I run my 14 with s76 silver batteries in a Cris MR-9 adaptor and it works very well. I've used it in a lot of cameras that originally took the PX13 or PX625 batteries with never a problem.
I also second all the comments about Mark Hama. I got his name off of the Yashica website many years ago and he has never failed me. At one time I had at least one example of every leaf shutter camera that Yashica made and Mark was the best.
Happiness is a CLE with a collapsible Summicron, loaded with Scala.