I've been singing the praises of the Westco AGM battery for years, first on the old list, and a few times on this forum. I installed one in the 750 in the spring of 2001. It started showing signs of being noticeably weaker a couple of weeks ago, cranking the engine over slower. I checked the charging system then, but it was fine. The battery has been gradually crapping out for the last 2 weeks, so I took it out of service today as it wouldn't crank the engine this morning. So it lasted about 7 years, not too bad. Another one is on the way at $59.95. I have 6 year old Westco batteries in two other bikes that are still going strong.