Nikonian72 wrote:
My Nikon SB-600 speedlight is attached to my Nikon D5000 for several hours at a time, when I am in the field capturing macro-photography. I carry extra batteries because I leave both "on" so much. I have never had any problem with speedlight reliability.
I shoot manual flash for macro work, usually 1/1 output, sometimes 1/2 or 1/4, depending on subject color. I store both units separately, turned-off.