BCON Technology Flywheel

My new favorite kinetic battery technology, the Beacon Power, Smart Energy 25 Carbon Magnetic Vacuum Flywheel! (I had this same idea about 2003, but I called it the Hummer). Spins at Mach 2, underground, using a vacuum tank and supported by a combination of permanent and electromagnets, this kinetic battery matrix can stabilize up to 2-MegaWatts of grid power. Beauty.

http://www.beaconpower.com/