Well, YTX7A-BS is actually the size and capacity of the battery you are looking at based on the Yuasa coding system. Yuasa's method of naming batteries has become essentially de-facto in the power sports industry since they are the OE battery found in most Japanese bikes and many american products as well, and all the other batter manufactures just copied it. Have you looked at any brands of batteries in that size yet? This is where the difference lies.
A few things you'll want to pay attention to:
Cheap "Gel" Batteries: Most of the time if the battery is inexpensive, and marketed as "Gel", it's not actually a Gel battery so much as it's a maintenance free AGM battery. AGM stands for "absorbed glass mat", and instead of a liquid or a gel holding the acid to the plates inside the cells, the acid is held by a fiberglass mat. There's nothing wrong with these (on the contrary, a good quality AGM battery is indeed a very good thing and what I would recommend), but it is misleading marketing. True Gel batteries tend to be fairly spendy, be wary of cheap gel.
If you are in the upper level market for a battery, and you want traditional Lead Acid, just buy a Yuasa. You'll pay for it, but they are great batteries. Can't go wrong with a Yuasa.
I would recommended that you get comfortable with a couple of brands of batteries that have a proven track record.
Also, not all Chinese batteries are created equal, and this holds truer than some other good/bad Chinese built parts. I source my Universal Parts brand batteries from a very particular factory in China, and they take their quality
very seriously. So much so that we stopped carrying a different "uplevel" brand of battery due to the fact that our batteries we experiencing substantially lower failure than the supposedly better batteries. They do cost a bit more than the most affordable of Chinese batteries however.
I also visited some pretty scary factories however, and sad to say there are some pretty terrible quality cheap batteries on the market right now too.
Matt
Thanks for bringing up that info about the Gel cheap batteries, The Gel Battery was a 'YTX7A-BS' BUT LIKE i said after reading the info u mention I went and did some more research and the 12V I was looking at was Only $30, after seeing the other prices in google of some I understood it was a gamble.
SO I got the one Below. Decent price, great reviews all over Amazon about scooters etc, so Hopefully I made a Good Choice.
YTX7A-BS High Performance Power Sports Battery