Rick Campbell , Apr 16, 2002; 05:55 p.m.
I think Wein Cell makes a replacement for the PX-13B. I believe it's a silver oxide battery with a voltage regulator to simulate the mercury ones. But I must say that the meter on my 124G was pretty useless if you're shooting slides. You'd be much better of with a small meter like the Sekonic 308B in my experience.