I do see that they show it as a wheelchair battery in the link that I posted but it's the exact same battery listed here on the site from Staab (they don't specify) and also the one Bob Roller talked about at the top.
I assumed that since it was listed here in the Important Topics section that it had already been vetted as suitable for our bikes. I was only trying to provide him with another source that might be cheaper or easier to order that same one, not just tell him the cheapest one I could find that would fit. I probably wouldn't have known about/tried that one had I not seen it here.
Not arguing, just making it clear why I posted what I did. I know the limits of my knowledge and hope the Amazon description didn't give anyone the wrong impression.