The standby battery is rated for how many volts and amps?

• A. 24 V 10.4 A
• B. 28 V 12 A
• C. 24 V 8 A
• D. 12 V 5 A

Answer: (A)

Standby power keeps the essential systems alive when the main power sources fail, so it’s defined by two things: the voltage of the supply and the current it can deliver to the critical loads. In this aircraft, the standby battery is a 24-volt source that can deliver 10.4 amperes. That 24 V matches the essential bus voltage the standby system powers, and the 10.4 A rating is what determines how much current the battery can supply to keep those critical loads operating for the required duration. Other voltage options would imply a different power architecture, and a smaller current rating wouldn’t meet the needed load, so the 24 V and 10.4 A pairing is the correct specification.