I was just wondering if it will be possible to make a small enough generator to power a phone or a couple of batteries with like a 30cc engine or something similarly small sized and a dc generator driven by the engine. It would be pretty cool to have that in camps or in a post apocalyptic situation. It would be pretty cheap to run too since it will be such a small engine.It will be a first with Ben to make something out of an engine!Sorry for my poor English, it is my second language.
-Thank you for your time, Have a great day.
You could probably do this with a small stirling engine as below, but it is tough to compete with the cost of simple solar cells for this application.
Here are some examples of stirling engine generators:
A small windmill might also be useful.