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 ...

Rivian has yet another 12-volt battery issue, this time on the Gen 2 R1S and R1T vehicles. Owners report that an aluminum bracket holding the battery in place corrodes after only a few months, ...

Every car needs a battery to help it start and power its electronics. Here's how many volts this all-important component actually generates.

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 ...

Is your car battery more than 3 years old? It could be on the verge of dying, and you might not even realize it. Keep a closer eye on how much life it has left by purchasing one of the many car ...

The old-fashioned 12-volt lead acid battery hasn't changed much since the mid-1950s. Now it's getting a makeover to handle a host of new responsibilities in electrified, automated and software-defined ...

Ford's Mustang Mach-E EV is pretty damned impressive for a first effort at a built-to-purpose electric vehicle. Of course, no new model is without its faults, and the owners of some early Mach-E ...

Unlike many units, this battery charger continuously charges at maximum current, tapering off only near full battery voltage. In this unit, the full load current of the supply transformer/rectifier ...

Yes, Virginia, even a mighty Hummer EV with a 200kWh battery uses a 12-volt battery that could leave you stranded, but Clarios has a fix for this. It seems ridiculous, but even electric vehicles, plug ...

Outsiders might not know that electric cars still have lowly 12-volt (usual lead-acid) batteries on board to power the vehicle's 12-volt systems, but they do and Musk wants that to change with the ...

With fuel economy regulations tightening and connectivity and autonomous-driving capability proliferating, the old-fashioned 12-volt automobile electrical system has reached the end of the road.