting bracket and the mounting bracket pin.
These alarms also have an end of life warning to remind you to replace the alarm after 10 years.
Remove the old batteries.
Remove the old battery.
If it s locked you may need to remove the locking pin to open it.
Look at your 9v battery to identify the positive and negative contacts similar to what is shown in the image.
At first alert we are committed to creating reliable products that help protect your home and family.
How to replace an alarm battery.