You want to change the world, with one simple device? Build a better battery. Yep, the humble battery. If scientists can improve its power and range, the battery has the potential to dramatically change how we fuel planes, trains and, in particular, automobiles. A better battery is also one big hurdle that lies between here and much wider use of renewable energy. That makes a better battery a big weapon in the fight against climate change. As Schwartz Fellow Steve LeVine says, batteries are the one technology that really worries oil and gas companies. In this podcast, LeVine and Scientific American's David Biello as this podcast tells you where to look for the 21st century Holy Grail, who's on the journey, and the state of the search.