Even a mighty Hummer EV with a 200kWh battery uses a 12-volt battery ... a green "hydrometer eye," or—as a last resort—pulling it out and letting your local parts retailer perform a load test.

Delphi engineers let me test drive a European 2016 Honda Civic diesel they converted to 48-volt power. The trunk contains a compact 48-volt lithium ion battery and a power converter.

In this report, we’re testing Topdon’s new V4500 Plus jump-starter on a 12-volt battery that is beyond dead. The product test actually is a precursor to the formal reintroduction of “Project ...

Testing a new headlight before you install it can save time, money, and frustration. Whether you’re checking a replacement ...

Best Car Battery for 2022 Every battery needs a 12-volt car battery, even that newfangled electric car you're driving around. 12-volt car batteries continue to be the biggest part of the $100 ...

After a rocky start, our long-term 2021 Ford F-150 Limited hybrid test truck had a good run of towing, hauling and being a zippy, 430-horsepower luxury truck that’s accumulated more than 16,000 ...

Here at GM's top-secret Technical Center lies the high-tech bones of the Chevrolet Volt, which is looking more and more like it'll be in dealerships by 2010.