The PASS is powered by how many AA batteries?

The PASS is powered by how many AA batteries?

• A. 6 AA
• B. 4 AAA
• C. 2 C cells
• D. 8 D cells

Answer: (A)

The device is built to run from a 9-volt power source created by six standard AA batteries in series. That arrangement provides the voltage and capacity needed to power the alarm, status indicators, and the activity/inactivity signaling functions when a firefighter is wearing the PAS S. If you used smaller cells, the supply voltage would be too low for the electronics to operate reliably, and the unit might not sound the alarm or register inactivity properly. If you used much larger cells, the voltage would be higher than what the internal circuitry is designed to handle, which could require different wiring or regulators and could shorten life or cause damage. Six AA cells strike the right balance, fitting the design and delivering enough runtime and performance for field use.

The device is built to run from a 9-volt power source created by six standard AA batteries in series. That arrangement provides the voltage and capacity needed to power the alarm, status indicators, and the activity/inactivity signaling functions when a firefighter is wearing the PAS S.

If you used smaller cells, the supply voltage would be too low for the electronics to operate reliably, and the unit might not sound the alarm or register inactivity properly. If you used much larger cells, the voltage would be higher than what the internal circuitry is designed to handle, which could require different wiring or regulators and could shorten life or cause damage. Six AA cells strike the right balance, fitting the design and delivering enough runtime and performance for field use.