BRK First Alert SMI105-AC
Best reliable safety upgrade for homeowners with existing hardwired systems.
This is the set-it-and-forget-it solution for home safety. By combining hardwired reliability with a decade-long sealed battery, it eliminates the annual chore of battery swaps. You sacrifice the ability to change the power source, but you gain the peace of mind that comes with truly continuous, maintenance-free protection.
$26.98
at
Electric Bargain Stores
Who it's for
- Homeowners seeking a minimalist aesthetic without bulky safety hardware
- Residents tired of false alarms triggered by daily kitchen activities
- Property owners wanting a permanent safety solution with consistent power
Who should skip it
- Renters or DIY novices looking for a simple battery-only installation
- Safety-conscious buyers requiring dual-sensor technology for comprehensive fire detection
- Tech enthusiasts wanting remote notifications and smartphone integration
Performance breakdown
Maintenance Freedom
The sealed 10-year battery eliminates annoying annual chirp-induced sleep interruptions.
System Integration
Hardwired interconnectivity ensures every alarm sounds simultaneously for maximum home safety.
Detection Speed
Ionization sensing excels at catching fast-flaming fires before they spread.
User Interface
The single-button design makes testing and silencing alarms incredibly intuitive.
Troubleshooting Ease
Latching indicators quickly pinpoint exactly which unit triggered the alert.
Build Reliability
UL 217 8th Edition certification guarantees rigorous, industry-leading safety standards.
Key Specs
Detection Technology
Ionization
Power Source
Hardwired with 10-Year Lithium Battery Backup
Connectivity Type
Hardwired Interconnected
Interconnectivity Type
Hardwired Interconnect
Battery Type
Lithium (Sealed)
Battery Life
10 years
Alarm Type
Siren
Alarm Sound Level
85dB at 10 feet
Dimensions
2.25 in x 5.69 in x 5.69 in
Weight
0.61 lb
Know before you buy
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