This is a long thread. I've been reading it like 30 pages. It seems to me that there are 2 major vapor flash clones.
1. Kangxin(#1660 on 3fvape)
-yellow box cover, adjustable brass 510 connector, usb port higher than the authentics
-shows KX-40D when reboot or after long sleep
2. Sunlay(#2806 on 3fvape)
-Black box cover, Fixed Stainless Steel 510 connector, usb port lower than the kangxin
-show nothing
I got my Sunlay version 2 weeks from now, I would try to summerize all info that I can get so far.
510 Connector:
A lot of people are so much concerned that both of them don't come with a spring loaded connectors. The reason I can come up with is all about conectivity. As a lot of people had noticed, the TC thing is in fact a measure of resistence change during use. Further, a 0.01 variation in resistance would means more than ten(s) of degree in F. Thus, a poor spring loaded connector will be a hazard to the calculation. While a well-built spring loaded connector must cost a lot more in the scale of manufacturing. The clone manufacturer are not building their own brand, they just want to make the most out of the product.
As comparing the adjustable connector and the fixed connector. Some had reviewed that the adjustable one especially in brass tends to wear off and rotate easily when you screw in your atties. I had the same experience with the cloupor mini which is a pain in the...
Since I had the #2806 which is a fixed connector. I always found a gap between my mod and the atties, some larger and some smaller. This I think is the design. The engineer of the product aren't meant to shorter thread well. That is to make sure the positve pole will always connect. I had been using Lemo, Subtank mini, Dark horse, Vertex, Veritas, Derringer and Magma on it without problem.
Appearence
I would think that the #2806 looks a lot more like the authentic one. Especially the position of usb port. And it seems to me that the overall finish looks better to me.
Board performance
Actually, I was trying to get a clue, from this thread, which clone perform better. Then it seems no one are silly enough to buy them both for comparison. Though, I heard that the Kangxin #1660 version had updated their firmware with nice little improvement.
1. pre-heat, so it will pust up a little more when the coil is cool so that it will reach your desired tempeature faster.
2. Faster firing after deep sleep. I was told the first version will show the welcome screen after long sleep, but the latest one will fire right after you press fire.
3. The "temperture protected" are not shown, instead, the wattage will go down until tempearture falls below your requested temperature.
Heat-up duration
I really had no idea as it got to be a direct comparison. My #2806 is working fine for me, but I saw some others using Kangxin heat up faster.
I also bought a Vapor Shark rDNA 40 clone, which show the logo 'Evolv DNA 40' after deep sleep, and it is really slow on heat up.
Features
It seems to me that the Kangxin #1660 work closer to the authentic as some button push combination is missing on my #2860. You might compare the instructions to see which of them are missing and how important they are to you.
I don't know whether my summary are at all correct, but hope this will help those want ot choose their VF.
