So I was starting to notice last year that is was taking longer and longer for my glo-plug indicator to go off...and I know it wasnt from weather...Well now I've had my truck sitting inside (I live in the SALT belt, wait i mean snow belt) for a couple months...My batteries are dead....I've started up 4 times but they have just died....ANYWAYS...my question is what are the best batteries to get? thinking Optima's....