What role do batteries play in the functionality of smoke detectors?

Batteries serve as the primary power source for smoke detectors, enabling them to function effectively. Smoke detectors rely on a constant supply of power to monitor for smoke particles in the air and to activate the alarm system when smoke is detected. Without batteries, especially in battery-operated models, the smoke detector would be inoperable. This makes the function of batteries essential for the continuous operation and reliability of smoke detection systems, ensuring that they can alert occupants in the event of a fire.

While some smoke detectors may be hardwired into a building's electrical system, these units often still have a battery backup to maintain functionality in the event of a power failure. Thus, the role of batteries is fundamental to the overall safety system that smoke detectors provide.