Car Battery Voltage Range

Car Battery Voltage Range0

What You Need to Know About the Ideal Car Battery Voltage Range

While most people know that car batteries are 12-volt DC batteries, there’s a lot more to the story than that, and a car battery voltage range test may be just what you need to find out all the necessary details about your battery’s overall condition. When comparing your car battery’s voltage measurements with the normal battery voltage range for that specific type of battery, you can learn a great deal about the current state of your battery and charging system, how likely it is to fail, and how important it might be to have it replaced. Which battery is right for your vehcile.

The Basics of Taking a Voltage Reading

Knowing your battery’s voltage range isn’t enough. You also have to know how to measure your car’s specific voltage at any given time, and be able to compare it with past results to find out whether or not the battery might be dying. The voltage range can be measured easily with a voltmeter. All you have to do is set the meter to a maximum value above 12-15 volts (a 25 or 50-volt range should be enough), and touch the positive cable of the voltmeter to the positive terminal of the battery, and the negative cable of the meter to the negative terminal. The reading should be fairly accurate, and you’ll find the results will be easy to interpret once you know exactly what to expect.

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What Is the Ideal Car Battery Voltage You Can Have?

Measuring your car battery’s voltage can be a great way to determine just how charged your battery might be. The ideal car battery voltage range will provide you with a relevant interval according to which you can measure precisely what the voltage says about the battery’s current charge. A perfect voltage (without any devices or electronic systems plugged in) is between 13.7 and 14.7V. If the battery isn’t fully charged, it will diminish to 12.4V at 75%, 12V when it’s only operating at 25%, and up to 11.9V when it’s completely discharged. This data and the way it relates to the design of your battery should provide you with some useful insight into the functioning capacity of your car battery.

Car Battery Load Tests

The load test is used to determine the voltage generated by the battery while a load is connected. Naturally, that value is much lower than the standalone voltage test, and it features its own voltage range. When subjecting your battery to a load test, you should get something between 9.5V and 10.5V for a complete period of 30 seconds. This value interval ensures that your battery can store and deliver enough current to start your car and power all your electronics and electric devices without any difficulty, automatically passing the load test in the process. Popular battery accessories: AutoCraft Booster Cables 12'.

Do You Have to Replace Your Battery?

So let’s say your battery measures less than 12V on a regular basis, and it failed the load test. Should you replace it? This isn’t a decision you can take lightly, especially if your car requires a more expensive battery. You can first start by using a charger or jump starting your vehicle. If that fails, you may also attempt to top up the distilled water in your battery for added performance, if your battery is the type that allows access to the cells. If your car battery voltage range doesn’t improve, then it might be time to start looking for a brand new unit.

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Last updated June 6, 2018