Peeling off the shrinkwrap, and the 2500ma Sanyo's fit.
I thought before anyone else is as stupid as I was, to not peel the shrink wrap. The way the cells are in the holder, they all touch and the cells short.
So unfortunately this light goes into the back up light only box, since 2100ma cells dont give me enough runtime, and running Energerizer lithiums(3000ma) are too expensive.
Its unfortunate, as this light had great possibilities as a good primary light in cases I didnt want to use my can light.