I've tried putting the batteries in both ways - turns out the lid won't even go on when inserted incorrectly. I've tried a total of 6 batteries now - they are all confirmed to be working (may not be fully juiced as they are a year old to me, but they all fire my Yashica T4 without any problems). Contact faces are flawless, just like the rest of the camera (cosmetically, that is).

Really bummed as I was looking forward to taking this on a trip I'm leaving for on Monday.