Just a suggestion but try running an eraser over the contact of the battery. It may be they are just slightly dirty and not making good contact. I'm not sure you can get at the contacts on/in the camera itself but if you can do it to them as well.
Good call airgunr, and a good learning experience for Mark.
I'm very happy you got it working again. I also learned a couple of tricks now for cleaning solutions. looks like a win for all of us!
Thank you, thats the trick i learned from a friend (who is a mechanics) to clean the contact of my car batterry when he saw mine full of acid residue(dont know what the right term but it green like powder around the contact) he said it will cause a problem someday if i dont remove it...the baking soda desolve them really quick...