TrustFire 12X Need some MORE Mod help...please!


Well I had this thing torn apart all this time and woul appreciate some additional advice on modding this thing for beastly output.

Ouchyfoot…how would you wire the emitters with the driver you recommended?

18Sixfifty…any more thoughts on your bridge suggestion? I’m afraid of messing up the driver…


I am trying to access the driver/wiring side of this beast. On the positive spring side, there is a retaining ring. However, once removed, the driver will not screw all the way out cuz wires twist/bind up before it can get to the end of the threads. On the business end, after the bezel is removed, the reflector won’t budge.

Could use some help!


I might be able to help, is this the 12x XM-L TrustFire AK-90? A picture or link to the light might help me help you!

This is it right here.

Are you sure it needs to screw out? Most of these simply pop out if you can line them up correctly and pull straight up. I had a couple of them that were a pain in the back side to get out but all of them eventually just popped out once I pulled hard enough straight up. They tend to bind up and it seems like they need to screw out when they really don’t. They were just pressed into place very tightly so the threads catch at the sides of the contact board.

On the Bezel it should unscrew but some of them are also very tight. I take a piece of wood (my back scratcher actually) and push it down onto the bezel top and use it as a lever to unscrew it. I know the top ridges on the bezel don’t line up perfectly and they are kind of smooth and not straight up and down. But generally if you push down with something like that, maybe a ruler would work too. I’m not sure if I’m explaining this right though because it’s hard to explain. Just putt something across the top of the bezel so that it catches in the wavy parts on top and use that to unscrew it with. It doesn’t seem like it will work at first because it likes to slip off, but if you push down hard enough it will eventually bite in just enough to give you the leverage you need.

Hope this helps.

I have tried pulling and pulling on the driver spring to the point that I felt that the spring would stretch/break off at the solder.

The bezel comes off quite easily. It’s the reflector that won’t budge.

maybe the Reflector is screwed from the driver side?

try to lift the driver only on one side (like flipping a coin)

Got it with a combo of pulling, unscrewing and rattling back and forth…sheez! Thanks guys!

Looks like there’s a screw down in there to take the reflector off.

BTW…this think looks anemic when turned on. What is the best way to up the output on this beast???

Probably heavier wires and a spring mod will help. You could also take a pic of the driver there might be something that you can do there like jump a resistor.

Oh and yep. They all have a screw in the center, some have a second screw as well.

Chances are these are already wired in parallel but you can check that as well. If there is anything like 4S3P going on you can change that around to 3S4P and that will give you a boost. If you can take a picture of how they have it wired that will help too.

Here are pics of driver:

I removed the internal screw, but reflector still will not budge. Any ideas there?

Hmmm I haven’t seen that driver before but it looks like you should be able to jump the 476. If it was me I would solder a small piece of copper wire directly over that resistor from one end to the other. But then I also have a bag full of dead drivers! I don’t have the knowledge to say exactly if it will work or not. Someone else might be able to help. Like I said, I would give it a shot but I’m not sure you want to take the chance and end up with a dead driver. If you do try it, you can always test it first with just a short burst. I know this is cheesy but I tape three batteries together with wires on the positive and negative and touch them to the driver after I do a resistor mod. Just for a second and longer if nothing bad happens. If you screw the body on and hit the button you might not have time to turn it off before you get the dreaded burnt smell of death.

As for the reflector make sure the O ring is out of the way and if you have an ice pick or something like that you can tap on the reflector from the bottom, this will usually knock it loose.

You mean tap through the hole that the screw was in?


Pic of LED wiring…

If I were you, I would order a Zener modded FET driver from RMM and wire it 4P3S.

I used the FET driver in the almost the same light, but with 9 x XML wired 3P3S, and it blew me away. Here’s the link to My Light

Worked like a champ…thanks!

Glad to help.

Ok it looks like you have four wires comming up to emitters that are positive and from each of those four they are branching off to two more emitters. So it’s 4P3S You can go to 6P2S and you should still be safe.

That would meant that the positive comes up and is connected directly to Six emitters on their positive and then from each of them to it’s own separate emitter also positive. Then do the same with the negative.

I’m not very good at explaining this so if you don’t get it let me know and I’ll try and draw you a diagram.

Before I mod this…what batteries would best suit it?

To really put out the lumens after modding…are my protected 3400mAh 18650 pannies ok…or should I jump up tp 26650s?

If so…they need to be protected cuz light is in series…correct?

Anyhow, I reckon i need to buy a matching set of 3. Wish I could find the new KeepPower protected 5200mAh 26650s somewhere…or, is there a better battery for this application?

Bump…some help with post 16 please.


These aren’t protected but so far have showed the lowest internal resistance and the highest capacity. They are replacing every other 26650 I have. Run your light on medium and monitor the volts until it starts climbing too high or shuts off. I’m finding a lot of big multi cell drivers cutting off at around 3.1-3.4 volts per cell. With a low voltage protection built in you’ll know the amp draw at shut off. If no low voltage protection I’d use at least one protected cell.