D700’s top screen is off completely when this grip is on
if there is no battery on the grip, the grip works with the D700 and you can shoot with the shutter button on it
I have tried with the en-el3 from the camera in the adaptor, an en-el4a, all the same
it works perfectly on a D300
in fact, it’s labelled as “D300”, it puzzled me too on why it didn’t work on D700 but it works on D300
if you know something I don’t feel free to test it