# How Many Amps is a Car Battery

Car battery is one of the most crucial elements of a car. It provides enough cranking amperes to start the car’s engine.

Plus, the amperage of a car battery helps to provide powers to other electronic components when the engine is switched off.

But do you know what the Amps are of your car battery?

And this ultimate guide covers everything you need to know.

Here, what I am going to cover:

How many amps is a car battery

## How many amps are in a 12-volt car battery?

How do you find out how many amps a battery has

## How many amps are in a AA battery?

Should I charge my battery at 2 or 10 amps?

So, let’s get started here.

## How many amps is a car battery?

First, it depends on the battery of your car. Each of the car battery has a specific rating.

Some cars have more powerful batteries measured in Amp-hours. Also, how many amps are a car battery depends on the size of it.

Logically, the bigger the batteries the more current it will provide.

Therefore, the chemistry a battery use also determines the amps of the car battery.

So, it is typical to measure the amps of a car battery.

## How many amps are in a 12-volt car battery?

As I told before, it is typical to measure how many amps are in a 12-volt car battery.

However, the amount of current a 12-volt battery supply largely depends on its size and type.

For example, a 12-volt car battery has specially designed to provide current in the range of hundred-plus amperes to start the car’s engine.

The capacity of a 12-volt car battery is 48 Ah. That means if you charge the battery fully, it delivers you 1-amp for 48 hours and 2-amps for 24 hours.

## How do you find out how many amps a battery has?

In this chapter, I let you know how to figure out the amps of a car battery. Typically, I have used several methods to find out the amps rating. So, let’s check it out.

### Check the battery tag

Checking the battery tag is the easiest way to find out the amps of a car battery.

You can get the amps rating by looking at the tag of your car battery.

Generally, the range of amps of a car battery is between 40-Amps to as high as the low 100.

That’s why there are no indefinite amps set in a 12-volt car battery.

However, most of the battery manufacturer doesn’t write the actual amps rating on the battery tag. As a result, it is tough to find out how the amps of the battery.

The general thumb of rule is- the bigger the car the more amps a battery has.

### Use a chart

Using a chart is another simple way to find out the amps of a battery. On the battery tag, you can find what the class of the battery is. And it helps you to measure the amps of a battery.

When you know the class of the battery you can bring out the amps by looking up the chart.

### Using Ohm’s Law

Ohm’s Law is a formula that helps to find out the amps of a battery.

To figure out the amps applying this formula, you should know the voltage and resistance of the battery.

The formula of Ohm’s Law seems like this:

I=V/R

Note: You must use a digital multimeter if you want to find out the amps applying this formula.

To know the voltage of the battery, set the multimeter to DC. Then, set the red lead on the red colored battery terminal.

Next, position the black lead to the negative terminal in which color is generally black.

### Use a resistor

If you want to measure the amps scientifically, then use a resistor. It gives you the right amps rating of your car battery.

To get an accurate result, you need to make sure that you charge the car battery fully.

A resistor can be 1 ohm and two-hundred watts.

After hooking up the resistor with your battery, you should check it every hour to see how much time it takes your battery to drop 12.6 volts to 12 volts. It’s about a fifty percent drop in power.

When it happened, take the current measured it through the resistor and multiple it with the time it takes to drop to get the point.

For example, if it takes 9 hours to drop to 12v, then the amp of your battery is 108.

### Use a voltmeter

Connecting a voltmeter, you can also get the amps rating of your car battery.

A voltmeter can read 12-13v if you charge the battery fully. Each of the cells of your battery is 2.1v. So, if there have six cells in the battery, the total number becomes 12.6v.

However, this number may reduce relying on the age of the battery.

## Should I charge my battery at 2 or 10 amps?

It is the most common question when it comes to charging a battery. What charger you should use 2 or 10 amps determine the charge time.

Indeed, it is recommended not to charge your car battery so fast using anything that crosses 20 amps.

Slow charging using 2 or 10 amps is considered the best way. Fast charging is a reason to overcharge the battery and it will be a reason to decrease the performance of it.

Yet, Can I charge the car battery at 2 or 10 amps?

The answer to this question is- you can charge your battery at 2 or 10 amps.

However, it is preferable to charge your car battery at 10 amps instead of 2 amps.

## Conclusion

Again I want to say how many amps is a car battery mostly depends on the battery itself.

The bigger your car will be the more amps it has. Besides, the chemical of the battery also determines the amps.

However, if you want to know the amps of your car battery, you can find out it following several ways.

Here how you can figure out the amps:

Checking the battery tag

Using a chart

Using Ohm’s Law

Using a resistor

Using a voltmeter

Indeed, I have covered everything you need to know.

Have I missed anything in this guide I need to include? Let me know by sharing your thoughts.