I can get new AGM (higher-spec) batteries rated at 19AH (for $85 + shipping), the stock Yuasa is 16.5AH, which I can get as well for US$115 as of Jan. 2012. Check with me direct e-mail for pricing; Todd at GuzziTech.com
Also, I am now a dealer for the all-new lightweight Lithium prismatic cell batteries. See this thread; http://forum.guzzitech.com/forum/160/7987.html

