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: where do i buy the battery
Document: well i have many ultra fire flashlights and this one was a gift to my girlfriends father and its very nice just make sure you buy the battery with the light. Her father loves it he uses it all the time its really bright he says and if he's happy with it needs to be perfect. i definitely recommend this as a gift!
I'll buy another one.
Brighter than I expected. More durable as well. This thing can take it's share of abuse. Great buy, I recommend this item.
It's crazy bright and the rechargeable batteries save you tons. My friend who bought a similar light for $120 seems a little brighter even with lower rated lumens, but definitely not worth the cost difference. I'd rather buy 10 of these!
The Ultrafire 1000 is a small light with a very bright white light. It fits handily in the our vehicle and beside the bed for use in the middle of the night. One can not look into the light without suffering the painful conquences. This makes it handy as one of the home security systems. A great buy!
Battery needed for this unit is hard to find, pricey, etc. Rechargable only, wasn't well-described in the presentation. Does work with C123's, though
Great light that will outlast, last! and uses (1) 3000 - 4000mAh 3.7v rechargeable 18650 battery (battery is not included)
great deal on a great little lite. very bright and seems to have great battery life as well. seems as nice as the other guys for alot less
For the price you can't beat it. The only downside I've experienced so far is that the battery doesn't last very long. I picked up the charger with 2 batteries though so it's not to big of a deal.
Granted, one only is good, easy to carry etc... but it is also non-standard yet. I have never seen this type of battery outside of the USA. The power of the light indeed comes from the 3000mAh of the battery.
Answer: yes