Ohhhh, thanks. So do you know what regulator i'll need? I know even less about regulators than I do about resistors.
I put a 3.8v rechargable battery from an SP into a CGB, and I'm having problems, so I want to make it go back to 3v.
I would just look for one that says it drops it to 3v. There are some wide range ones that will take anything between 3v and 24v and drop it to 3v.