After 33,300+ miles, my batteries have lost approximately 7% capacity. In the beginning after a bottom balance, I was getting 194Ah out of my slightly undercharged pack. Last month 03/01/2014, after my bottom balancing, I only got 180Ah. 14/194=.072 I went 120 miles on this trip.
At this rate I should reach my goal of getting 100,000 miles out of my pack. Stay tuned.
Last year I purchased a Rav4EV 2012 model new from Toyota. This is a California zero emission compliance car from Toyota and they don't promote it. 2014 will be the last year they produce it. It is the result of a collaboration between Tesla motors and Toyota. It's a great car for rainy days and trips to the beach and to Haul my Bike to go Bike riding. I have a tow bar on the back so I can attach a bike rack. This car has the 40Kwh pack from Tesla and will go 140 miles if I drive it conservatively. If not, it goes zero to 60 in 7 seconds. This car does great burnouts. Not bad for a soccer mom looking car. Now if only I could get the wife to drive it. My daughter loves it though.