RankingRight
ElectronicsKids Learning AppsLaptopsMattressesOnline CoursesOnline TherapyPet InsuranceTax SoftwareTravel InsuranceVPN ServicesVideo Editing SoftwareAntivirus SoftwareBusiness LoansCell Phone PlansDog FoodHearing AidsHome & kitchenHospitalsLanguage Learning AppsNoise-Cancelling HeadphonesNursing HomesParental Control AppsPhoto Editing SoftwarePillowsSoftware & AppsWeb HostingBaby MonitorsDomain RegistrarsEducationHealth & WellnessHomework Help & Study ToolsMeal Kit DeliveryPassword ManagersPayrollStock Photo & Creative Asset SitesTV Streaming ServiceseSIM Data PlansAI Writing ToolsCRMElectric ToothbrushesFamily & KidsIdentity Theft ProtectionJob Search SitesPortable MonitorsRobot VacuumsSTEM Kits for KidsAir PurifiersBackground Check SitesCloud StorageMoney & FinanceOnline Tutoring ServicesSmartwatchesStrollersTravel & eSIMWebsite BuildersAccounting SoftwareCar SeatsDating AppsHome Security CamerasPersonal Trainer CertificationsSmartphonesWi-Fi Routers & Mesh SystemsEmail Marketing SoftwareKids' BackpacksMoving CompaniesKids' TabletsProject Management SoftwareCoffee MakersLLC Formation ServicesSchool SuppliesEmployee Monitoring SoftwareHome Security SystemsBusiness Phone SystemsHome WarrantySSL CertificatesStanding DesksAir FryersSEO ToolsFire SafetyPOS SystemsBathroom Essentials How We Rank How We Make Money Search
Home / Home & kitchen / Fire Safety / First Alert SC5 (SMCO600NV)
7.4 Tested Aug 30, 2026 by Team RankingRight

First Alert SC5 (SMCO600NV) (Battery, Google Home compatible) review 2026

Electrochemical CO + photoelectric smoke, works with Google Nest / Google Home, 10-year warranty

PriceFrom $129.99 · checked Sep 21, 2026

Is the First Alert SC5 (SMCO600NV) Worth It?

Best for Google Home integration. The clearest reason to pick this one over a cheaper combo alarm is the Google Home integration — useful if you're already in that ecosystem. The CR123A battery pack is an unusual choice worth knowing about before buying spares.

First Alert SC5 (SMCO600NV) Pros & Cons

Pros
  • Works with the Google Home app for phone alerts alongside the 85 dB local alarm
  • Electrochemical CO sensor plus photoelectric smoke sensor — the combination CPSC recommends over ionization alone
  • 10-year limited warranty
Cons
  • Premium price for a battery-only unit
  • Uses 6x CR123A lithium batteries — less common and pricier than AA or a sealed cell
  • No independent third-party test score found for this exact model

First Alert SC5 (SMCO600NV) at a Glance

7.4 Editor Score
Certification & ratingUL/CDC fire-class rating for extinguishers, or UL 217/2034 certification for smoke & CO alarms.
24/30
Independent review consensusHow this model is rated by outlets that hands-on test fire-safety gear (Consumer Reports, Bob Vila, This Old House).
17/25
Ease of useMounting/install, activation or hush controls, app or voice alerts where applicable.
16/20
Battery & backupBattery type and sealed life, or rechargeable service interval; hardwire/AC backup where applicable.
11/15
ValuePrice against the coverage and warranty you get.
6/10
Reader ratingNo reader ratings yet — not part of the score
–

Rubric v1: Certification & rating 30 · Independent review consensus 25 · Ease of use 20 · Battery & backup 15 · Value 10. Score = Σ ÷ 10, locked Sep 21, 2026. How we rank.

Where to buy — prices checked Sep 21, 2026

First Alert — $129.99

Best priceSee Price

First Alert SC5 (SMCO600NV) specifications

TypeSmoke & CO alarm
Battery6x CR123A lithium (3V)
Warranty10 yr
Alarm volume85 dB

Why it scored 7.4

The clearest reason to pick this one over a cheaper combo alarm is the Google Home integration — useful if you're already in that ecosystem. The CR123A battery pack is an unusual choice worth knowing about before buying spares.

Where it loses

Value vs. sealed-battery alternatives; no independent test score found.

Still the right pick for

Google Home / Nest households.

What owners say

No reader ratings yet. This block fills in from real submissions only — we never write, buy or generate reader reviews, and none of them touch the editor score.

Changelog: Sep 21 — rank 5 → 6 · all changes

First Alert SC5 (SMCO600NV)7.4 · $129.99
See Price