i have group 27 batteries [interstate] for 24 volt trolling motor min kota fortrex 80lb in a z8 nitro. batteries was dead in apr 4 hours pulling cranks maybe less. how long would group 30 batteries last or what do you think the difference would be? what brand of battery? i read the stickys but couldnt find my answer. also have group 24 for a starting battery [250 pro] and if i run the recirc pumps very long ill be jump starting motor do you think starter battery needs to be group 30 also? thanks in advance. joe