Most likely the power elements: the coil and mosfets: i`ve examined only 1 of those failed drivers actualy cause its hella time consuming and those elements were fried, prolly due to the heat caused
cooling this driver is a must btw, it heats alot, those lovely sillicone cubes will help
Also using a 1206 as a mod R would be good too, the resistor also generates lotsa heat so a bigger one is actualy a good idea
Efest Purple 4200 with a bypassed front spring ofc, on some of those torches the centering ring needs to be tuned too( usualy sanded a bit, but only an idea)
I dont have a reliable Liitokala source anymore….EU regulations… i have a feeling they will ban flashlights sooner or later
I was about to buy it because of the 33 USD deal, but then I read a few reviews and I really don’t like the fact the the led is underdriven. Actually I was looking for thrower bigger than my C8 (not huge like the convoy L6, still easy to carry), without spending too much, but I don’t think this UT02 will significally outperform my C8 with XP-L HI and FET+7135 driver… so what’s the point in carrying a bulkier flashlight?
I mean, the host looks awesome, but considering the 12V Led and the electronic switch, I don’t think it’s easy to swap just the driver (I wouldn’t care losing the charging if the led is driver at its full potential). The people who had the failed driver, what have you used to replace it?
Of course modding the original driver is always an option, but this particular light seems to have an easy failing driver even in stock, like stated in the posts above…
I a bit confused :s what would you suggest? Also the deal is ending very soon…
Ok, so I don’t have any strap wrenches, so I improvised….!
I tied some pieces of paracord to two screw drivers and wrapped two pieces of thin rubber around the body and head of the light. Then I wrapped the paracord in opposite directions several times until tight and used the screwdrivers as leverage. Same principle as using strap wrenches.
No heat required, just brute force :sunglasses:
In case anyone is curious, this light will work with a 3xAAA battery adapter as a power source. Out of curiosity, I tried it with some fresh AAA Eneloops. Turbo mode didn’t work but on High it was getting in the range of 400-500 lumens. The battery indicator was red in this mode due to the voltage. Not too shabby although I’m sure the runtime would not be good on High. I was considering gifting one with a NiMH option to someone who didn’t own lithium batteries.