Hi guys, I have an M42 adapter that has an AF confirm chip on it, and I routinely mount it on my Canon EOS DSLR and also Canon EOS Rebel film camera. The problem is, when I mount it on my A2E, it resulted in a completely drained battery over 2 hours (the battery was new). I wonder if there are any known issues with these adapters. Someone mentions this in passing when answering some other question about battery life (a post from 7 years ago!), but I have been unable to get any more information. I am just wondering if I may have left the camera in a position where some button was depressed the last time and not notice it. That will in fact be the best case scenario since I really enjoy my M42 lenses. Thanks!