Over the winter my on board charger gave it up. I always top off the batteries with distilled water before winter and leave the charger on all winter (had a Promariner charger that had, would condition , maintain ect...)
After finding that the onboard charger quit, I tried charging the batteries with a portable charger for deep cycle batteries and the full charge light wont come on (I have charged each battery for 3 days on 10 amp charge)
Are the batteries shot?
How do I check to see if they are shot? (they are 3 years old and have been taken care of, always kept topped off and kept on charge)
Thanks in advance for any help.