The Nikon N8008 (and s, and F-801) usually used 4 AA batteries. I think there was a different holder that let you use a lithium battery, but it's less common. Normal AA alkaline batteries should work, but they may have to be pretty fresh. I don't know about 1.2v NiMH AA batteries. I am not familiar with any AA-size battery that delivers 1.8 volts, and it certainly didn't exist at the time of the N8008.
The battery holders on these sometimes get corrosion or oxidation from old batteries, so cleaning the holder and the terminals in camera gently is a good idea. Don't break the holder.