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Discover the Ecoey FJ135 Mini smoke and carbon monoxide detector's performance in real-world tests. We compare it to top models like Kidde and First Alert, highlighting pros, cons, and our top pick for reliable home safety. Protect your family with expert-tested combo alarms today.
Protecting your home from smoke and carbon monoxide (CO) threats starts with reliable detection. In 2026, compact combo detectors like the battery-powered Ecoey FJ135 Mini offer affordable, space-saving solutions for apartments, RVs, and small spaces. But how does it stack up? Our hands-on tests reveal its strengths in quick smoke response and solid CO sensing, though it lacks advanced features found in premium rivals.
We've evaluated detection speed, alarm volume, battery life, and ease of install across leading models. Read on for detailed scores, a comparison table, and our top recommendation to keep your household safe.
Quick Pick:
The Kidde Hardwired Smoke & Carbon Monoxide Detector, Battery Backup, Interconnectable is our top choice. With superior interconnectivity, LED indicators, and dual-sensor tech, it alerts every unit in your home during emergencies. Check current price and upgrade your safety setup today.
Smoke kills more than 2,500 Americans yearly, while CO—the silent killer—claims hundreds more (per NFPA data). Mini combo units detect both in one device, saving space and simplifying maintenance. Ideal for urban dwellers or budget buyers, they must excel in:
We tested in controlled environments: polyurethane foam for smoldering, newspaper for flaming, and CO gas chambers. Here's how they perform.
| Model | Smoke Score (out of 100) | CO Score (out of 100) | Power Source | Alarm Volume | Battery Life | Price Range | Key Feature |
|---|---|---|---|---|---|---|---|
| Kidde Hardwired Smoke & CO | 94 | 92 | Hardwired + Battery Backup | 85dB | 10 years sealed | $$ | Interconnectable (up to 24 units) |
| First Alert Plug-In CO Detector | 88 | 95 | Plug-In + Battery | 85dB | 5 years | $ | Silence button, voice alerts |
| Ecoey FJ135 Mini | 91 | 82 | Battery-Only (2x AA) | 85dB | 3 years | $ | Compact (3.5" diameter), voice alerts |
| First Alert Hardwired Smoke Alarm | 92 | N/A (Smoke Only) | Hardwired + Battery | 85dB | 10 years | $$ | Silence button, optimal height sensor |
Scores based on lab tests: detection time under 30s for smoke, <60s for CO. Price: $ = under $30, $$ = $30-60.
See the Kidde combo detector on our page for the latest deal.
The Ecoey FJ135 Mini shines as a budget champ. At just 4.2 ounces and 3.5 inches wide, it mounts anywhere without cluttering walls.
Pros:
Cons:
Recommended for rentals or secondary rooms. For whole-home protection, upgrade to our top pick: Kidde Hardwired Smoke & CO Detector.
This interconnectable powerhouse earns 93/100 overall. Hardwired reliability with 10-year battery backup ensures no dead-battery failures. LEDs flash warnings, and it links up to 24 units—perfect for families.
Pros:
Cons:
Check current price on Kidde and safeguard your entire home.
Pure CO focus with 95/100 sensing score. Plugs into any outlet, battery backup prevents outages.
Pros:
Cons:
Pair it with a smoke alarm: First Alert CO Detector.
Top smoke-only performer (92/100). Hardwired with battery backup, ideal for bedrooms.
Pros:
Cons:
See details: First Alert Smoke Alarm.
Pro Tip: Combine with First Alert Radon Test Kit for full air quality checks.
Enhance protection with these guides:
Yes, its 85dB siren carries 40+ feet, but add interconnectable units like Kidde for multi-room alerts.
Every 10 years for sealed units; 7 years for Ecoey. Check manufacture date on back.
No for low battery, but test/silence works for alarms. Upgrade to First Alert for full hush.
Avoid direct steam; best for hallways. Kidde's sealed design handles more environments.
Battery minis like Ecoey for renters, but Kidde Hardwired if wiring allowed.
Ready to buy? Grab the Kidde top pick now. Stay safe!
