First Alert SMICO110, 10-Year Battery Combination Smoke & Carbon Monoxide Alarm, 1-Pack
First Alert · 3 more picks →
Best for
Best 10-year sealed battery
Amazon rating
Amazon aggregate, one input among many in the Verdict Score
Current price
$35.75
Updated Jun 27, 2026 · 1 min read
The consensus
What reviewers found
Synthesized across the trust-weighted source mix below.
Across verified-purchase reviewers, this First Alert combination smoke-and-CO alarm with a 10-year sealed battery earns a 4.3 average over roughly 380 ratings. Its appeal is the maintenance-free decade of operation without battery swaps, packaged in a single combo unit that covers both hazards. No independent expert testing, specialist-community threads, or video reviews were present in the supplied signals, so the verdict relies on customer ratings.
What reviewers liked
- 10-year sealed battery means no battery replacements
- Single-unit smoke and CO coverage
- Steady verified-purchase rating across 382 reviews
Where it falls short
- 4.3 average trails the top-rated combo pick in the pool
- Sealed unit must be fully replaced at end of life
- No independent expert or community testing in the supplied data
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Across verified-purchase reviewers, this First Alert combination smoke-and-CO alarm with a 10-year sealed battery earns a 4.3 average over roughly 380 ratings. Its appeal is the maintenance-free decade of operation without battery swaps, packaged in a single combo unit that covers both hazards.
No independent expert testing, specialist-community threads, or video reviews were present in the supplied signals, so the verdict relies on customer ratings. The 4.3 average sits slightly below the better-rated combo multipack in this pool, and as a combination unit the whole detector retires when its earliest sensor expires. For buyers who want a set-and-forget single alarm, the customer consensus is solid if not standout.
- First Alert's Precision Detection advanced sensing technology complies with new industry standards to reduce cooking nuisance alarms and provides early warning in the event of a home fire emergency.
- 10-Year sealed battery eliminates battery replacements and low battery chirps for the life of the alarm
- End-of-life warning lets you know when it’s time to replace the alarm
- Provides reliable 2-in-1 protection against both smoke and carbon monoxide in an easy to install alarm
- Test/silence button for efficient testing to ensure alarm is working properly
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