Good question asked. I’m also wondering the same thing. Most likely a rejected design light from a reputable flashlight manufacturer which doesn’t want to be named? Feel like placing my bet on one… 
No picture
Please add a link to the flashlight
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If you go to tinypic.com or another image hosted you can upload that jpg for us to see or link to the light on Gearbest please 
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Apparently it’s a fake emitter with blue tint and only makes around 500 lumens.
Also
https://www.reddit.com/r/flashlight/comments/5u2yif/zero_reviews_usb_rechargeable_flashlight_18650/
I knew it’d likely be a fake XML, but I’m disappointed that it’ll have a blue tint (I’m assuming the color temp is 6500-7000k) 
Where can I buy genuine Cree Emitters for cheap?
Nevermind, found some on eBay. I’ll post screencaps of the listings and, if you could, tell be if they’re genuine.
All the eBay listings have the chips at 6000-7000k. Where could I get 4000k-5000k chips?
Got this
Tossed the cell
The ramping is nice
Charging should be good
Not sure if I’m going to swap LED
If I sell a light I think I put this in the box as little present.
According to the description it doesn’t come with a cell. Does it?
Oh IDK
Mine came in a plastic padded box (nice) with an Ultrafire cell.
Trust me, you dont want to use that cell, it’s crap very low capacity
Whether it comes with a cell likely depends on your location.
For example shipping a li-ion cell to USA is problematic and won’t be included.
I would be wearly of leds from ebay and you dont want those random bin tints.
Here is a list of places to get a better led
I already have a cell on hand, I’ll likely use that, but I may get a new one. Still thinking about that,
Well, eventually I’ll replace the LED with a chip that has a lower Kelvin rating. What does reflow mean? (Sorry, I’m an amateur at this stuff)
I see you edited. Thanks for the link
What’s the difference between the 5A and 4C tints?
The led has to be mounted to a MCPCB commonly called a star.
You can but the led already mounted to a star (some name brands are sinkpad and noctigon)
or you can buy the bare led, and remove the old one from the star that comes in the light, then put the new led onto that star. This process is called reflowing: led is soldered to the star and to remove/replace it you put it onto a hotplate to reflow the solder.
Easiest way to get a new led is to buy it on a star. You just need to know the diameter of the star that comes in the light so you can replace it with the correct size.
Then it is just a matter of unsoldering/resoldering 2 wires, as opposed to reflowing the whole led.
Wish I had a better answer but I will refer you to this chart.
Cree actually explains it in articulate detail but I can’t make heads or tails of it. 
http://www.cree.com/led-components/media/documents/XLampXMBL.pdf
So would 5A have a more reddish tint?
4C is a bit warm, but nice, not too yellowish. 5A is a little warmer, closer to halogen/incandescent.
I’m probably gonna buy this:
~~lck-led.com - Informationen zum Thema lck led.
https://www.fasttech.com/products/1609/10003889/1425002-cree-xm-l2-t6-3b-10w-1100lm-5000-5200k-neutral
Is 20mm the standard PCB size for most flashlights?
It’s a shame that the emitters on all these generic lights are garbage. I’d pay a few $ more to get one of them with a good neutral-white OEM so I don’t have to swap myself. I happen to like the design of a lot of the generic hosts, although I tend to dislike the UIs with the forced strobe modes.