The system design was cooked up by the California Cars Initiative and uses newly designed batteries from Nilar that reduce size, weight, and internal resistance. Nilar's developments result in a battery that's equal in power to the standard Prius battery, but about half the length. The conversion does run into the low tens of thousands, but you can make the math work if you keep the car for ten years, bringing the cost for the additional hardware down to $1,000 per year.
Video trailer posted after the jump
[Source: Automotive Design Line]