Was out on a shoot yesterday. I notice the battery in my after-market MB-12 was getting low, but thought the D800 should switch to the internal battery which was fine. When I got home and uploaded the days work, I found the 3-4 shots that I viewed on the viewfinder were not on the card AND the shot prior to the missing shots, was only a 1/2 image. The bottom half was black.
It appears that my D800 is doing it again, but can it be attributable to the low battery in the MB-12? Very curious. As always, please have a Great Day!