For idling voltage, the battery should maintain a steady draw at 14-14.5 volts (under 14 volts implies a weak battery or a failing alternator). You can also use a multimeter to test the alternator. In ...

There's a mysterious set of codes on the battery in your car -- and the one you may want to buy to replace it. Here's how to ...

One of the most important and objective tests we conduct is a standardized battery test. We're proud of our battery test, which we've developed to simulate a typical daily usage pattern for most ...

It is also an option to determine if the battery can perform as manufactured instead of running a performance test. For the Ni-Cd, the only major test that is required is the performance test. In ...

The discharge subscore rates the speed of a battery’s discharge during a test, which is independent of the battery’s capacity. It is the ratio of a battery’s capacity divided by its autonomy. A ...

Most parts stores will test a battery for free to tell you if you need one. If all of the above checks out, another possibility is that the alternator, which generates the power that recharges the ...

A multimeter – sometimes called a test meter – is a handy tool ... When you drive, the car’s alternator will charge the battery, keeping it topped up. But the starter motor is one of the ...

We aim to give you a view into how each laptop could actually fit into your life and workflow, and the pros and cons of their various features like performance, display, and battery life.

How cold is too cold to drive an electric car? Here's a rundown of how to make your EV more efficient to adapt to winter conditions.