TrustFire TR-J12 5*CREE XML T6 from DX MF and KD

Bro, just to check, you know about Li-ion handling and safety right? One thing with unprotected batteries is never to leave it unattended. This is needed because quite a few would mention and want "super long life". When the light cuts, you need to run over quick to turn off the light via the tailcap. And i do mean fast within 5 seconds. Sometimes the driver components (usually MOSTFETs) burn out and cut out before that when it fails, so you are safe. Sometimes they flicker and you have early warning.

Oh...this is easy. I wanted to get the XTAR S1 and figured that i could save more with this TR-J12. hehe.... :D

Anyway, some videos of the Sky Ray L1. I think the hotspot of the L1 is a bit larger as well (other than it nets you 700+ lux compared to Trustfire's 500+) Disclaimer : It is just for your info. I cannot verify the accuracy of the tail readings. I repeat, this is for your reference and enjoyment only....

And in this vid, you can see that the 2-cell Sky Ray SR3800 with drop-in taking in quite lower readings at 1.8A. Usually we get like 2.6A with rev 0. And so you also get light that is similar to the Trustfire. My copy of SR3800 is much brighter than the Trustfire. It does not make sense though....2 cells at 1.8A and 3-cells at 1.5A but give off the same amount of light on the lux meter? Some variable is messing things up.

Hmm. Just made the calculation now. I guess you're right. When the voltage drops the current drawn from the cells will increase, but would it still go up to dangerous measures with 3x26650 cells really? I mean I won't push the light onhigh for long but might leave for 6 hours in the mid setting.

BTW, could anybody confirm if this light has under voltage protection for 2xcells? Maybe one who can read Chinese?

Oh actually that boost in current part is ok when the cell drains. I am talking more about driver failures, guess i did not mention that specifically in my post. When the driver fails, there is a high chance it would give a dead short, and most unprotected batteries don't like that and may vent after a good number of seconds. Only some Panasonics can hold up to dead shorts and what you get is a dead cell after that, no vents/explosions. I am talking about the safety part, not the dead equipment part.

Not sure if there is any LV cut and we cannot assume, need to test it out.

First post :-) I went on and ordered one. I guess the LEDs are in parallel since they claim 7,5A pull from driver, 7,5/5=1,5A each and should have about 2750 lumen total, am I correct?

On paper, 1500mA from the driver to each XM-L gives you a total of 2840 emitter lumens initially. Smile Still yet to determine the drive levels, could be the same with Fry Ray L1, could be different.

This gives 2000 OTF lumens, 25% hit by the reflector, 5% by the glass. That is a very conservative outlook. Same answer, need to measure.

The LEDs are in series. All of these multi-emitter/multi-cell lights are. (OOPS - wrong) However, you assumption that they came up with 7.5A from 1.5A per emitter is still probably right. The specs just aren’t quite accurate. It WOULD be 7.5A if it was driven with a single cell. :stuck_out_tongue:

EDIT: I think we're looking at about 3A on 2 fully charged cells and 2A on 3 cells.

EDIT AGAIN: Where are my manners? Welcome to BLF!

Thanks :-), ok I'll measure both tail cap pull and lux meter and compare it to my other lights when it arrives :-) will try both with 26650s and 18650s, let's hope this a good quality light. My other Trustfires has been of very nice quality.

I thought the TR-3T6 was wired in series i swore it was ? but later on some one posted a picture of the emitters wired in parrallel on my thread ?

Hello and welcome.

Call me crazy i like the brand trustfire and all my multi cell trustfire lights are very well driven and regulated with good heat sinking

I haven’t seen that! Can you point me to the pic?

EDIT: Nevermind. I saw the discussion in the other thread. You learn something everyday.

Yeah i hear ya, so if the TR-3T6 has a 3 amp driver ( not saying it puts all that to the led,s ) and its wired in parrallel, it could be slightly possible the TR-J12 could be 7.5 amps wired in parrallel in a perfect world.

[quote=mitro]

POsted in the other thread, but lets write them here again:

Trustfire TR 3T6 has the leds wired in parallel. The driver is a buck regulator of 4,7amp that is the same from trustfire x7 and other sst50 led flashlights. OUtputs about 1600 OTF, this is why it can perform from 2 or 3 18650 batteries. If it was a boost driver, it had to be a buck/boost converter, very very expensive and even good flashlights don't have it!!

This one, i am guessing it has 5 leds wired too in parallel. A new boost 1,5amp driver will cost too much. So ,they use an old, it is a 7,5amp buck regulator(they give this rating already) for all the leds. It is a driver that comes from other sst90 flashlights. I am expecting 2000 OTF, i ordered one too from KD.

good info thanks

The Fryray 3800 had a boost 1.5A driver, but we all know how well that worked out. :p Thanks for teaching me something today, guys.

I'm still excited to get the J12. :)

When there are 6 x XM-Ls in the market, give me a call and i'll shoe-horn 2 x DRY drivers in there and 6 IMRs into the tube and then take cover....thanks!

Seriously the modders have done it like the beginning of the year with even 6 emitters, how to drive 5 x XM-L with drivers properly right to the limit? (no DD pls)

<coughwatchspendingcough> LOL

I have a question ergotelis i thought we could not mix xm-l and sst drivers with diffrent emitters due to some thing to do with vf and voltage, i read it on here some where i tryed to find the thread with now joy.

So tr-3t6 has a sst-50 driver in it and they emitters are in pallel why cant we retro fit a sst-90 12 volt 9 amp driver and bump up the otf and depending on the screw-in drop-in for fix set up for the TR-j12 we could do the same.

p,s i have not looked up the sst90 data sheets

Me to but its the most costly light ive brought sofar and i know i dont need it lols

Ahh....so i guess can mod as parallel. Squeeze 1 SST-90 driver in there to drive 3 XM-Ls and 1 SST-50 driver in there to drive the remaining 2. The SST-50 driver must be able to take 12V though. But i guess high chance there is no space.

[quote=benckie]

I have a question ergotelis i thought we could not mix xm-l and sst drivers with diffrent emitters due to some thing to do with vf and voltage, i read it on here some where i tryed to find the thread with now joy.

So tr-3t6 has a sst-50 driver in it and they emitters are in pallel why cant we retro fit a sst-90 12 volt 9 amp driver and bump up the otf and depending on the screw-in drop-in for fix set up for the TR-j12 we could do the same.

p,s i have not looked up the sst90 data sheets

Yeah, i am excited too! It seems to be quite a good design for a "cheap" powerful flashlight!

No worries about the vF, the drivers are current regulated, for example, you can put two xm-l into series and the vf will be 6,7V and the amp still 4,7amp( i am not sure this driver will allow this, but i am guessing it will)

Swaping a 9amp driver is what i would like to do too! Of course it is possible as long as it fits! THough these drivers are still expensive enough, possibly a small mod in the existing driver might do the job to boost for a while the amperage.

Ordered a UCL lens too, i believe that this 72,7mm might fit. If not, i will trim it for my trustfire x6.

But to be sure, we have to wait for product to arrive, to open it and check it!

More high-res pictures at lightmalls. You can email them to specifically pick a copy that is flawless for you. They did that for my Uniquefire 3900, which really was literally flawless. I also asked the Aliexpress shop to do that for me, lets see if that is really true.

http://www.lightmalls.com/trustfire-tr-j12-5xt6-5-cree-xml-t6-4500-lumen-5-mode-memory-led-flashlight-2-22650-3-22650-2-18650-3-18650

You can see the plastic disc and battery nipple for the head. Not a PCB and no sign of a spring. So that's a good sign, most probably not a drop-in!