[QUOTE=I just buy the Wein battery and when it dies, replace the inner battery part with the same hearing aid battery this guy uses. It is cheaper and you don't have to order over the internet if you have a decent camera shop in town.[/QUOTE]

Well, no local camera shop worth mentioning and I didn't have to drill/bore/hammer anything out to use it. :-) And the price for four of these wasn't much higher than ordering Wein cells.