Smoke & CO Detectors · Head to head

First Alert SC5 Battery Smart Smoke & CO Alarm vs First Alert SC5 Hardwire Smart Smoke & CO Alarm

Full Smart Smoke & CO Detectors comparison in 2026

Data from Amazon and official First Alert site.
2026 verdict
Across the 2026 comparison, First Alert SC5 Hardwire Smart Smoke & CO Alarm earns the nod over First Alert SC5 Battery Smart Smoke & CO Alarm on the strength of price. It wins the broader comparison through price, while its broader overall balance helps confirm the result. Pick First Alert SC5 Battery Smart Smoke & CO Alarm only when rating is the deciding factor for your setup. In practical terms, First Alert SC5 Hardwire Smart Smoke & CO Alarm is the easier product to recommend.
FeatureFirst Alert SC5 Battery Smart Smoke & CO AlarmFirst Alert SC5 Hardwire Smart Smoke & CO AlarmWinner
Price$129.98$129.00First Alert SC5 Hardwire Smart Smoke & CO Alarm
Rating3.52.8First Alert SC5 Battery Smart Smoke & CO Alarm
Warranty10 years10 yearsTie
Connectivity2.4 GHz WiFi2.4 GHz WiFiTie
IntegrationsGoogle HomeGoogle HomeTie
ScreenNONOTie
SensorsSmoke, COSmoke, COTie
AlertsFire Alerts, CO Alerts, Low Battery AlertsFire Alerts, CO Alerts, Low Battery AlertsTie
Built-in SirenYESYESTie
Built-in LightNONOTie
Tests ItselfNONOTie
PathlightNONOTie

Frequently Asked Questions (FAQ)

Which is better overall: First Alert SC5 Battery Smart Smoke & CO Alarm or First Alert SC5 Hardwire Smart Smoke & CO Alarm?
First Alert SC5 Hardwire Smart Smoke & CO Alarm has the stronger overall profile in this comparison, especially for price.
What is the biggest difference between First Alert SC5 Battery Smart Smoke & CO Alarm and First Alert SC5 Hardwire Smart Smoke & CO Alarm?
Price is one of the clearest differences: First Alert SC5 Battery Smart Smoke & CO Alarm lists $129.98, while First Alert SC5 Hardwire Smart Smoke & CO Alarm lists $129.00.
Which one looks better on price?
Who should buy First Alert SC5 Battery Smart Smoke & CO Alarm?
Choose First Alert SC5 Battery Smart Smoke & CO Alarm if your priority is rating and that matters more than price.
Who should buy First Alert SC5 Hardwire Smart Smoke & CO Alarm?
Choose First Alert SC5 Hardwire Smart Smoke & CO Alarm if your priority is price and that matters more than rating.
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