I have been thinking of buying a battery grip for my D80. I think that the orginal one is a bit expensive and was wondering about the Phottix ones. But maybe I will try and buy a orginal one used instead. For those of you using the orginal grip, do you use only orginal batteries too? I have 4 Phottix batteries for my D80 that I have had for a long time and have had no problems with them. But I only have on orginal battery for it. So if I can not use my Phottix batteries in it, I would rather by the Phottix grip.