You can either use autofocus, which is automatically pulled at the top of the climb to the flight altitude, or infinity. The infinity button is to set it to infinity.
Here are some posts on that topic:
Map Pilot does not report the state of the battery of the remote, it reports RC signal strength. 100% is a good thing. Your remote displays the state of it charge on its own.
You can turn off that setting in the Map Pilot Settings: