2008 gem. My q powers up at plug in and does it’s self check. Seems to run through the voltage meter while charging. But no 80% or 100% lights ever come on. It was working fine to my knowledge but I came home to a sulfur smell the other day and realized it had not shut off and my batteries were hot. Unplugged it And ran a fan to cool them. Ran the car the next day and it ran fine. Dropped the batts to turtle in order to recharge. Not sure if they sustained any permanent damage. Any ideas?