From an infrastructure standpoint, purely electric vehicles make more sense. There are 15,959 electric charging stations in the United States, but only 35 hydrogen stations in the entire US, according to the US Department of Energy. Of those 35 hydrogen stations, only 3 can be found outside of California. But car makers still see potential in hydrogen technology. Batteries are expensive, take a long time to charge, and have limitations when it comes to driving range.