World Energy Labs, a San Francisco company that develops electrochemical diagnostic software to measure the lifespan of batteries, fuel cells and other products, has raised $5.4 million in a second round of funding, according to VentureWire (sub required).

Led by Expansion Capital Partners through its Clean Technology Fund II LLP, the investment will support the expansion of the company’s sales and marketing efforts and build out its manufacturing facilities, according to Chief Executive Officer Sean Salloux….The company raised approximately $5 million in its previous financing through a series of investments from private, individual investors, [CEO Sean] Salloux said.