Well the Odyssey battery that I bought back in August '01 looks like it's trying to give up it's job. I bought the battery originally for the R65, installed it in 08/01. In 2002, I bought an '02 R1150R, it's impossible to check the fluid level and service it on the 1150R without removing the fuel tank and oil coolers, so I removed the OEM BMW battery from the 1150R and installed it in the R65 and then installed the Odyssey in the 1150R . Fast forward to about two weeks ago, the 1150R starts acting 'odd' rough idle . So I know I have an emissions test due on the 1150R in August, so I change the spark plugs because they are the originals, and the bike is just short of 25,000 miles, doesn't help the rough idle, next I know the air filter has at least 18,000 miles on it, so I change it, no difference in running. I bought another Odyssey battery for the R65 about 20 months ago, so I decided that I should swap out the batteries , and put the 'fresh' battery in the 1150R. Well after replacing the battery, all of my engine roughness went away, and the speed of starter rotation is noticeably faster. So it looks like 6 Phoenix summers are about all these AGM type batteries are good for. It beats the 18 months the OEM BMW batteries are only good for. Looks like I need to get another Odyssey battery for the R65 in the next few weeks.