I have heard a lot about its fuel cost effectiveness of Tesla electric cars. I read in the data sheet that the battery cycle life is about 500 cycles (nominal cycle life for most of 18650), Each cycle drives the car about 400 Km (nominal range). Then it expected for the car to travel 250000 Km without needing the battery replacement. Off course for a daily uses of 80 Km (Fairly long distance) Each month will be 2500 Km and the battery will do the job for complete 8 years. It looks wonderful. But let us have a closer look. 70 Kw battery pack price is about +24000 us$. It means that the battery wear rate is about 10$ per 100 Km. It added to the electricity coast. Its look awful. Tesla motors tries to develop the luxury expensive cars to hide the battery pack costs. I think this approach can not be spreads toward the normal cars. Because it is not economical effective. I think it can be used just by ones who don't cares about the economy.