F1Hybrid

Despite some serious reservations regarding the safety and high cost of the Kinetic Energy Recovery System

WHY USE BATTERIES IF FLYWHEELS WILL DO?

Formula One could be on to something big. Next year all teams will be allowed to capture the energy that their cars produce under braking, and then re-use that energy at opportune moments, like passing on a straight.

It's really a hybrid system, but they don't call it that. They call it a Kinetic Energy Recovery System (KERS).

Formula One is going hybrid starting next year, according to statements released by the sport's governing body the FIA. The Kinetic Energy Recovery System (KERS) will be phased in over a period of several years, starting with the 2009 season and culminating with the full-fledged implementation by 2013. The system works essentially by storing energy expelled under braking, which can then be used via a "push-to-pass"-style button mounted on the steering wheel that drivers can employ for an extra power boost.