Hi, I'm pretty superstitious about batteries and stuff. I have the 2017 and I use the Android Auto whenever I drive (Let's hope for Waze pretty soon yup?). But to the point. At least for now, being scared of draining my car battery. I unplug my cord every time. It might be a little soon to gauge if keeping it plugged in affects the battery, but I'd like to see what you guys do.