After the car sits without starting for 2-3 days, or you use any accessories for 15 to 20 minutes, the battery drains to the point where it won't start without putting a charger on it. I have taken it back to the dealer two times and they can't find anything wrong with the battery or the electrical system. The last time I took it in on Nov 19, 2020, they told me that it was the computer system running all the time was causing the battery to drain. They told me I would have to start and run the car every two days and let it run for for 30 min. or keep a charger on it. If I'm not driving it every day.

This seems really stupid to have to do this on a new car, so I asked the dealer what If I took a flight and had to leave the car sitting at the airport for a week? They told me I would have to remove a battery cable. That is one of the dumbest things I have ever been told - how many people are going to either know how or want to remove a battery cable if they leave their car sitting at an airport or anywhere else for an extended time? No one that I have asked about this problem has ever head of a new car doing this.

Update from Dec 11, 2020: Took the car to a different dealer service dept. They found that the battery was bad and replaced it.