That’s easy, just carry a can of electricity in your electric car!
Actually not far off from one idea seen last week. A catalyst was found to allow water to react with aluminum, completely oxidizing the metal in only minutes. The hydrogen left over from the water (H2O)is available to produce electricity within a fuel cell.
This may not make financial sense as a way to power a car on a daily basis, but might make for a great emergency electrical backup system.