I found this article to which i find very interesting and promising about replacing batteries with the ultra capacitor storage...
still in the infant stage it looks very promising - any comments???
Ultracapacitors to replace batteries
Ultracapacitors to replace batteries, Batteries start fires. Batteries pollute. Batteries wear out. Batteries can leak acid. What the world needs is a better way to store electric energy. The people who invested in Google, Amazon, and AOL are now putting their money in ultracapacitors.
New ultracapacitors can replace batteries
If a new company called EEStor delivers on its promises, storing electric power in what it calls ultracapacitors will change the world.
Among EEStor's claims is that its "electrical energy storage unit" (EESU) could pack nearly 10 times the energy punch of a lead-acid battery of similar weight and, under mass production, would cost half as much.
It also says its technology more than doubles the energy density of lithium-ion batteries in most portable computer and mobile gadgets today, but could be produced at one-eighth the cost. Tree Hugger
EEStore has contracted to deliver its first EESUs to ZENN Motor Company in 2007 to use in their electric vehicles. It also has patented "Electrical-energy-storage unit (EESU) utilizing ceramic and integrated-circuit technologies for replacement of electrochemical batteries."
What is an ultracapacitor and how does it work?
According to Clean Break via The Energy Blog
It is a parallel plate capacitor with barium titanate as the dielectric.
It claims that it can make a battery at half the cost per kilowatt-hour and one-tenth the weight of lead-acid batteries.
As of last year selling price would start at $3,200 and fall to $2,100 in high-volume production
The product weighs 400 pounds and delivers 52 kilowatt-hours.
The batteries fully charge in minutes as opposed to hours.
The EEStor technology has been tested up to a million cycles with no material degradation compared to lead acid batteries that optimistically have 500 to 700 recharge cycles,
Because it's a solid state battery rather than a chemical battery, such being the case for lithium ion technology, there would be no overheating and thus safety concerns with using it in a vehicle.
A capacitor is like a grilled cheese sandwich. The electrical energy is stored in the bread slices. The cheese needs to prevent the stored electricity from leaking across to the other side. In ultracapacitors the pressure will be over a thousand volts. The company that can solve ultracapacitor size, weight, leakage, cost, and safety issues will have the "holy grail" of electric storage.
Earth and Space Science
History and Nature of Science
"My Comment" - im still going with the headway cells to complete my batter pack, but this looks good as far as future energy storage goes, but im sure its one of those i'll believe it when i see it thangs, but im hopeful...