Given the size of the D4 or any other Nikon Pro DSLR they have never really been very travel friendly. More so when combined with fast glass and a Speedlight or two. The size of the MH-26 or MH-22 doesn't bother me that much. If I was worried about the size of the charger, I would travel with a smaller DX body and DX glass instead of two or more pro FX bodies and fast glass. Good Luck and Enjoy your Nikons!