Electric car batteries become less effective over time and need to be replaced. Currently, most major auto manufacturers guarantee good battery performance for only about eight years. So, one American company has found an unusual way to reuse the batteries that electric vehicles are no longer using. The company, called Eaton, is a large supplier of truck parts and industrial products to businesses all over the world. Eaton is also an energy storage company. It takes aging batteries, which it calls “second-life batteries,” from Nissan’s electric Leaf vehicles. The company then reuses them with its xStorage product, which stores power in buildings. An official with Eaton recently told Reuters news agency the company is now in talks with several European football teams. They are discussing using electric batteries to help power their stadiums. Eaton has already equipped a major stadium in the Netherlands with such a system.