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: do you need to insert a double/tripple A battery or does it work without battery's?
Document: Works all the time. I need this on almost every electrical work I do with my vehicles. Good price too and the quality is also good.
Very sturdy device which makes it very easy to test circuits without removing fuses. Two thumbs up! I've used it to hardwire my black box on the car. Wouldn't be able to get by without it!
the test light works good, it is nice to have around when you need to test for 12 volt current.
like they said, heavy duty testing lamp, im very happy with it, did his work and well, i can recomend it
This is not a product that I will use often, but when I need one, they are very handy. this appears to be a good unit.
See all the great reviews for this product. That's because its a great product. Very happy with what I have received and promptly put it to work.
This test light is constructed well and is of good quality. The cord is long enough to work in most situations and is of good quality. I recommend this tester.
auto technician grade tool, nice product, heavy duty, works great. I bought 2 of them 1 for home and 1 for the tool box at work.
THE TEST LIGHT WAS GREAT WITH NO PROBLEMS WAS AT A GREAT PRICE TOO WOULD TELL OTHERS TOO OF THIS AS WELL
I expected a small tester like the one I currently had. This is a big beefy unit with an extremely heavy duty cord. A little large for my liking, but built so well, I'll keep it....
Answer: no