What should an installer verify regarding smoke alarms during installation?

During the installation of smoke alarms, it is crucial for an installer to verify that the devices are properly backed up by batteries. This ensures that the smoke alarms will function correctly even during a power outage, maintaining their reliability and effectiveness in detecting smoke and alerting residents to potential fires. Proper battery backup is an essential aspect of smoke alarm installation, as it directly impacts the safety and responsiveness of the alarm in emergencies.

In addition to battery backup, other factors such as the model of the smoke alarm, its placement in relation to windows, and its connection to electrical systems might be relevant. However, the primary concern is ensuring that the smoke alarm will operate regardless of external power sources, making battery backup a critical verification step during the installation process.