Well - you guys really hashed out about every angle for calling Dinotte dumb-trucks. My previous post tried to point there was more to Dinotte light heads than on/off and or power setting.
And I still don't see a schematic of any of there products. One sort of "test" does come to mind regarding mixing battery sources and light heads. If a Dinotte light head displays the known "correct" self test flashes when hooking up a non-standard battery - I would go along with the idea that the light head circuits are robust enough to utilize a particular battery source a cyclist improvised. If it doesn't - then who knows?
I just completed an "all night" bike ride and by using more than one light and battery source I never had to switch out a battery source so at this time I'm "dee-lighted."