I have written on this company before and thought everyone might want to read some more about this company EESTOR. They are featured on CNN.com today as one of the 11 technologies that will change the world.
http://money.cnn.com/...
"EEStor's device is not technically a battery because no chemicals are involved. In fact, it contains no hazardous materials whatsoever. Yet it acts like a battery in that it stores electricity. If it works as it's supposed to, it will charge up in five minutes and provide enough energy to drive 500 miles on about $9 worth of electricity. At today's gas prices, covering that distance can cost $60 or more; the EEStor device would power a car for the equivalent of about 45 cents a gallon."