I have a D700 and a MB-D10 grip.
I have put 8 fully charged Eneloop rechargeable AAs (1.2V) in the grip, 8 new alkaline AAs (1.5V) in the grip and a fully charged EN-EL3e battery in the grip. The number of fps stays at 5 in all three cases.
I have contacted Nikon Support about this but they keep saying all of the above methods will yield 8 fps.
I've watched some YouTube videos that say using a Nikon EN-EL4 battery (with a special adapter) will boost the fps to 8. Nikon Support did not comment on this idea.
Any thoughts or suggestions on this topic?
Comments
Cheapest I can find is on ebay a DTSE version 303738353106
You can shoot jpeg, or RAW 12 or 14bit, but IIRC you have to disable in camera noise reduction, lens distortion control and vignetting reduction to get 8FPS. I sold my D700 5 years ago, so I cannot check to confirm that though.