# Can You Charge a 12 Volt Battery With a Car?

Published on: October 5, 2022
Written by Chris Dominic / Fact-checked by Nova Scarlett

Most people think that you can only charge a 12-volt battery with a car. However, this is not the case. You can actually charge any size battery with a car.

The reason that people think that you can only charge a 12-volt battery with a car is that most cars have a 12-volt charging system.

• Park your car in a safe, level location;
• Turn off the engine and all electrical accessories;
• Open the hood and locate the battery;
• Remove the negative (-) terminal cable from the battery first, then remove the positive (+) terminal cable;
• If you have a standard automotive battery charger, connect the charger to the battery terminals following the manufacturer’s instructions;
• If you are using jumper cables to charge the battery from another vehicle, make sure both vehicles are turned off and do not allow the clamps to touch each other as this can cause sparks;
• Connect one red clamp to the positive (+) terminal of the dead battery, and connect one black clamp to an unpainted metal surface on your car away from the battery (this will serve as a ground);
• Then connect one red clamp on the other vehicle’s working battery positive (+) terminal, and finally connect one black clamp to an unpainted metal surface on that vehicle;
• Start the working vehicle, let it idle for a few minutes, and then rev up its engine slightly. Let it run for 5-10 minutes before disconnecting everything in reverse order;

## How to Charge a 12 Volt Battery?

If your car or truck has a 12-volt battery, you’ll need to know how to charge it. The process is actually pretty simple, and there are only a few things you need to know before you get started.

First, make sure that the charger you’re using is rated for 12-volt batteries and how many mAh.You can find this information on the charger itself or in the documentation that came with it. If you’re not sure, err on the side of caution and use a lower voltage charger.

Next, hook up the positive (red) lead from the charger to the positive terminal on the battery.

Then, do the same with the negative (black) lead from the charger to the negative terminal on the battery. Make sure that these connections are tight and secure; otherwise, they may come loose and cause sparks or damage to your equipment. Finally, plug in the charger and let it do its job!

Depending on how discharged your battery was, to begin with, it may take several hours to fully charge. Once it’s finished charging, unplug everything and put away your tools – you’re all done!

## Charging a 12V Battery from Another 12V Battery!

Assuming you have two 12V batteries of the same voltage, current, and capacity, it is possible to charge one battery from another. This can be done by connecting the positive terminal of the first battery to the positive terminal of the second battery, and then connecting the negative terminal of the first battery to the negative terminal of the second battery.

## How Many amps Do I Need to Charge a 12 Volt Battery?

A 12-volt battery can be charged with as little as 1 amp, but it will take much longer to charge. A more common way to charge a 12-volt battery is between 10 and 20 amps. The time it takes to charge a 12-volt battery depends on the capacity of the battery and how many amps are used to charge it.

## Can You Charge a 12V Battery With 12V?

Yes, you can charge a 12V battery with 12V. This is because the voltage of the battery is not what determines the amount of current that flows through it. The current is determined by the resistance of the load, which in this case is the battery.

So, if you connect a 12V battery to a 12V power source, the current will flow through the battery and charge it.

## How to Charge a Car Battery That is Not in a Car?

If your car battery is not in a car, you can charge it by using a battery charger. You will need to connect the positive and negative terminals of the battery charger to the corresponding terminals on the car battery. Once the connection is made, you can plug in the charger and turn it on.

The charging process will take some time, so be patient. Once the battery is fully charged, you can disconnect the charger and reconnect the car’s battery cables.

## Can I Charge Another Battery With My Car?

If you’ve ever been caught with a dead battery, you know the feeling of panic that sets in. Will your car start? How long will it take to get a jump start?

Can I charge another battery with my car? The good news is, if you have a healthy car battery, you can use it to charge another battery. All you need is a set of jumper cables and about 30 minutes. On the other hand, If your car battery dies, you may be tempted to add water to it in order to get it working again.

Here’s how to do it:

First, make sure both batteries are turned off. Next, attach one end of the positive (red) cable to the positive terminal of the dead battery.

