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 ...

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 ...

With fuel economy regulations tightening and connectivity and autonomous-driving capability proliferating, the old-fashioned 12 ... volt power. The trunk contains a compact 48-volt lithium ion ...