I have broken my own personal record as far as battery life. It on,y lasted 1 1/2 year. I use it less than before and it froze and swelled a bit, probably cause of to much sitting around in -20C. I took it in to get my starter tested and first thing mechanic checked was the battery, of course. BUT, I haven't given up the idea of getting the starter tested cause I suspect it's drawing to much power at startup.