Found some heavy wheel, has a shimano sprocket thing on it. It's obviously an electric wheel or whatever with a motor inside or some crap. is there a way to test if it works or not? It has some wire sticking out with a bunch of little pins on it which you plug into something

That is strange.

Is it chargeable? I didn't saw such type of wheel in my life. If it requires a battery to run then you can easily try it.

Pic?

Could be a generator for a light.