seems like they dont last at all anymore. i have two on board. 4 years old and the second one is now dead
i am nowLead acid batteries "keep" the longest when kept fully charged. Do you use a battery tender or similar while you are not using the boat?
I hear ya there. Just for yugos and grins I popped the tops off of all 3 of mine about 6 months ago (boat was only about a year and a half old at the time) to find all 3 of them needed to be topped off with distilled water. One of them I could ALMOST see the top of the lead sticking out about the acid. Either they came that way or the water evaporates faster then I imagined. I figured with the specific gravity of sulfuric acid it would make evaporation relatively slow but evidently NOT.lead acid batteries need monthly servicing to get the most out of them. i just replaced my cranking battery. it was 8 years old.