Electric cars and buses may quickly be gaining ground on their internal combustion counterparts, but they still face numerous technical hurtles before becoming the de facto transportation technology, the first of which is that current battery chemistries either allow for high voltage output over a short time or low voltage over a long time. If only there was a way to combine the best of both batteries. Oh wait, GE just did.
Most fuel-cell powered buses are powered by Lithium-ion batteries. These are great for quick acceleration but tend to dump more energy than the system actually needs, which drains them quickly and results in an average range of just 50 miles before needing a recharge. That's about half of what a majority of the transit and school bus lines in America travel daily, so you either need to double your fleet or double the size of the fuel cells to make up the difference, neither of which is a particularly cost effective approach to the problem.