Hi, this is my first post in the BLF, hope I can learn a lot here.
I bought a Ultrafire C8 Xm-l from an HK ebay seller. The light was working fine but now the led just 'barely light up', I mean, it doesnt even iluminate, just stays white.
What do you guys think? Has the driver been damaged? Or the led?
Sorry for my bad english, it´s not my native language.
Hi Gab.
What brand and type of battery are you using and is it fully charged?
Hi!
I was using Trustfire protected flames. Fully charged. I received them from Dino Direct and they performed very well on my SkyRay Stl-v2.
I tried also some crappy Ultrafires that came with the charger (DX) and the flashlight performed the same way (the led just stays white).
check that the pill is not loose
+1 and the same for the tail switch. (But my bet, like EDC's, is that the pill needs tightening.)
It almost sounds like the reflector is shorting on the emitter. Try unscrewing the head and removing the reflector and turning it on and see what happens.
I just tried tightening the pill, no luck.
The tail switch is tight too.
Any other ideas?
While tightening the pill, all the tests where done without the reflector.
Perhaps driver has poor contact with brass ring on pill. I've seen some with really small solder joints that were barely holding themselves.
Maybe driver is faulty, which is no great loss as they are in 99.9% pure junk with really low 100-200 Hz PWM which on low modes with small duty cycle leads to unbearable flickering (at least to me)
In a last few days I rebuilt several C8 flashlights and all of them had more or less same issues.
This is what I change/modify:
1. New driver (8x7135 based)
2. New wires from driver to led (awg24 with silicon insulation)
3. Tightening the pill all the way down (add some thermal paste)
4. Fix rattling front glass with thicker o-ring or in some cases if reflector cannot reach led star,add aluminum plate under led.
5. Change all o-rings and add some as there is usually place for two but only one is installed originally.
6. Modify tail switch spring or replace, cut or sand down retainer ring to avoid over tightening and crushing longer protected batteries.
7. Clean an lubricate all threads
If done carefully and patiently C8 can become very nice and reliable flashlight.
You can try testing the emitter with 2 jumper wires off of a lion battery, running it for a short time wont hurt it.
Done that and the Led (emitter) is working! I think that leaves me with a faulty driver. From which site can I get a good one? It´s a pity because the original one was working flawlessly until this happened.
The ones from KD are pretty good.
Hi ! first of all i want to apology for my bad english.
I had bought 2 ultrafire c8 xml-t6 about 1 year ago , everithing ok , very good flashlights (from an ebay seller (hkequipment) for about 20€ each one).
Recently i bought another 2 c8 xml-t6 flashlights from another ebay seller (loweproshop) for about 11 € each one) and i want to tell you they are very bad (not the same components) , first of all the clicky switch broke (on both flashlights) after that the led emitter broke to and this where my problems begin.
Now i have replaced the led emitter (twice) , it was working fine (not as bright as new). i have made a mistake and i have connected 2x18650 UltraFire 3.7V 3000mAh and now the led lights up but is not bright at all (barely see the light, like a normal led).
Where i can buy a good quality driver (for ultrafire c8) and a bright led emitter?
How can i test the led emitter ? i could connect it directly to the ultrafire 18650 3.7v 3000mah battery but i am afraid not to fry it.
it’s a shame because the housing is quite nice
Waiting for your advice. thank you very much!
Hi can you please respond to my post?
thank you!
:bigsmile:
Great people
sometimes language problem
but when they understand they take care of business.
Great people
Love to take them to dinner in HK