There are some documented cases, a good high profile one is that Trustfire X6 and of course that Solarforce L1200 incan. Unprotected ultrafire and not sure which one. Happened just last year bro. Even IMR could vent (Sony Knion, the green IMRs).
This is why 18650/18500/14500s are not consumer products that are sold in counters. It would be nightmarish for the manufacturers with regards to lawsuits.
"Updated" Fandyfire version with deeper reflector. Looks interesting
Need help with drivers:
Are there any 4,2V -> 8,4V drivers suitable for this, with max two modes, no strobes?
Having problems to find any 8,4V suitable for this and enough juice for XM-L...
One of kaidomain will fit, I will try sst-50 driver, 3 xml driver is fine, gives more light, but overheats quickly without beeing sunk in thermogrease.
Got link for this?
http://kaidomain.com/product/details.S020121
It is 3 mode, but you have to live with it :) If you want to use it, you should put it all in thermal compound, otherwise thermal protection will turn on quickly.
I want to try http://www.dealextreme.com/p/8-4v-sst-50-5-mode-memory-circuit-board-for-flashlights-50025
It should be more balanced and not overheat that much, it lies on my desk, only time is missing to check it ;)
kai is not much if smaller, I thing they are same size...
If you use the DX SST driver be sure to mod the tube on the end that changes modes with the old driver. Remove material at the end of the tube so the threads bottom out and tube end does not make contact with driver. Another solution might be an insulator washer. Not heeding this suggestion may result in a direct short. Don’t ask me how I know this information. YMMV 
Yeah, thanks, I was wondering where this short is, because there is. Light is visibly brighter, on meter it is only 5-7klux, but it is visible :) I will try to make a washer today :)
yeah really, the head looks bigger
I was running STL-V2 on 3x16340 yesterday - everything was ok at least for 10 minutes - and shall get also a 1x18650 length tube soon... Legoing is nice 
My STL-V2 arrived and I took it out tonight to see how it measures up to my Trustfire TR-1200 (3x 18650). Well I was totally pleased with the output of the TR-1200 until tonight. The Sky Ray STL-V2 (2x 18650) is now my new stallion. It is a very impressive torch. I am very pleased with this purchase. Worth every cent!
Ok, I have given up with 3- mode only driver but I have a problem.
My friend probably fried the driver, are these original drivers available anywhere, strobes are accepted…
Tailcap would also be in need, at least the clicky mechanism.
Hmm, still have not found the source :|
Any advice for the original driver?
I don’t have a source for the original driver but the SST50 driver is a power upgrade but two blinky modes suck.
http://www.dealextreme.com/p/8-4v-sst-50-5-mode-memory-circuit-board-for-flashlights-50025
Thanks for the links!
Any idea of how these will fit in or does host need lathe-work? :)
4A is a bit much on the emitter but I guess these are the only ones available. :|
I just recieved my STL-V2. I wasn’t impressed during the day with it. Comparing it with my X9 it seemed exactly the same only bigger. Taking it out and shining on some trees in the distance, the difference in throw is apparent. The beam goes way farther with about the same spill. Longer runtimes as well. Very happy.
I modded my fandyfire V6 with this driver and it's brighter, 4A is fine. Below are my instructions from an earlier post #136. You can use a belt sander or hand file to cut tube shorter as instructed below. Almost a drop in mod and very easy.
If you use the DX SST driver be sure to mod the tube on the end that changes modes with the old driver. Remove material at the end of the tube so the threads bottom out and tube end does not make contact with driver. Another solution might be an insulator washer. Not heeding this suggestion may result in a direct short. Don't ask me how I know this information. YMMV
the one I gave link to is original one