Manfrotto is now in the battery business and announced new battery and chargers for Nikon cameras
Manfrotto lithium-ion battery for Nikon cameras (7V, 2000mAh) – will work with Nikon D500, D600, D7000, D7100, D7200, D800, D800E, D810, and V1 cameras.
Manfrotto ProCUBE twin charger for select Nikon batteries (Nikon EN-EL14, EN-EL15, and EN-EL25 )