Assertion: smoke detector | /r/HasAspect | a battery backup
Facets:
value: in case
type: TEMPORAL
Source sentences:
text: All smoke detectors must be hooked directly to the electrical wiring, be interconnected and have a battery backup.
text: Hardwired smoke detectors run off of household 120V current and have battery backups.
text: Most hard-wired smoke detectors run on line voltage (household current) and have a battery backup in case a fire knocks out the house’s electrical power.