# How To Test A Car Battery With A Multimeter

### Any reading of voltage below 9.5 volts, or if the battery holds a good record for a while and steadily drops, or even when it falls instantly to 0 volts, then it means there is a problem, and the battery should be replaced due to its low capacity.

How to test a car battery with a multimeter. Dc power is usually denoted by a v with a solid and dashed line above it. When the probes touch the terminals while the car is off and the battery is resting, the multimeter display should show a reading of 12.2 to 12.6 volts (full charge). As i shown in below images test batter with multimeter.

It's a good idea to write down the reading. The testing and setting method of both meters are same, first of all set your meter on dc v testing and then connect the black lead to batter negative terminal and red lead to the positive terminal of battery. With the headlights on, at 80°f, there should be a voltage drop of at least 11.8 volts (25% charged), and ideally 12.5 volts, between the positive and negative terminals.

Let the meter black probe make contact with the battery negative terminal. When you are testing a car battery, you want to test dc power. Our car battery overview page is a great resource as well as our common signs of a bad car battery post.

Then, compare it to the voltage figures below. Sometimes, a battery may have enough power to start your engine, but the electrical system can’t support the increased load of operating other electrical things like your headlights or radio. If you don’t know how to use a multimeter to test a car battery, read the procedure below:

Car battery hydrometer test it is the quickest and easiest way to examine the state of charge as well as the battery’s health, thereby know whether or not the battery needs replacement. Test a car battery using a multimeter by putting load load is applied to the battery while its voltage is monitored. Change the function to ohms and touch the leads together.

When the leads are separated, the reading should be 1. Set multimeter ensure the ignition, lights and radio are off. Turn on your multimeter and touch the black probe on the negative terminal of the car battery and the red probe at the battery cover.

### Proper use of the typical Digital Multimeter Electrical

Source : pinterest.com