I am not looking what to buy/get - I already have F3 and M6 - I was just curious about cameras that have AP and full manual speeds when battery dies - because couple of days ago I was with my F3 in cold weather (-15C) for couple of hours and on the end I had only M80 speed (battery was ok - but it was just too cold for long time - when I was back in warm - battery was ok). I had to use F3, not M6 because I needed 105mm lens
As Les sez, just get the Nikon anti-freeze kit. I use one for my FEs+F3s, as well as an extra MS-3 battery tray for the MD-4. AE? No problem.