Remove the old battery.
First alert smoke detector battery change.
Deactivate the bracket lock use a flathead screwdriver and place it in between the unit s mounting bracket and the mounting bracket pin.
How to replace an alarm battery.
Open the battery drawer.
The battery in 10 year alarms last for the life of the alarm eliminating the need for battery replacements.
Buy a 10 year sealed battery smoke alarm.
We also offer hardwire alarms with a battery backup for protection during power outages.
The first step is to remove the smoke alarm from the mounting bracket.
If the unit is locked onto the bracket you will have to deactivate the bracket lock.
Press and hold the test reset button for 10 seconds to fully discharge the detector.
These alarms also have an end of life warning to remind you to replace the alarm after 10 years.
Remove the old batteries.
When installing the battery.
Insert the new batteries and make sure the contact points are.
Look at your 9v battery to identify the positive and negative contacts similar to what is shown in the image.
Use the plastic tab to gently open the battery compartment.
How to change batteries in first alert alarms number of views 45 18k minimum installation requirements for models 1042135 or 1042136 onelink smart smoke co alarm.
At first alert we are committed to creating reliable products that help protect your home and family.
How to replace a 9v battery.
What smoke alarm do you have.
The national fire protection association nfpa recommends changing the batteries in your smoke alarm every 6 months.