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