jam54 is right. And once again I tried to justify Lithium Ion, but after reading this
, I decided it's unknown if the investment really pays off with the so called 5x the life claim. I think especially with these cheaper Lifep04 cells in the market, the odds are not good of making 10 years and to buy a top of the line cell from A123 doesn't add up. I think I'm better money and headaches ahead to wait for a real alternative to Lead in the next 4 years. I think some patents expire and hopefully a major revolution occurs for hybrid and electric cars in the next 5 years that brings forward a good lightweight and better battery over SLA.
A123's bankruptcy and Boeing's 787 problems aren't good signs for the viability of the technology.