I don't use this 2007 Miles too much and I last charged it a few days ago and today after about 5 miles out I get a funny smell inside the car, I guess kind of like acid. Also remember hearing one or two popping sounds I thought came from driving over a pebble but could be a battery exploding? Anyway, after about 10 miles I'm almost home but the car can't make it up a steep 1000 foot long section on my street. I just left it there for tonight. The voltage in the display read 69 volts, and when I went back to try again it was 73 volts but still wouldn't go. Just moves and foot and thats it. Are the batteries fried even when it shows 73 volts? How do I test them? Do I have to disconnect them from each other to test? I have an electronic car battery tester will that work? What CCA setting should I test? Thanks for any ideas.