While not directly comparable, the Rolleiflex 2000F / 3001 / 3003 cameras are *very* sensitive to the power being used.
Only Ni-Cds should be used in them: while alkalines and Ni-Mhs normally work, in some particular situations (end of charge corresponding to end of roll), they could jam or even severely damage the camera.
The F3 is certainly a different animal, but I'd make sure it was really safe and not just just listen to "I used Ni-Mh akkus and they worked fine!" type answers.