But does an AGM battery outlast a regular lead acid battery in an ATV? The Polaris is completely dead after four years even on at maintainer and it is a royal pain to replace that battery in the old Sportsman 400. Even on year three I couldn’t trust it and carried a Noco GB40 jump starting booster. The Kawasaki battery is under the seat where it should be and is a five minute change. Not so that Polaris.
Has for me - 2009 Polaris Sportsman, OEM battery 5 yrs, replacement AGM 9 yrs and counting.
Also had a 2004 Sportsman until fall of 2020 - 3 batteries: 1st two Polaris sourced lead acid, 3 to 5 yrs each. 3rd batt AGM, still going strong when I traded in the machine.
