First Alert Battery Smoke Alarm SMI100 — White, Precision Detection, Front-Access Battery

The First Alert SMI100 Battery Smoke Alarm uses Precision Detection sensing technology to deliver reliable smoke detection while reducing false triggers and offering easy front-access battery replacement.

Designed for straightforward installation and everyday reliability, this battery-operated alarm meets updated industry performance standards. It balances sensitivity to real threats with filtration against common nuisance sources like cooking, and includes user-friendly features such as a test/silence button and an end-of-life warning to simplify maintenance.

How does the SMI100 reduce unwanted cooking and nuisance alarms?

The SMI100 incorporates First Alert’s Precision Detection advanced sensing which is tuned to distinguish between benign cooking particulates and the more concerning particles produced by smoldering or flaming fires. That means fewer false alarms without compromising the alarm’s ability to alert you to actual fire hazards.

• Precision Detection sensor algorithms minimize cooking-triggered alerts.
• Meets modern industry standards for improved alarm performance.
• Balanced sensitivity for both smoldering and fast-flame conditions.

What makes installation and battery maintenance easier?

This model is battery-operated for flexible placement anywhere in the home without wiring. The front-access battery compartment allows quick replacements without removing the unit from its mounting bracket, and a prominent test/silence button makes routine checks and temporary muting simple.

• Battery-powered design for easy mounting on ceilings or walls.
• Front-facing battery door for tool-free replacements.
• Test/silence button lets you confirm operation or temporarily silence false triggers.

What safety and end-of-life notifications are included?

The alarm provides an end-of-life warning to indicate when the device should be replaced, ensuring you don’t rely on an expired unit. Regular audible tests via the test button confirm the alarm and battery status, supporting ongoing home safety maintenance.

• Audible end-of-life signal alerts you when replacement is needed.
• Test button verifies alarm circuitry and battery condition.
• Simple user actions keep the unit functioning properly over time.

Where should I place this smoke alarm in my home?

Position alarms on every level, inside and outside sleeping areas, and in living rooms or near kitchens (but not directly above stovetops). Because it’s battery-powered, the SMI100 can be installed in locations without existing wiring, offering flexible coverage throughout the house.

• Install on each floor and outside bedrooms for comprehensive coverage.
• Avoid immediate proximity to cooking appliances to reduce nuisance triggers.
• Battery operation allows placement in attics, basements, or remodeled areas lacking hardwiring.

Who is this for: The First Alert SMI100 is well suited for homeowners, renters, and property managers seeking a dependable, easy-to-install smoke alarm with modern nuisance-reduction technology. If you want a low-maintenance unit with clear user controls, front access for battery changes, and industry-compliant sensing performance, this alarm delivers practical protection for everyday living spaces.