I have an adapter that goes to a CDR drive that has and output of 5v and 12v. I clipped the ends and put on a male plug for my UA5 and iriver, and it works fine. Because of this I was thinking, I have a project box and thought I could make something that will charge my iriver and two batteries. It would need to output 5v, 15v, and 15v.
It's been a long time since I've done something like that. If someone could point me to a schematic I could go from there.