I have a 100D. I parked the car in my garage Saturday night with 50 miles of range left. I forgot to plug it in, so I figured I would wait till Sunday night to charge it. I noticed Sunday night that I was down to 18 miles. Losing 32 miles in my garage seemed very odd, considering that it's about 65 degrees in the garage. This morning I left the house with 298 miles (charged to 90%). It was 295 when I got to work. I went out during lunch and noticed it was up to 315 miles. Any ideas what's going on? Thanks