Back-up power for RTC

I currently designing a carrier board for the TX2.
I would like to know the power needed to provide back-up power for RTC.

On the jetson dev kit there is a Seiko XH414HG-IV01E supercap connected to the A50 pin, how long does the RTC get powered with the supercap when system power is disconected ?


The RTC current is 2uA typically. The full charged voltage is 2.45V, you can calculate the time with these.

Thank you for your answer.
I found less than a day, I will use a lithium coin cell then.