How long can the #1 and #2 batteries provide power?

How long can the #1 and #2 batteries provide power?

• A. 5 minutes
• B. 15 minutes uninterrupted emergency power
• C. 30 minutes
• D. 60 minutes

Answer: (B)

In an electrical outage, the two main batteries are used to keep the essential flight and avionics systems powered for a finite period, so you have time to respond and land safely. For the UH-60S, those batteries provide uninterrupted emergency power for 15 minutes. That duration is long enough to sustain critical instruments, radios, and flight controls while you diagnose the issue or restore power from another source (like the generator or APU). The other time frames aren’t correct because the batteries aren’t sized for longer continuous emergency operation without risk of overdischarge, and they’re not intended to sustain all systems for those extended periods.

In an electrical outage, the two main batteries are used to keep the essential flight and avionics systems powered for a finite period, so you have time to respond and land safely. For the UH-60S, those batteries provide uninterrupted emergency power for 15 minutes. That duration is long enough to sustain critical instruments, radios, and flight controls while you diagnose the issue or restore power from another source (like the generator or APU). The other time frames aren’t correct because the batteries aren’t sized for longer continuous emergency operation without risk of overdischarge, and they’re not intended to sustain all systems for those extended periods.