What do you thing is appropriate, the Samsung 48G which can do 10A continous? Maybe the 40T which should do 20+A continuous?
The 40T would be the best balance between power and capacity, especially in a triple FET like this.
Kind of like a 21700 30Q.
If you want a regulated driver however, the 48G would be your best bet.
And the 30T would be kind of dangerous with low enough resistance contacts at startup.
You sound undecided.
I thought you just bought some. We’re you just exaggerating? Lol
If not, what did you buy and did you get a decent price?
Since I already have 20700A cells, I’m still undecided whether I should just buy 21700s, or just use it with 20700As. I do not like buying excessive amounts of cells if I already have a bunch of almost new ones.
I didn’t buy it in the end on the Sunway store: https://www.aliexpress.com/store/product/Free-shipping-Original-Sunway-21700-3-7V-4000mAh-40A-discharger-Power-batteries-Li-ion-Rechargeable-Battery/3173029_32855373702.html?spm=2114.12010608.0.0.5d7d69d4sKl14V
These are based on the Samsung 40T 30A rated cells.
Apparently, they are legit and ship to Canada, but I think I’m just going to stick with using my Sanyo NCR20700A cells, and not buy any 21700s, for now anyway.
I would use 20700 for now and wait at least until Sony shows their 21700.
I just tried a Samsung 30T in a Lucky Sun F3X that has 3 XP-L emitters, tail current was 14.1A.
Oh. That is not so bad after all.
14A is a lot of current after all, and other parts of the light are going to offer higher resistance if the springs are bypassed with thick 18AWG wire.
That is why I don’t really want double switch. The clicky will add resistance and maybe melting down under those high currents. I know Dale has plenty lights without problems but I had a triple Nichia VG10 with 15A current and it melted the switch completely.
Cool that they went with the 21700, this will possibly be my first 21700 flashlight, so now I have to find someone who’d ship a 21700 cell to my country 
My suggestion for UI: run Andúril!
My plan B suggestion for UI:
- click from off to turn on at minimum
- hold from off to turn on at memory (doesn’t memorize moonlight, turbo or blinkies)
- hold from on to turn off
- click from on to change modes, modes should be Moonlight >low >medium>high (highest possible with no septdown) > turbo (highest possible, stepdown to high or medium)
- double click can be shortcut for something
- blinkies optional
There is the Sunway store link I provided earlier. Apparently, using Turkey Post allows to circumvent easily and legally lithium ion shipping regulations:
https://sunway.aliexpress.com/store/3173029
Also, Banggood ships 18650s everywhere now! I can even order 21700s cells now from Banggood in Canada:
Not just that, but any make/break cycle will go melting off little bits of the contact. That’s a danger for any high-current light with a clicky, but moreso if you’re throwing a 21700 at it going full-tilt.
And with each pit that forms, resistance starts sneaking up higher and higher, a teeny tiny little bit at a time.
Something like (Lexel’s?) FET-switch would be a good way to go.
Not sure if it was mentioned but with this new cell people are going to want to try play around with emitters I imagine. Can you see if they will make a 32mm mcpcb fit without filing? LED4Power has some 32mm 4040 boards coming out and 32mm 5050 options exist too but are hard to find.
They do sell a 30mm triple MCPCB though made specifically for the C8F:
https://www.aliexpress.com/store/product/C8F-DTP-Copper-MCPCB-30MM-Direct-thermal-path-for-triple-LED-diodes/2933049_32847291392.html?spm=2114.12010612.0.0.7a26301ds1gqUv
Yes but it already comes with that and it is only one footprint and I have a feeling they are not going to make a custom 30mm board just for modders in other footprints.
Ooh okay.
I try ask them to sell more MCPCB types.
What emitters are you guys going to try on this? I’m thinking XP-L2 and 319A seems like the best options.
Samsung LH351Bs 3000k with a regular 3A driver.
Would make for a nice everyday light, especially with a diffuser.
I would like to use Luxeon V since 32mm 4040 mcpcb is in the making. If a good boost driver ever gets to be public I would like to try 3x XHP something.2 but those require new mcpcb also. Part of my reasoning for wanting a more standard pcb size.
That’s odd Zozz, I have used mini Omten switches easily up over 21A with 4 Nichia 219C’s without a problem. Didn’t melt a mini Omten til I hit 32A. Are you sure you didn’t have a short? That’s about the only way I’ve found to melt an Omten without ridiculous amperage.
I built the first Triple Eagle Eye X6 using a Ledil CUTE-3, several years back now, and have built dozens and dozens of triples and quads. The switch was never an issue.