Regular Millenium. I'm not sure what it was. I didn't use the NiMH setting, because there were problems with that cooking your packs, and I never got the updated version. I just did a linear NiCD charge with 4mV/cell peak detect, and they got really, really hot if I let the charge go all the way through. Now I have perfect charges, so I'm not too worried about the Millenium anymore.
-Josh