HS-802 Upgrade

So I’ve had a UniqueFire HS-802 with the XR-E R2 LED for some time now, and I always liked it. The XR-E puts out a nice thin beam, but compared to the lights I have now, the tint isn’t quite right, and the beam was a little too ringy for my tastes.

So, time for an upgrade! The HS-802 to start with:

I went to Mountain Electronics website, and got a QLite 3.04A driver with 2 of the 7135 chips removed, and an XP-G2 S2 2B LED on a 20mm Noctigon.

First, I prepped the brass pill for the LED:

Next, I spent 20 minutes with the dremel, letting the star cool in between passes. I got the 20mm star just to the point where it started to stick when putting it in the pill. I then covered the surface in thermal epoxy, and press fit the star into the pill. Now, when I say press fit, I mean I fiercely hammered the star into the pill (since I don’t own a vice).

Like a glove!

I had to use a diamond bit and expand the wire holes against the side due to the large size of the star, but it all worked out.

Looking down that deep smooth reflector:

And of course, what would a build thread be without beamshots? I don’t have a DSLR camera or anything, but I make do with what I have. Hehe….‘make do’.

Shining at my closet (my camera sucks, the light is pure white to my eyes, no blueish as the picture looks like):

My multimeter measures 2.28A off a fresh 18650 at the tailcap, which is basically right where I wanted the current.

Outside. Control shot first, obviously.


It’s been a bit since I did anything like this, but man it feels good when it all works how you want it to. Thanks for looking!

Nice try!

By the way with 2.28A you don’t actually need the Noctigon. Conventional aluminium board with dielectric layer can handle it already IMO.

Lol, there was no try, I ‘Did’. And why wouldn’t I get a new LED on a Noctigon? It was only 4.09 plus shipping from somewhere also in the USA…

And that way when you feel like cranking up the amps you’re good to go!

Guess I was mistaken about the amperage I could have in this.

Fortunately I have 7135 chips on hand lol. Project for another day.

Ok sorry I stand corrected. I didn’t mean to be rude. :beer:

I have some XP-G2’s on the way, what is the Max you can push them too? 5-6 amps?

So I put 4 more 7135 chips on it (10 total), and it’s noticeably brighter, but I’m going to need to open up my multimeter sometime and get some thick gauge wire in there or something. Can’t hold a solid reading for even 2 seconds and jumps around a lot.

Should be somewhere around 3.8 amps at the LED now factoring in any kind of losses that may be present, but won’t know until I look at my multimeter.

Damn…

So I modded my multimeter with very thick speaker wire, and it reads solid as a rock now, which is great.

Problem is, the tailcap reading is only 2.6A still. Must have ruined some of the 7135 chips. Oh well.

I’m going to order a new driver with more amps. So, looking for some advice please.

Going by my setup, how much current can I put through this without worrying about damaging the LED? It would mainly only be used for short bursts, maximum of a couple minutes or so at a time probably.

Sweet spot for XP-G2 is around 4.5-5 Amps.

You’ll need to do resistance mods to the driver/tail springs as well….& a capable battery.

Thank you very much :slight_smile: