Hi. We had two of these batteries installed in April 2017. Have run the boat the last two years for around 12 weeks each year.
Returned to the boat this year having left the boat not attached to electric over winter but batteries turned off.
Recharged through standing electric points and both service batteries got hot. Today again plugged in to shore power a lot of heat generated and one if the batteries had buckled at top.
Please advise. Lloyd