Instruction: Evaluate the answerability of a question by analyzing the related document, outputting yes if the document contains information addressing the question, and no otherwise.

Input:
Question: Is this single battery flashlight or double?
Document: Keep expectations reasonable.See if the rechargeable battery setup is what you want to use -- these are not AA or AAA available everywhere type of battery. But, you get much higher output from a single battery. This is a good way to find out if you prefer this setup or want to stick with throwaway alkalines.Not sure if it really produces 1000 lumens, but suffice to say to throws a very bright light.I've had it a couple months and it has worked well thus far.
Great light, but CHEAP construction on the charger. I previously purchased another flashlight with the two battery charger which is MUCH more solidly built. If this charger was built tot he same standard this would have been 5 stars easy.
I have several versions of this flashlight. Every one of them is a good product except for this one. For some reason after putting in the battery the contacts are a little finicky. Too right or too loose and the flashlight won't work. And the &#34;sweet spot&#34; tends to move.
I have to say that this is the BEST flashlight I have ever owned. It is small enough for me to carry it around the house (it follows me everywhere) yet it is one STURDY flashlight. The battery is just like my E-Cig batteries so I can swap them out if needed. These are so awesome I am getting ready to buy 2 more!Thank you Meco for making these !! !
This flashlight is by far the best I've ever owned. It's almost as bright as some spotlights. People stop and ask me where I got it and how much it costs every time. And they're surprised to hear me say it was $15. The biggest drawback to the light is its non-standard battery, but the battery is great for  using for long periods of time. I already have two of these lights and may have more in the future.
There is no &#34;zoom-able&#34; capability in the lens, it's fixed. I was hoping to have the ability to focus the light from a flood to a spot, like my Mag-lite, but it definitely doesn't support that. I'm not sorry I bought the light, it's a pretty impressive flashlight for the money, but there was another light with an orange front rim that's cheaper and claims zoomable lens support, same lumen and same battery type.
after i got it and charged the battery, works great and battery lasted quite a while.love the strobe, not so much the &#34;SOS&#34;
The light works very well, but the battery does not hold a charge for over two hours of use. I had to get a spare so when the first battery stops, I change the dead battery.
Happy with the brightness and with the battery life. One complaint is that the glass covering the bulb rattled because it was loose. I solved this by placing a portion of a rubber band behind the lens.
Shipping took several weeks --- I guess it came on a boat from China. But the unit is way cool mounted on the end of my shotgun. Very bright and I like the rechargeable battery.
Answer: yes