Here's an article from Popular Mechanics about Honda's 3rd version of the FCX fuel cell car. Here is a piece from the article:
In addition to the ultracapacitor, Honda introduces an abundance of other advances in the FCX V3 over earlier fuel-cell concepts. They include:
• Lighter weight and a 50 percent larger hydrogen fuel tank.
• A lighter, more compact and more powerful drive motor.
• Four-passenger seating.
• A 10-second startup time versus 10 minutes.
• A 5-minute refueling time versus 20 minutes.