Thanks for your answer Bob! It has alot of information i'm having trouble deciphering, but I think I get the gist. So You are saying 4 'D' or 4 'C' Cells will also not harm the arduino? And also, do you think that the big 6volt ought to be ok? http://salestores.com/stores/images/images_747/MN908.jpg (For reference)
What is "4V4", "1V7" etc...? I have never seen "XVX" before and am not sure what you mean
Thanks again for the help!