1100 lumen 16340 klarus Mi1C Resistor Mod

I guess your referring to a beam shot pic. I dont have any at the moment but I have some Efest IMR 16340’s on the way that are rated for 5 to 7 amps continuous (depends on the seller). So I’ll wait until I have those to use. I have several of the top rated 16340 batteries from HKJ’s comparator but none work good at a 3 amp load, to much battery sag. Seems they haven’t really designed a high current 16340 yet that I could find. The driver I’m pretty sure has a low voltage step down, so when the battery sags below say 3v the driver steps down to high, thinking the battery is depleted but its not (to much voltage sag).

The best I found by description was the Efest IMR 700mah (red) or the Imren IMR 700mah (blue). They haven’t been tested by HKJ yet or anywhere else I could find, so I’m not sure what their going to do, but I do plan on testing the Efest 700’s when I receive them. I noticed they were popular with the vape sites, so that’s a good sign since that’s a high current device. I may buy some Imren’s to try also. Probably just the same battery given their both 700mah Imr’s.

I tested the Efest IMR16340 700mah(red) and there no better than the klarus LIR16340(red) or the fenix ARB L16-700. They all dive pretty quick in voltage at a 3amp load. I get around 300mah at about 6 minutes out of any of the 3 at a 3v cut-off. Trustfire seems to be about the best 16340 at the moment from HKJ’s testing, I got four on the slow boat to try next.

Nice Mod :+1:
The Yellow AWT 16340 cells are great, I’ve been using them for a while now whereas the red TF cells were good at first some failed quite fast at high draw. YMMV.

What is the resistor size?
EDIT:
Far smaller than 2512 that I have here :confused:
1206?

1206

This one CRX?

That’s them.

Ordered 3 to try out. :+1:

Interesting insight. Me and a friend recently hairdryer rewrapped a couple TrustFire IMR14500s and seems like the heat killed 'em. Quite disturbing.

Cheers :-)

Thanks.
I was careful unscrewing the plastic, but nevertheless I slipped and ripped some resistor and some other element.
It’s funny to see strobe running with moonlight level .

OK, will have to repair. But first another question:
Without split ring pliers, what’s the best way to unscrew the bezel?
I tried tweezzers, couldn’t do it. I tried friction, didn’t work either.
I can glue it to something and then polish the glue off but that’s quite a lot of work…

You just need a cheap blunt nose set of needle nose pliers usually a dollar at most hardware stores.
The nose is rounded except where the pliers contact, it’s ground in a D shape. They fit in the round slots on the bezel.
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A cheap pair of these should work fine with a blunt nose.
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https://www.ebay.com/itm/Precision-Beading-Pliers-Tool-Kit-Set-Jewelery-Design-Bent-Nose-Cutting-Needle/162575785598

Bought model 359A a few months ago, tip diameter is less than 1mm. Handy and sturdy enough.

Cheers

Managed to unscrew the bezel with a grinding stone. Pressed the bezel hard against the stone and the friction was enough.
Unsoldered leads, no problem. Couldn’t unsolder the ground though. Too little power? I use a large screwdriver type bit, 410 °C, 50W iron. Is the iron too weak?
I weakened the connection, moved the wire a bit to the side with the iron and then cut with a knife.

I re-soldered one of the elements that I ripped off. Now I think it was not a resistor but a capacitor. That thing is TINY.
I moved the other into place - it seems I bent the legs, but haven’t broke them (not sure).

What is the simplest way to test if it works now?

According to my plastic calipers the lens is 13.1 mm.
I wonder if we can find AR coated replacement…

I don’t know if you will find one in that size but this one could be sanded down to fit.
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https://www.fasttech.com/products/0/10001022/5422711-14mm-ar-coated-glass-lens-for-led-flashlights-diy
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I just sanded down a lens the other day to fit my triple xpl DQG 4th because I couldn’t find the size I needed.

Best 16340 batteries I have tried so far. I ran a 3 amp test on them and I got 400mah to 3v. Would have been more if I had lowered the cut off voltage to 2.7v. Thanks for the recommendation CRX. :+1:
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I still have some trustfires on the way to test when they get off the slow boat.

Thanks, but this light has only a plano-convex lens.
I failed to find any AR-coated one that could fit. Though I may try harder at some point….

I’m guessing you have the aluminum version. The Ti and Cu version has a reflector with a AR coated glass lens.

Cool, would be nice to see how the TF performs too :+1:

Yeah, I have Al. It’s uncoated plastic. I’ll see, if I get deeper into this light I may get a Cu/Ti one or ask Klarus if the are willing to sell me a coated one.
Thanks for the good news.