Then, attach the other end of the positive cable to the positive terminal of the live battery. Now do the same for the negative (black) cables, attaching one end to the negative terminal of the live battery and the other end to the ground metal on the car frame or engine block (away from any moving parts!). Once both cables are attached, turn on the ignition of the running vehicle for about five minutes before starting the stalled vehicle.

At last, this gives your dead battery a little boost so the alternator can recharge it when you start your car. If your car doesn’t start after five minutes, let it rest for a few minutes before trying again.

## How Much Charge Does a Car Battery Need to Start?

A car battery needs a charge of 12 volts to start. The amount of charge that a battery can hold depends on the size of the battery and the number of cells. A typical car battery has six cells, each of which can hold a charge of 2 volts.

So, a fully charged car battery will have a total charge of 12 volts.

## Charging a Battery With Another Battery

We all know how frustrating it is when our phones, laptops, or other devices run out of battery power when we’re nowhere near an outlet. But did you know that you can actually charge a battery with another battery? It’s true!

And it’s not just limited to batteries – you can also use this trick to charge your cell phone with a AA battery. Here’s how it works:

1. Find a flat surface on which to place your two batteries, making sure that the + and – symbols are facing up.

2. Place one battery on top of the other so that the + of the bottom battery is touching the – of the top battery.

3. Wait for 10-15 minutes, then remove the top battery and check to see if the bottom battery has charged. If so, great!

If not, try again with fresh batteries.

## FAQs

### Can You Charge a 12 Volt Battery from Your Car?

Yes, you can charge a 12-volt battery from your car. You’ll need to connect the positive and negative terminals of the battery to the corresponding terminals of the car’s electrical system. Be sure to disconnect the car’s negative terminal first, then the positive.

Once connected, start the car and let it run for a few minutes to charge the battery.

### Can I Charge a Small 12 Volt Battery With a Car Charger?

Yes, you can charge a small 12-volt battery with a car charger. There are a few things to keep in mind when doing this, however.

First, make sure that the car charger is designed for use with 12-volt batteries. Some car chargers are only meant for charging larger batteries, so using one of these could damage your smaller battery.

Second, be aware of how much power your car charger is putting out. Too much power can damage your battery, so it’s important to check the output of your charger before using it.

Finally, make sure to disconnect the charger from the battery once it is fully charged; leaving it connected for too long can overcharge the battery and shorten its lifespan.

### How Long Does It Take to Charge a 12 Volt Battery in a Car?

Assuming you are talking about a lead-acid battery, it should take about 6-8 hours to charge a 12-volt battery in a car. If the battery is completely dead, it may take up to 12 hours to charge.

### Can I Use My Car to Charge a Battery?

If you’re wondering if you can use your car to charge a battery, the answer is yes! However, there are a few things to keep in mind before doing so. First, make sure that the battery you’re trying to charge is compatible with your car.

Some batteries are not meant to be charged using a car’s charging system. Second, be aware that charging a battery via your car’s charging system can take longer than other methods – so plan accordingly. Finally, remember to safety first!

When working with batteries, always exercise caution and follow all safety instructions provided by the manufacturer.

### How Can I Charge My 12 Volt Battery Without a Charger?

If your 12-volt battery is dead, you can’t charge it without a charger. However, if the battery is only low on power, you may be able to jump-start it using jumper cables and another car’s battery.

### Can You Charge a Battery With Cigarette Lighter in Car?

Yes, you can charge a battery with a cigarette lighter in a car. However, it is not recommended to do so because it can be dangerous. The cigarette lighter in a car produces heat and if the battery is not properly insulated, the heat can damage the battery or cause it to explode.

It is also important to make sure that the cigarette lighter is turned off when you are finished charging the battery so that it does not overheat.

## Conclusion

Yes, you can charge a 12-volt battery with a car. You’ll need to connect the positive and negative terminals of the battery to the corresponding terminals of the car. Once you’ve done that, you can start the car and let it run for a while to charge the battery.

Resources:

Rate this post