[ENDED] Group Buy: 46mm BLF SRK 7135 V2 - 32x 7135 Drivers - No Drama!

One for me.

I’d like to know this too. Can anybody make a recommendation? Link if possible!

Well the SupFire M6 Richard sells is bout the best SRK. I got a FandyFire and another clone needing some upgrading, so not a problem for me. I'm not interested in finding/buying any others, mainly because of exactly these unknown quality problems out there.

Oh, I was unaware that the Supfire M6 was a SRK clone. I thought it was a different style light.

The M6 is a beast, for an SRK that is. It is one chunky monkey, and has a beauty of a driver retaining ring, so no glue needed to secure down the driver. Easy to mod, SS bezel, excellent pill top/shelf for mounting LED's on copper MCPCB's, etc...

I got one I did a ways back and it does like 5000 lumens w/UCLp lens, FET driver..

So, are you saying that this SRK driver board will fit in the M6?

May be a silly question, but e-switch or mechanical clicky? Also what’s the voltage input range?

Either way put me down for one. Just trying to understand what I’m buying. Thanks Richard.

I'd say it is an upgraded version of the SRK, better in almost every way.

... The timing on this group buy is painful. I've spent waaaaaay too much on flashlights and parts in the last month.... But I'd really like to upgrade a quad, or maybe that M170.... Hmm. I'll have to think more on it.

A SRK style light uses an electronic side switch and four 18650 cells in Parallel, meaning 4.2 volt max. 7135 drivers are linear, meaning input and output voltage is the same.

I can attest to the fact that these are great drivers, if you want to make a 3x led SRK into a very bright light with about 4 amps to each led.

I don’t doubt your information, but when I looked at this GB, I also wanted to know the max input voltage, went to the store and found another driver with a very similar name that stated among its features:

  • Low-voltage protection for 1S, 2S, 3S, or 4S cell configurations -
    Input voltage must closely match output voltage; this is NOT a buck or boost driver

Richard, can you clarify?

Sign me up for one please.

But, is there any way I can get just a “little” bit of drama? I mean, just a twinge of drama would make this deal absolutely perfect!

I think you two are saying the same thing. If you feed it with 3s 18650 you need to have a series triple on the output. That’s what I thought and I think you two have confirmed it. Thanks guys.

So another question, which is better: 3s cells and noctigon or 3p cells and noctigon?

An SRK has the batteries in parallel, 4.2v max. This driver can also be zener modded though, meaning it is still linear, but can be used in other custom projects to use 2S or 3S batteries to power 6v led’s or other emitters in Serial.

This version actually has an LDO option on the battery side so it can be used with 2S configurations as well, with very low parasitic drain. I don't recommend using this with any 3S setups. I just updated the OP with this information.

@OldLumens: Justin, it is good to see you here! I missed having you around. I'm subbed to your YouTube channel and still watch all of your uploads.

E-switch. 1S or 2S, but hardly any stock soupcan lights use 2S (actually, none that I'm aware of).

Is this the same driver in the SRK you sell, or an option for including in it?
I’d like this in that, count me as yes for one driver.
http://www.mtnelectronics.com/index.php?route=product/product&product_id=250

I usually modify the existing driver on the M6, but this will also fit once you file down the tabs (all lights will need these filed) and work to give you a regulated ~4A per LED and low moonlight.

Sign me up for two

3 please

Will this fit in the Ultrafire UF-T90?