I know that there is such a machine called the Z Machine, but doesnt that generate electricity and not store it? I also heard about the Virus battery, a battery that feeds off of viruses, cool concept actually. Anyways, I want to know what is the most powerful commercially available battery, that has all the best features(like less charging time, etc.) And if you can, tell me if you know what will the future be in battery technology. TCOol thanks