Review on Yuasa YUAM2648A Lead_Acid_Battery by Ralph Banks

I bought one, filled it with acid and charged it. Used on my '81 Honda CT110 during the winter during a refurbishment. Kept it on the maintainer off and on with no problems. I removed it two weeks ago and returned to a completely dead battery that won't charge. I have tried two different chargers and this battery shows no signs of working. I have used this brand many times and have had no such problems. Couldn't figure out how to make a refund or complaint through Revain. I don't know where to go from here.