Name: Phottix BG-D800M Magnesium Battery Grip for Nikon D800
Brand: Phottix
SKU: PH33368
Price: 153.40 USD
Availability: Discontinued
Rating: 2 (1 reviews)

Phottix BG-D800M Magnesium Battery Grip for Nikon D800

Phottix MB-D12

Phottix

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Photography

Camera Accessories

Battery Grips

Phottix Battery Grips

Phottix MB-D12 

23% Off: Phottix BG-D800M Magnesium Battery Grip for Nikon D800 Buy now & save $46. Accessory Type: Battery Grips, Compatibility: Nikon D800  / D810

If one uses this thing as for extra battery it is one thing but I also use buttons and that is where problem is. Vertical button is too stiff, it has some kind of the catch so it doesn't go down smoothly and thus multiple shots can be taken instead of one or one shot instead of pre-focus.