I've had good luck with a MotoBatt brand battery, AGM, 18mo replacement warranty, available on Ebay, MBTX16U, same size as the old Honda, but 16ah. Had one go bad, after I left the ign on for 3 days, emailed em, sent in the required paperwork, and a thin plastic lid off the battery, and in less than a week, I had a new one to put in. Just another choice. Bob!