I just had this one, was the battery. I did a log and graphed my battery over a few days and on day 4 my battery was dead to the point it would not turn over over. I think this varies from car to car, battery to battery quite a bit. I believe a few members use a charger in between drives to prevent the battery from dieing. There is no way my battery would last 2 weeks.
Take the battery to Autozone or equivalent and they can load test it.
Try push-starting the car. I did it one day. When I started it at home, the battery barely had enough juice to start the car and I only drove it about two miles to the store. When I went to leave - "click". So I pushed it about 4 feet, jumped in, and engaged it in 3rd? gear. Fired right up. and drove home.
You could also jump the car and bypass the battery by connecting the BLACK cable directly to the block. I had a piece of equipment that had a battery/start issue and it turned out that there was unseen corrosion between the terminal and the cable. Nowhere else. Just between the two surfaces.