Instruction: Given a question and the related document, predict if the question is answerable based on the information provided in the document. Output only yes or no.

Input:
Question: how many 18650 batteries does this take, 2 or 3? also, how many watts?
Document: Takes about 30min modifying it and $20 part cost. The result is that it is now significantly brighter than the 9x. And I really like it! When you run it hard, it gets hot very quickly.I also mod the 9x but the 3 batts 26650 simply do not have the "juice" to run 9 LEDs hard at near 3amps.Look 2,000lm is nothing to sneeze at, better many car headlights.
It is the biggest flashlight I ever have, but it is also the brightest flashlight I ever have.It is a little craze, but I do put this flashlight on my bicycle  (To be honest, it was bigger than what I thought before. So I had to used a number of accessories). When I ride bike at night, I can tell you that this flashlight is brighter than many cars' headlights.
This is unacceptable for a light that is advertised as being capable of using either 18650 or 26650 batteries. The same behavior occurred with both of these 8500lumen 7x Cree XM-L T6 lights.I am contacting the manufacturer about this.
I paid for a 8500 lumen flashlight and the seller sent me a 8000 lumen I don't care so much about that the light is very bright and u can use 26650 batterys and the 18650 I would suggest getting 1 more 26650 x 3 and I don't like when its on high it heats up and shuts off I have one from same company its a 3800 lumens does same thing I just wish  u could use it more than 10 min. or so on high
If you studied physics before, you should know that the voltage is one of the key elements about the output powers. Three-3.7v-batteries means there are voltage of 11.1v on this flashlight. The batteries on cars has 12v. In the same time, The LED light is more efficient than both halogen light and xenon light.
the lit spot would be so bright it would be like staring at the sun. It should be ridiculous. But it is not.So at best this is like a Maglight alternative. It's just as big, and about the same brightness. Actually worse. It also makes my batteries very very hot, as if shorting them out. And the batteries rattle, as if loose, inside the flashlight.So summary: NOT 8500 Lumens. Burns batteries. NOT worth $85. I want a refund.
This arrived today - my second. I have been using the first light with two 26650 batteries, but I had tried it with the extension tube and three of the 26650 batteries. It throws a lot of light, but I did not measure how bright, only a subjective view.The problem is that 18650 batteries - either two or three - will cause the light to work for one second (or less) on three of the settings, bright, strobe, SOS. Then it stops.
... and yes, it's almost be enough to make the sun jealous, if only in a rather smaller space nearby. Fairly broad field of illumination, and reaching out and shining someone the next block away is no problem. Using 3 26650 batteries, this puppy could make a Jedi faint. That being said, it sucks down the amps and will drain the batteries noticeably fairly quick. But then, we are talking about enough juice to ignite stuff if one is not careful!
Very nice looking torchlight with plenty of power. But only time will til how good it really is ,so far its great. I use it in the woods in back of the house and I can see everything quoit clearly , the bright light also works great for quieting coyotes ,I turn it on shine it in the woods and the howling stops.
One needs to put something conductive on the tips of two of the cells so they make contact from to back. (I used aluminum tape) This flashlight is not at fault as it has spring loaded contacts front and back. Using 18650's there is no problem because many have a nice tip like on a AA cell. Still, not as bright as the 26650's made it. Hmmm...I do have to hand it to the company though.
Answer: yes