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This battery works for my Z6! This battery will charge in the camera! ! ! I haven't completely drained my battery yet! Hope it gives me something other than just 100of the first shot3Square batteries work better! EN-EL15The performance of the built-in battery (Nikon) is also poor, 102shooting, only open 2Hour! 

Hi. Yes it is suitable , in fact , that's the very camera I'm using it on. It rather depends what you mean by 'fully'. The camera will not use any of it's auto features because the lens is totally manual , there is no metering and also the focus aids don't work. However , the camera takes pictures with a tamron lens perfectly well . Set it to 'M' on the dial and then set your own shutter speed and aperture . It will look a little dark through the view-finder ( at least it does on my 135 telephoto lens ) but the pictures come out fine . 

Rotate the white ring can set apertures 

Yes, it is indeed Nikon f mount.