I have a Guest pro charger 2611A, It charges 2- 12V batteries hooked up together for my MinnKota trolling motor. 24 system. It is 1 year old. The batteries 1 year old as well. I noticed that this year, one of my batteries is getting hot while charging and the other not. .Also, I just noticed that there is a little water bubbling out of he top. The hot battery also will not charge and smells funny when charging. Is the hot smelly battery needing replaced?. Or is it a charger problem. ?It is definitely above my head. I use the minnkota little meter checker on the batteries, and it says full charge on the non smelling battery,and no charge on the stinky hot battery. The smell is coming from the hot, non charging battery. Anyone heard of this before and have any troubleshooting ideas for me.? Thanks for any advice.