Emisar 21700!!!

21700 doesn’t interest me. I invested in a bunch of 18650 cells already and they will last many years before failing.

So 21700 has more capacity…great but most current lights have inefficient drivers so I can stick with my 18650s and simply wait for better flashlights to get more runtime.

That’s been pretty much my same POV for a long while, but I do like, for example, the 21700 version of the C8F, because to use a high-draw cell in it properly, any 18650 would likely be 2800mAH at best, while the 21700 is almost double that.

And it just looks better, given the bigger head. An 18650 tube on a C8-type light just looks kinda skinny on it. At least the thicker tube from the 21700 gives it a bit more “balance”.

And I can always drop in an 18650 even without the sleeve.

Glad I clicked……

I want 21700 + D4 UI + boost :smiley:

Just make new battery tubes that are threaded to use the original head and tailpiece.

Yeah, the big problem with li-ions is how low their capacity is compared to alkalines.

This. I think someone on this forum even converted their D4 to use 21700 just by boring out the stock battery tube.

Actually if you compare the capacity of different battery types, li-ions hold considerably more energy than alkalines.

Energy is measure in watts.

Watts = Voltage * Amps

A lithium ion cell might have fewer amps than an alkaline or eneloop, but may still hold substantially more energy because the voltage is higher.

+1. My dream light.

Um no…Whatever it would be don’t use the current D4, it doesn’t even have RVP.

How about a quad with aux LEDs, copper head, that limited blue color, and 3000k LEDs. Cha Ching!

I’m not sold on the copper head. I have the copper-titanium D4. It looks beautiful and feels great in the hand.

But it’s sooo heavy. I feel it bumping around in my pocket due to the weight. It’s heavy enough that it actually caused a pen I had in my pocket with the light and my keys to drill a hole through the bottom of my pocket. That doesn’t happen with ligher weight lights.

Hmm… I EDC a D4s, so the added width of a 26650 isn’t a big deal. But I really like the size of my EC65 and I wouldn’t mind more lights in that size.

The other issue is a lot of “tube” lights try to keep the reflector the same size as the battery tube so there isn’t a jarring transition (D1S). A 26650 light would allow a larger reflector resulting in more throw, but once again 21700 lights are slimmer and have I mentioned I really enjoy the size of my EC65?

So… Sofirn SP33?

Tomato-paste can (vs sodypop-can) light that takes a 26650.

All the fancies like a lighted side-switch, battery indicator, etc.

Does a 21700 light really need a new driver?
The 18650 drivers (can be ) fine. If higher turbo is needed take 26650 driver.

For me personally it’s about the extra runtime. Not the extra lumens.

Impossible to answer that question without all details.

I’m always looking for the ideal runtime vs output vs size ratio.
A light with big head I won’t even spend $1 on. (my 26650 light is more compact than many 18650’s)
Runtime is another big deal for me.

While nice lights (looked seriously at the 18650 version) it seems to be geared to much to a turbo monster which is of less intrest for me.

21700 tube with a pocket clip for the D4S…yes, please!

I asked Hank and he doesn’t have any plan for a 21700 cell tube

It would be very easy to make one that threads on the D4S head, though

I don’t like the E07 so I think I’ll stick with my D4S

Would love to see a 21700 tube for the emisar series!! Now I´m thinking firefly, though I´m happy with my 2 D4´s and the D1s…

And topic died…? :frowning: One thng about 21700, they are stronger than 26650 and 18650.

Noctigon K1 uses a 21700 battery.

which 21700 would you recommend for k1

If you have SBT-90.2:

All other emitters: