So I tried to pin Tesla down about this, and they were a little vague. I love my car, and I love taking it on little day trips over the weekend. But without the mobile charger, I am very limited in what I can get to and then back to Aptos for charging at night. 2 weekends ago, I needed to go to Livermore, last weekend I went to Big Sur, and tonight I have tickets for a show in San Francisco. In all cases, it is just at the edge of where I feel comfortable of having enough range in Standard Mode, so I charge it in Range Mode. They do warn that frequently charging in Range Mode will decrease the life of the batteries, but I don't have a good idea of what that means. Is it okay to do once a year? Is it okay to do once a month? Is it okay to do once a week? What constitutes too much Range Mode? Does anyone have any better guidance?