Wal mart changed their batteries last year. They dropped the hour rating. I went to advanced auto parts and got a group 31 battery and so far love it. Long lined all day a couple times and 87% lowest I run with 12 volt Ipilot which is an amperage hog. If you charge right 5 years is average and as long as you run once a month or better, there is no need to put a charger on the cranking battery.