Cars, trucks, RVs, and motorhomes run dual 12-volt batteries for various reasons. Depending on how you wire a two-battery 12-volt system, the result can be a 12-volt system or a 24-volt system—or even ...

I have been around long enough to remember when most cars were equipped with 6-volt batteries. They were cumbersome and never turned the engine over fast enough in cold weather. Then sometime in the ...

Manufacturers are investing huge sums into battery technology to maximize the range and performance of new electric cars. However, if you pop the hood of a modern EV, you might find a regular old ...