http://www.idtechex.com/research/articles/electric_vehicles_the_clever_ten_year_strategies_00002357.asp

Much the same picture pertains with traction batteries, the largest single driver of cost and performance of most of these vehicles. Here there is even more horizontal selling but the savvy players choose their targets carefully. For example, Electrovaya of Canada recently showed its first profit of $549,000. A manufacturer of battery operated healthcare products, its entry into traction batteries has been in specialist vehicles such as the Hummer military vehicle, the Dodge Ram pickup truck and the Canadian Maya low speed car, Tata and Hero. Its batteries are the safer lithium polymer type.