Right now the app doesn't ever issue the "Wake" command to the car. It could be that, when the car is unresponsive, it spins and burns energy trying to get to the car. That's something we need to look into so I'll file an issue on our side. Meanwhile, it's probably best to set the "always connected" state on your car to limit the phone battery burn. Phone battery use in general is something we need to spend time on.