In the third quarter of 2012, however, the weak demand from the 3C industry drove the prices of 18650 cylindrical li-ion cells to US$0.12-US$0.2/Wh (watt hour) So this translates to $120-$200 range per kWh. If company is willing to place sizable orders, price most likely would be at the lower end of the range, probably even reaching below $120 per kWh for high volume. http://news.cens.com/cens/html/en/news/news_inner_42230.html Sure, those 18650 cells are optimized for notebook/tablet markets. And while altering chemistry for longer lifespan would cost extra $$$, it would be more like few %, possibly few dozens %. But such cells definitely would not cost 2x. My point is that there is so many journalists and "analysts" around who claim ridiculous costs of kWh in the press... Just pointing out market realities.