![]() If not, you will get an artificially high reading. These devices are inexpensive and readily available, and they make testing your car battery quick, easy and accurate.īefore testing your battery, you should let it rest for a while – it’s best to leave it overnight or longer and then test it rather than testing it just after the engine has been running. The best way to do it is to use a multimeter. So the next question you will want to know the answer to is, how do you test your car battery? With the engine running, on the other hand, you should get a reading of 13.7-14.7v. The answer is, a healthy, fully charged battery should give you a reading of around 12.4-12.6v when the engine is not running. In fact, if the reading tells you 12v, your battery is more or less empty. How Many Volts is a Car Battery? Not so simpleĬar batteries are 12v batteries, but you might be surprised to discover that if you test one, you shouldn’t get a reading of 12 volts. It also demonstrates how to test a car battery using a multimeter, something we will talk more about below. If you are looking for a preview of some of the things we are going to be talking about, you can check out this video before reading on. ![]() ![]() It’s important not to let your battery run down completely, but you’ll also want to know what kind of condition it’s in even if it’s not completely dead – so when it comes to testing it, you’ll need to know the answer to the question, how many volts is a car battery? With that in mind, you’re sure to want to keep your battery in good shape. A battery is one of your car’s essential components – most importantly, it provides the charge to fire up the engine, and without it, your car wouldn’t start at all.
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