jason hopper , Jun 30, 2005; 05:17 p.m.
From your description, the winder that came with the camera may be a Winder G-P. Is there a thick peg with contact on top coming up from top of winder? If this is a Winder G-P, the XG was powered by the AA's in winder. If you want to power XG separately it'll use (2) 1.5v 76's stacked. You should be able to find a replacement battery cap at places like Huron Camera ("huroncamera.com" in their replacement parts department).