Okaaay...i was just quoting the help file. It's not active in my setup. Pilots complaining its kicking in too early.
"Smart Return to Home: Enables/disables the Smart Return-To-Home (RTH) feature. When it is enabled, aircraft will request to go home when remaining battery is only enough for completing the go-home action."
Hmmmm, I think I will ask for clarification on my end.
Don't want to steer anyone wrong.