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: Is the battery 4400mAh or 8800mAh?
Document: I have had (and have) many lighting systems as I do most of my riding in the early morning. I have used lighting systems the have cost 10X and even though the more expensive products have been better made and have a nice light distribution, this light is great for the price as a back-up. Not sure of the battery life yet but so far I am happy with it and it has met my expectations.
Works really great as a bar light on my mountain bike for single track night riding or just riding around at night...
This light is great, nice and bright. Its the wiring that prompts the 2 stars. its flimsy and broke/split at the base of the light while mounting it. I was being gentle with it I cant even imagine taking it down a mountain bike trail. I cannot return it because I didn't try to use it until after the return window had expired. So unless you like rewiring and soldering find something a little more rugged. I mean really the wires split intwo just by trying to mount it.Jeffg
My second purchase and very happy. Good light for night mountain biking in the northeast. Can not justify the over prices lights in my shop. These work at least as well and the batteries hold up better.
Its really bright, it lasts long enough for 2 of my 45 minute commutes, but I've had the charger die. A new charger was really cheap, so its worth it.
It's a little bit cheesy in construction but good value for the price. I've heard others have had problems with theirs but so far so good with mine.
It work fine and happy that I bought it. It is so bright you  don't look in the beam  hurt you eyes.
I bought this light for mountain biking. It works better than most mountain bike specific lights you would by from a bike shop at 1/5 the price. At 1200 lumens and a wide angle adapter you will light up that trail like never before.
I bought this light based off of other reviews and the fact that it is rechargeable and with lithium batteries. The product works great but they failed to sendany instructions or paperwork with it. I still don't know the best way to mount the light to the head strap but that is not why I bought it. Still would be nice to know though. Very powerful light with three settings, super bright, very bright and emergency fast flashing.
Answer: no