Instruction: Analyze a question and its supporting document. Predicting answerability based on the information provided in the document. Output yes if the document contains relevant information to answer the question, otherwise output no.

Input:
Question: what battery size does it take?
Document: This flashlight didn't come with batteries and doesn't take normal AA or AAA batteries!Never have I purchased a flashlight anywhere without batteries. Then to find out you can't get the right size without special order, what a scam!
These are extremely useful flashlights, compact in size, well built, weapon's mountable and able to take discharge/recoil impact from high powered rifle discharge [.30-338 Winchester Mag]; however, that is not my intended purpose for the units I purchased. I am using mine for immediate access same/similar extended purpose (time consideration) equipment backpacks from EMT response, "Go" bag and other applications.
I did take them out of an old laptop battery good way to recycle too. Very bright although not looking like 1000 lumens more like 300L.
got flash light, put battery in, and switch worked one time! would like to get a new switch but would have to order a new flash light. not going to take the chance. Should have gotten a stremlight.....
Tough to find a negative if you take into account the price point. I wish it had a momentary on feature (you have to first click it fully on.) But other than that it is very bright and appears to be robust. In comparison to my surefire Backup model this unit is much much brighter. Of course it is about a fifth of the price! I am using mine with the lithium 18650 battery. I tried two cr123 batteries in it and no difference in brightness.
After reading a lot of reviews on a lot of products, I decided to go with the Ultrafire Wf-502b Cree Xm-l T6. I couldn't be happier. At just under 5 1/2 inches long, it's compact & packs a powerful punch. I almost blinded my poor wife when trying to demonstrate it for her. It feels very solid & durable. Looks like it can really take a beating.The only thing that is maybe a con for me is the battery type.
and glad i didn't take that advance. It seems like people were being steered toward limited type (no 18650), yet expensive $60 chargers. If the point of rechargeable batteries is to save money, then how is this meeting that goal?Instead, I took Steven W Vance advice and purchase the way less expensiveSYSMAX Intellicharge i4 JETBeam Nitecore Li-ion / NiMH Battery Charger V.2. It is very flexible and does everything right!
I thought I'd take a chance on this owing to the good reviews. I didn't go wrong. Sucker REALLY puts out! Runs on one 18650 (protected) Li Ion cell. I bought the combo deal that comes with two cells and a Tenergy charger.I have been experimenting with LiIon cells salvaged from old laptop battery packs. Modded a few Sams Club 3 cell AAA flashlights rated at 90 lumens to run on one 18650. Pretty bright actually but my Ultrafire Wf-502b destroys every flashlight I have ever seen.
what  a  bad  to  the bone  flash light !! it  is  super bright  and tough and  even  better  than  i  imagined !! the  only bad thing is the batteries don't last long ,maybe  twenty or thirty minutes  ! just  take  extra batteries and  you will be  happy  ! !
These will make excellant gifts. I do plan on buying more. Shows nice, white circles of light on walls and sides of barns. Seems well made. This is now the flashlight I take with me EVERYWHERE! And, the price was Great!!! !
Answer: yes