I have a restored 1947 Plymouth Business Coupe. That was the same year I, too, came off the “assembly line.” The Plymouth has a 6-volt battery, and the starter motor turns over slowly. Can I safely ...

All of the above, Jerry. The problem is that everything in your car is designed to run on 6 volts. Running 8 volts through 6-volt components will put some stress on them and might shorten their lives ...

It seems ridiculous, but even electric vehicles, plug-in hybrids, and hybrids that carry big powerful high-voltage batteries also require a 12-volt battery. And certain usage patterns can end up ...

Q: I have a restored 1947 Plymouth Business Coupe. That was the same year I, too, came off the “assembly line.” The Plymouth has a 6-volt battery, and the starter motor turns over slowly. Can I safely ...