Look what may be around the corner for us...

[MustangChris]

5 years until they predict this technology will hit passenger cars...

(Keep in mind while reading "Flywheel" is a generalized term for, well, a flywheel. They aren't talking about the one behind your crankshaft...)

http://www.bbc.com/future/story/20120629-reinventing-the-wheel/1

 

[JonBeast]

Interesting

 

[ProKiller]

they make these a replacements for traditional battery uninterruptible power supplies (UPS) that hold data centers. they are also commonly used to hold the machines at casinos in case of power loss.

 

[OnyxCobra]

cliff notes?

 

[ivan12]

Pretty much heavy discs that can retain energy and put it back in a battery as the tires on a car spin. Gets going fast and keeps a certain momentum. New technology that Audi used in the car that won the 24hr of LeMans.