Smoke alarm with circular white plastic housing, central push-button and battery compartment; shows a green power indicator near vent slots, photographed close-up against a plain white background.
This product has been Discontinued

Firex Hardwired Smoke Alarm

i4618AC

The Kidde i4618 is an AC/DC powered, ionization smoke alarm that operates on a 120V power source with 9V battery backup. This alarm uses ionization sensing technology.

  • Provides a Hush™ feature to quickly silence nuisance alarms

  • Alarm memory flashes red LED indicating which unit was the initiating alarm in interconnected system

  • Battery backup provides protection in case of power failure

  • Interconnectable with up to 24 devices (of which 18 can be initiating) including smoke, CO and heat alarms

Helpful Resources

Upgrade to

This model is to be replaced with Smoke Alarm, Hardwired with AA Backup Battery

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A round Kidde smoke alarm shows a steady green LED, its vents and red/black wiring visible; photographed close-up against a dark background, suggesting ceiling-mounted installation.View Product

Helpful Resources

Click on the video to learn more about how to install your Kidde Smoke alarm.

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A red fire extinguisher and three Kidde smoke/CO detectors (one boxed) stand arranged on a light wood tabletop against a pale wall, accompanied by a round "#1" safety-brand badge.

Why Kidde

As North America's #1 home fire safety brand,* Kidde has been working to help make your home the safest it can be for more than 100 years. Now, our latest smoke alarms and combination smoke + carbon monoxide (CO) alarms are bringing you the next level of fire and CO safety. Help protect what matters most in your life with features like cutting edge technology that send fast alerts to give your family more time to get out safely. And enhanced sensing technology that reduces false alarms often caused by cooking.

*Based on total household installations as of December 2023.