For how long will the auxiliary battery provide power to the backup flight instrument and UHF tuning?

The auxiliary battery in the T-6A Texan II is designed to provide backup power to essential systems, specifically the backup flight instruments and UHF tuning, in the event of a primary electrical failure. It is engineered to maintain these critical systems operational for a duration of 30 minutes. This design ensures that pilots have a sufficient amount of time to manage the situation effectively, allowing for continued navigation and control of the aircraft during an emergency. Understanding this capability is crucial for pilots, as it informs them of the operational limits and the importance of responding to electrical failures in a timely manner.