What behavior of lights on the SCBA pack indicates a low battery?

The behavior indicated by a flashing yellow light once every 2 seconds on the SCBA pack serves as a warning that the battery is low. This specific pattern is designed to alert the user to address the power supply in a timely manner to ensure the SCBA operates safely and effectively during use.

A flashing yellow light is intuitive for users as it signifies a cautionary status; in this case, it denotes that the battery's charge is diminishing but not yet critically low. Recognizing this alert allows the user to recharge or replace the battery before it impacts the device's functionality during an emergency situation.

Other light indications, such as flashing green, typically signify normal functionality or a fully charged battery, while flashing red usually indicates a more urgent condition that may suggest that the SCBA is not operational or requires immediate attention. Understanding these signals is critical for effective use and safety when relying on SCBA in hazardous environments.