In a nation with a reputation as a tough place to do business, American tech entrepreneurs are importing the Silicon Valley mind-set. Promethean Power Systems has developed a thermal battery that is able to take advantage of the intermittent power on the grid. The battery releases a cold fluid that chills milk quickly. The company has Hatsun, India’s private largest dairy as a client and has attracted funding from clean technology investors, the National Science Foundation and the US-India Science and Technology Endowment Fund. <<more here>>