Why no 4 x 21700 flashlights?

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Anthon
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Why no 4 x 21700 flashlights?

I’ve been waiting for more than one year for a good 4×21700 searchlight. The only one I know is the Thrunite TN50 and it’s too floody

Most of these lights use XHP70.2, SBT90.2 and other big leds that would benefit from having bigger cells

Acebeam K65GT, X65GT, Manker MK35 II, etc, those light would be much better with 21700 cells

I don’t think that the size would be a problem, because if we look at the Thrunite TN50 (4×21700), the body diameter is 58mm, whereas a 4×18650 is around 50mm, those 10mm won’t make any diference in handling when the head is 80mm or more

The cost of good 21700 cells isn’t much expensive than 18650, and a 4×21700 setup can be equivalent to 6×18650

2A
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I assume that this would be a matter of time, not technical feasibility. Maybe the manufacturers are waiting for a more adequate general availability of 21700 cells or better market penetration.

Again, this is an assumption.

Also, I don’t know how large the market would be for heavy, tough, super-duty 4×21700 searchlights which cost xxx $ US.

Maybe first responders/LEOs, border patrol, hunters, outdoor enthusiasts etc

Henk4U2
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Those 10mm would make a difference. My Q8 runs on 4*18650 and has no battery carrier. My thumb can just touch my middle finger. I think the q8 is a magnificent light, but I have had some thoughts about buying a 3*18650 light, for reasons of better handling. A 4*21700 light would be way too big to handle proper. I own a GT, but I think it is a bit clumsy light.

You are a flashaholic if you are forced to come out of the closet, to make room for more flashlights.

Sirstinky
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I think they are selling more single 21700 lights than multiple ones. As 2A said, the market would be small for them as the only ones buying those would be enthusiasts or professionals needing something like that. Really the only thing an 18650 gives up is runtime and current handling (fewer cells needed) at the cost of size, weight, and expense.

peg matite
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Henk4U2 wrote:
Those 10mm would make a difference. My Q8 runs on 4*18650 and has no battery carrier. My thumb can just touch my middle finger. I think the q8 is a magnificent light, but I have had some thoughts about buying a 3*18650 light, for reasons of better handling. A 4*21700 light would be way too big to handle proper. I own a GT, but I think it is a bit clumsy light.
Thumbs Up

My 3×18650 SP36 Anduril gives me nagging thought that someday I may get rid of my Q8.

Sirstinky
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Henk4U2 wrote:
Those 10mm would make a difference. My Q8 runs on 4*18650 and has no battery carrier. My thumb can just touch my middle finger. I think the q8 is a magnificent light, but I have had some thoughts about buying a 3*18650 light, for reasons of better handling. A 4*21700 light would be way too big to handle proper. I own a GT, but I think it is a bit clumsy light.

Add to the fact there aren’t too many lights that could benefit from the added size and weight. The multi emitter and high output lights like the GT or something like MS12 or 18 from Imalent or MS06. Anything needing over 120 watts output would benefit from 2 or more 21700. Although there are more and more lights coming around with that need (sbt90.2 throwers or multi emitter 70.2 lights) it’s still a small market portion. I also consider a single 26650 that has similar (or more) capacity and current handling as a 21700 in a shorter form factor. If 18650 cells get better with current and capacity, then doing a 21700 over a 18650 might be a harder sell?

texas shooter
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Google Trustfire TR-S700, it’s a triple 26650 light that works in its format. Quad 21700 lights are going to light up the night.

mortuus
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there should be a blf q8 but with 21700…

...where Frugal meets with Flashlight!

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Pip
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Why no 18 × 21700? And make that 18 x SBT90.2 with k1 sized reflectors. 100k lumens at 7.5mcd. We can call it the MSF018S90. Aux handle of course. Unless you have lunchbox sized hands. And heck with the driver, one giant FET with the gate wired to the switch. Turbo is all I use anyway.

Sorry, I got carried away a little bit.

Lightbringer
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mortuus wrote:
there should be a blf q8 but with 21700…

The difference (diameter) between 4×18650 and 3×21700 is negligible. So… same body, just bore it out differently.

Going to 4×21700 would be so much bigger that only people with huge hands would want to buy it.

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