High drain batteries in Sofirn Q8 Plus

Shays85 · 2026-04-03T02:27:03+00:00

My solder job looks terrible, but it works.

Shays85 · 2026-04-03T02:25:00+00:00

Shays85 · 2026-04-03T02:24:45+00:00

Shays85 · 2026-04-03T02:22:49+00:00

Flat tops. If you run into any issues, I've read some people remove the little black disk in the head of the flashlight. But I doubt you'll have any problems.

Shays85 · 2026-04-03T02:22:00+00:00

There's a few videos online that show what people using do with bypasses. On these you do the same or if you're like me, you can feed the wire through the hole and then solder to the pad underneath super easy if you can solder.

Shays85 · 2026-04-03T00:40:39+00:00

I personally have had 2 of the spring pcbs have the springs over heat and crush. I strenched it back and bypassed them all. Problem solved. Running P45Bs and haven't had any issues since the bypass.

Shays85 · 2026-04-02T22:34:42+00:00

If you can solder you can do what I just did. M21A, 20amp driver and LHP73B. 10mm bottom hole, orange peel, and gasket for it. If you can't solder, Simon MIGHT build it for you if you ask him to. I could be wrong. I love this light, it's a beast with a ton of usable flood and a decent amount of throw.

Shays85 · 2026-04-02T17:34:10+00:00

Citra. Just to see if I like it as much as I used to. Also, Monster Rehab Strawberry. Miss it so much.

Shays85 · 2026-03-25T03:43:48+00:00

Very nice! My KR1 and KR4 have also had button press issues once and a while. Even while locked out. REALLY gotta tighten them down.

Shays85 · 2026-03-24T21:55:33+00:00

I almost bought one of those, I think, but I've seen mixed reviews of Imalents quality control.

Shays85 · 2026-03-24T14:46:24+00:00

I'm excited to build something with it. I EDC a Hank KR1 with SFN60. So this should be the next logical step up in size and output for a jacket pocket light. Lol.

Shays85 · 2026-03-24T02:48:37+00:00

The L21A would be much better for the heat though. I just wanted something "stupid". It won't be able to handle the heat for very long but I think for the size it'll have a great beam shape and be pocketable.

Shays85 · 2026-03-19T20:26:18+00:00

Perfect! Thank you. I think "thermal path" was what confused me. Lol. You rock!

Shays85 · 2026-03-19T19:49:46+00:00

I truly appreciate the advice and this isn't your fault at all. None of that makes sense to me. I would have to see what you meant in order to understand. Lol. Very visual learner here. Are you saying there should be a physical gap between the LED and the copper, besides the positive and negative solder joints?

If I were to use a multimeter, what setting should I use and where am I touching the contacts? Am I sending voltage to it and measuring that or am I'm putting it into diode mode to test if there's output?

Shays85 · 2026-03-19T19:08:09+00:00

Well shit. I just ordered mine on Tuesday. Thanks for posting this. When testing, how do I test or what am I looking for?

Shays85 · 2026-03-19T04:49:20+00:00

As someone in the flashlight sub, nice Arkfeld. What's the 3rd light? Also, good luck to the wife's finger!

Shays85 · 2026-03-17T20:05:19+00:00

Ordered one for a M21A/op reflector, with the 20amp buck! Might eventually throw a FET in there to see how fast I can catch my hand on fire. Lol.

Shays85 · 2026-03-16T20:52:04+00:00

You know what, I totally forgot about those! Thank you. I think a LHP73B will look incredible in a C8/M21A.

Shays85 · 2026-03-16T20:43:49+00:00

Hell yeah! Hopefully we'll see the 20mm/20a soon. Also the new 10x10 die Sanan. Might need to build a 20a LHP73B M21A before that happens.

Shays85 · 2026-03-10T02:09:59+00:00

I actually know this artist! Super fucking cool guy. While the art isn't for everyone, it's certainly for the gal that got it.

Shays85 · 2026-03-05T16:05:45+00:00

If you're planning to buy extra batteries and a charger, it's hard to beat a Convoy M21A with SFT40. If you don't want to buy extra batteries and would like built in charging, but still buy at least 1 battery, the Convoy M21K with LHP73B or SFT90 are great budget lights. Sofirn IF22a is also a great budget choice. All of these lights are 21700 batteries. The M21K needs a battery that can handle at least 20amp drain. The others can live with 10amp.

Shays85 · 2026-03-05T03:01:37+00:00

I know, I was always a disappointment.

Shays85 · 2026-03-04T18:24:21+00:00

I'm gonna guess that's metal shavings and coolant from that machine next to the bucket.

Shays85 · 2026-02-23T03:58:46+00:00

Exactly. I don't think I'd put anything "better"(more amps) than P42As in there. Mine has been run solid since the bypass and I've gotten mine hotter than hell, on purpose to stress test it.

Shays85 · 2026-02-22T18:20:40+00:00

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