You should be able to find one in any hardware store and it’s a good idea to keep one in your car. Using a multimeter is one of the easiest ways to test your car battery.
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How to use a multimeter to test a car battery How many volts should a car battery have when fully charged?Ī car battery with a full charge should have at least 12.6 volts and measure at 13.7-14.7 when the engine is running. If they get brighter when you rev the engine it means the alternator is producing a charge, but at idle it may not be enough to charge the battery. If your headlights dim it means that they’re running off the battery and the alternator is producing only a small charge or none at all. If they stay at the same brightness your electrical system is probably fine. Simply start the car and turn on the headlights.The quickest and easiest test to see if there’s a potential problem is the headlight test. You can check your car battery quickly and easily yourself. Dead batteries are a common reason for roadside assistance calls and making sure your battery is in good condition could prevent the hassle of your car breaking down unexpectedly. Testing your battery is something you may not associate with regular car maintenance like getting an oil change, but the battery is needed for everything from starting your car to powering your car’s computers and devices.
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