How about an aa battery that recharges ITSELF using Super capacitor  technology !
http://www.youtube.com/watch?v=x92qqJ5yQnM

                        Honda's New ULTRACAPACITOR  CAR

http://world.honda.com/FuelCell/FCX/ultracapacitor/

Hi,

No problem. Buying the UC was well worth it regardless, and could come in handy for other projects, especially the data logger. 

At 30 minutes the total energy was 1.629 joules, UC voltage was 78.4mV.

At 60 minutes the total energy was 6.268 joules, UC voltage was 152.3mV.

Paul

Gadget:

The great thing about using ultracapacitors in a vehicle is the regenerative braking.  Instead of turning all of the energy in the moving vehicle into heat in the brake pads it is transferred into the ultracapacitors.  The same thing for rolling down a hill, you can use the gravitational potential energy and put it into the ultracapacitors instead of turning it into heat.

When you brake the car using a generator to charge an ultracapacitor bank you are taking the energy in a mechanical capacitor (the moving car) and transferring it into an electrical capacitor.

The AA battery that recharges itself is not real, just some person's musings in the game Half Life.

MileHigh

BTW, if it's not COP>1, then no need for alarm. If it is COP>1, then please quickly spread the word just to be certain this information is not squashed!

Regards,
Paul

Quote from: MileHigh on December 06, 2009, 04:16:50 PM
you are taking the energy in a mechanical capacitor (the moving car) and transferring it into an electrical capacitor.

Thanks captain obvious for your obvious rescue.

@Paul: I wouldn't worry about that. I would worry more about being able to get these ucaps.