I have now had 2x125Ah Elecsol sealed batteries and a Bosch cranking battery for 6 years and all still going strong. Always on charge via Sterling smart charger while in marina and over winter. Have never touched them
Fireball, sorry for delay on replying.... IIRC these were the folks who supplied the batteries for me - their main market on the 'marine' side is to narrow boats on the canals in the area http://www.cheshirebatteries.co.uk/spec.php . Hope that helps.