RTC setup wih cell coin in Jetson Nano Developer Kit 945-13450-0000-100

Hello, thanks for your reply. I followed that topics and the tutorial posted by Ingmar-Stapel in this post:

But I am wondering if that applies to Jetson Nano Developer Kit 945-13450-0000-100, because I followed the steps (soldering the holder, placing the coin cell and configuring systemd-timesyncd.service) in the two 945-13450-0000-100 boards I have and RTC clock resets in both cases when powered off.