I have a question. Don't want to bother Gene with it. Folks have been pleased that the MDC is a great battery vampire for primaries running them dry to get the last bit of light. In the past I have heard that this is a bad thing because as voltage drops more and more current is pulled until amp draw is too high for battery resulting in vent. Why does this not happen in MDC?
The MDC lights don't appear to be pushed as hard as other lights. For example:
The single primary MDC is running at 250 lumens, and that is plenty fine for a primary.
The 2 primary MDC runs on 2 primaries at 450 lumens; however, the turbo runtime is roughly 15 minutes. There are other better battery options available for this light (posted on the website).
I am building my light, and I'm going to use a RCR123 from AW (protected)
To directly answer your question- I believe that the reason this doesn't happen is because the lights are regulated. Well... regulated until the battery is at a safe voltage for direct drive. This protects the battery and the LED. I am no expert, but I thought I would try to chip in.