Instruction: Output yes if the supporting document can answer the given question. Otherwise, output no.

Input:
Question: What kind of batteries do these lights use? AAA? If someone who owns this product could let me know what batteries these lights use, I would appreciate it. I like the idea of these, but would like to know whether I am going to have to shell out extra cash for batteries I wouldn't use for any other device... Thank you!
Document: Excellent little lights. Perfect for road bikes or simply being seen on any bike. I would not use them for night riding, but as a warning light for the daytime or as the sun is going down, they're perfect. I bought a 2nd pair upon recieving them.Nice Product
These lights are a good price and okay for being seen, but not great for seeing. Disc type batteries don't last that long and are more costly than typical AAA or AA batteries. These lights are small which make them convenient and they fit in lots of places. They'd be better if I could more securely fasten them to the tool bag that hangs from my saddle.
I bought this item for my ezip scooter which I added a wire basket on top of the back wheel. No place to attach the back light except on the wire basket and I had to use a plastic tie to secure it. Fits well and small but with enough light to let motorist know where you are especially if one uses the blinking option.
These lights were exactly what I was looking for. They may not be bright enough to guide you through a dark alley, but they are bright enough to let cars know you're there so that they don't bulldoze you. The velcro straps let you mount these anywhere you please. I haven't tested them on a dark road, but in a dark hallway they light it up pretty well.
These are great replacements for my bulky AA and AAA lights that have died out or fallen off. Because they are so small, I don't worry about them being stolen, I just leave them attached all the time so they're handy when I need them at night. Because they are led, the batteries last a long time. These lights are well designed and well made.
So this product was really cool when I first received it. It comes with the two lights straps and also a little instruction paper that we men don't need cuz we can figure it out on our own, you can do it guys. Then second of all the only thing I didn't like us that I have been using the product for about 2 to 3 months an my front light battery us runnin out ao now I have to go and buy it ao just be aware of that.
However, they are so easy to remove that there is no reason you shouldn't just take them with you instead. The straps also allow you to attach the lights anywhere - handlebars, seat post, helmet, bags, etc... Overall a solid set of lights to increase visibility of you at night.I haven't tried to replace the batteries yet. I've been using these 3-5x a week for the past month and they are still going strong.
I bought these lights as warning signal when I bike in the evening. They are small and lightweight and work well. The Velcro straps make it easy to attach to a bike.Later I found that there are many choices for bike LED safety Flashing Lights on Ebay, and bought one from eBay for $1.90, including shipping. It uses AAA batteries and is bigger.
These attach with Velcro straps which I initially thought was a good idea, so I could remove them easily when I lock my bike. Unfortunately, the front lrear fell off after the first time I rode with it.
I wanted to like these lights, as they're easy to install and operate, and they're small and look nice, but after using them for a few months, they just didn't cut it. Barely any light output, and it diminishes fast. I would never buy these again, nor would I recommend them to anyone.
Answer: no