Lithium-ion batteries are the heart of new technology. They're used to power everything from cell phones to electric cars and many consumer electronics. And it's a Canadian firm, Electrovaya, that's leading the way, producing clean, safe lithium-ion batteries. In order to grow their business, they're expanding overseas to develop their products. Now they're poised to become global leaders in the industry. The CBC's Reg Sherren investigates.

From the Curio channel: News in Review.