10-Year Battery Backup

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First Alert 10-Year Battery Hardwired (with Battery Backup) Smoke and Carbon Monoxide Detector
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FIRST ALERT SMICO105-AC Hardwire Smoke & Carbon Monoxide Alarm with 10-Year Battery Backup, 3-Pack
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KIDDE 30CUA10-V Hardwired Smoke & Carbon Monoxide Detector, 10-Year Battery Backup, Voice Alerts, Interconnectable LED Warning Light Indicators
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