I have a short commute to work (6.5 mi). I may have another short errand to do on the way home, taking me up to 20 mi round trip. I believe Tesla recommends that you plug in every night. I wonder about things like the number of cycles of the battery. I have been charging to 80%, but only on the weekends. During the week I don't plug in unless any type of trip or demand on energy would be coming up the next day. Is this ok? Might this extend the battery life or should I plug in every night for the longest battery life?