This would be a great help for me, and undoubtably others:
Make a configurable option in the device manager so I can configure the 20S to turn off after X minutes (preferably the time would be configurable as well) when no bluetooth connection is live.
That way when you walk away from the bike the phone gets disconnected and the 20S turns off. Or the GPS on the bike turns off and the 20S turns off as well. For people who don't want this, they can configure it otherwise in the device manager.