Quote Originally Posted by CatFan View Post
You've got it about right. There are only so many fill-ups in a battery, and the more you use it, the faster you use it up. Heavy fishing can kill one in a year.
That has always been my understanding, that any given batt has so many discharge/charge cycles and you will be replacing them. Leaving them connected works good until a storm comes along and a lightning strike takes out the charger. Other than that, charge em when you're done unless the use was so minimal that it isn't necessary. Mine last 3 yrs or so and then I notice that they draw down quicker than usual. WM batts been in my boats for quite some time, but interstates are as good. Just my opinion.