I think it is questionable as to whether or not these foldable props will rotate at all during a free fall, if they do then I suspect they will be driven backwards. I have seen a DAT from a free falling P3 and from memory the rpm's were negative...
In addition to any legal concerns, remember to set the failsafe option to either hover or land and make sure you can get to the drone before a low battery RTH kicks in.
That assumes the drone behaves in the normal DJI way.
Be aware that a "land"...
I know of no number and even if there is I suspect your chances of replacing the connector successfully are infinitesimal and perhaps risks damaging other components on other boards through shorted connection etc.
I would suggest replacing the...
It might also be available from the icon along the top of the screen.
I assume you are talking about a fly app using drone and I don't have a fly app drone with OA but with a go4 drone the above icon acts as a short cut.