What Happened to A123?

Without a price on carbon, making batteries that can compete with oil is a huge, probably impossible challenge:

Three years later, A123’s situation looks very different. Its stock value has fallen dramatically, depressed by ever-increasing financial losses. This week it reached a low of 82 cents a share, down from $25.77 shortly after its IPO. The company loses money on every battery it sells, and it’s desperate for more capital to stay afloat. Its most recent earnings statement included a warning that the company might not survive.