When you get tired of paying for Wien cells ( http://www.micro-tools.com/store/Sea...rd=wein%20cell ) and replacing them every couple of months, go to the local drugstore and buy a 6-pack of #675 hearing aid cells for about the price of one Wien cell. Then get an 'O'ring(s) at the hardware to act as a bushing to center the cell(s) in your battery compartment.

Here's how to make the drugstore cells last a lot longer than Wien cells: After you peel off the tab, take some tape or glue and block/plug 3 of the four airholes in the cell case. Cells modified in this manner last over 1 year in my Nikkormat, but it will depend on your camera and how you use it.