I was wondering about Piezo transformers. They make small ones for various things. Now with man made pieces, can't we make one big enough to get a decent charge of voltage? maybe we can get a transformer designed big enough to run a dc motor? I know there is no free energy and you need some energy to make things go, but this would produce a high voltage from a squeeze. not sure if it could lessen the battery power needed to create the same volts we want to run. but since we can use man made parts, we can make them bigger or use more of them together?
started checking out this kind of design for the voltage, but isnt enough to run with, although the charger on this page is cool.
maybe even just get a charger like this for replenishing the batteries? hehe