I never said they where interchangeable. I don't know where you got that idea. But it seems fairly normal for people to think others have made such careless mistakes for no reason... Well, the more voltage you have, the more power you can generate from it... Maybe you could have looked at the circuit to see that for yourself. Why do I have to tell you now when you could have just looked at what I linked before? Hrm, okay, circuits run without power sources now? I think I will go discuss it in more detail with the wall.