A high-amp cell might make sense for the 12V boost version, to keep the maximum output going as long as possible… but it’s probably not a good idea with the 3V linear version. That’ll just give it more extra voltage to burn off.
I’m really eager for runtime graphs of both. I’m actually torn about which I’d prefer (no, I should not get both).
You can easily get adapters/holders for 18650s to make them fit in 21700 devices as well. Many ecig/vape shops likely even have some for sale now that many devices are moving to the larger cells.
Hey Hank,
are there some news for release date? Id like to see the K1 under my christmas tree 
Thanks! Michael
+1 
Thank you
Excited to see this light 
Can’t wait for this to be released. Any news lately?
Interested
Things got delayed, but it should be out very soon if I understand correctly. I have a tracking number for hardware so I can do the final calibration on it, and then I’m guessing it’ll be available to buy almost immediately afterward.
One nice side effect of putting easy flashing pads on it is that hardware can be manufactured before the firmware is complete, and then items can simply be updated before shipping.
TK will you post a review for this light?
I’ve been following this thread closely. I can’t wait for this to be released.
Same here. My D1 is fantastic!
Beautiful!!! So nice to see a new Noctigon
Nice color options too.
Awesome. I’m definitely getting the white and red LED variants.
Thanks for the photos Hank! Any new details to share?
Yes, that’s the plan. I’m hoping to answer everyone’s questions by posting a lot of details and pictures of the new light.
Very nice! I want one!
Is that an auxiliary LED, or are there coloured main emitter options? Pretty awesome if an auxiliary was somehow crammed into the head.
I believe it’s red and green main emitters. That’s all…