[Rich]

I would get this fixed ASAP. I had a battery explode in a '73 911 due to an overcharging alternator...it was not something I would ever like to experience again.

Fortunately, when it blew, I was on my way to trade the car in and the dealer said, "No problem, we'll just hose it out". Even more fortunately, '73 911's have two small 12 volt batteries and I was able to make it on one battery. I spoke to the current owner of the car a couple weeks ago and he said he can still smell battery acid (5 years later).