# How To Charge 12V Battery With Power Supply?

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Last Updated on June 30, 2022 by Ellis Gibson (B.Sc. in Mechanical Engineering)

Most electronic devices come with a power supply that converts AC to DC. The DC voltage is then regulated to a safe level for the device. The same principle applies to batteries; however, the DC voltage must be higher than the battery’s rated voltage. For example, a 12V lead-acid battery requires between 13.6 and 14.4V to charge.

So, how to charge 12v battery with power supply?

To charge a 12v battery with a power supply, you will need to connect the positive lead of the power supply to the positive terminal of the battery, and the negative lead of the power supply to the negative terminal of the battery.

Let’s dig into it and see what’s inside.

## Step By Step Process Of How To Charge 12V Battery With Power Supply?

Here I will explain you step by step process of how to charge 12v battery with power supply? let’s see how to charge 12v battery with power supply.

It is a common misconception that you need a special charger to charge a 12V battery with a power supply. In fact, you can use any type of charger that outputs 12V or more. The most important thing to remember is to never exceed the maximum voltage rating of the battery, which is typically 14.4V.

If you’re using a power supply that doesn’t have a built-in charger, you’ll need to connect it to an external charger. The easiest way to do this is to use a DC-to-DC converter. These converters are available at most electronics stores and are relatively inexpensive.

Once you’ve connected the power supply to the charger, simply plug it into the wall and turn on the power. The charger will do the rest, charging the battery until it is full.

If you’re using a power supply with a built-in charger, the process is even simpler. Just plug the power supply into the wall and turn it on. The charger will automatically start charging the battery.

Once the battery is fully charged, you can disconnect the power supply and use the battery as usual.

If you wanted to watch a youtube video that shows you how to charge 12v battery with power supply? I have included a video below:

## Can I Use A Power Supply To Charge A Battery?

A lot of people have asked the question, “Can I use a power supply to charge a battery?” The answer is yes, you can use a power supply to charge a battery. All that is needed to recharge battery cells is DC current. With DC current, electrons will flow back into the battery, establishing the electric potential, or voltage, that a battery was meant to have when it’s fully charged.

It’s important to note that not all power supplies are created equal. The voltage and amperage of the power supply must match the battery’s voltage and amperage in order to avoid damaging the battery. That said, as long as the power supply can provide the necessary voltage and amperage, it can be used to recharge a battery.

So, if you’re looking to recharge a battery, be sure to use a power supply that can provide the proper voltage and amperage. With the right power supply, you can easily recharge batteries and keep them working like new.

Furthermore, If you have a DC power supply, you can recharge batteries easily. All you need is DC current. With DC current, electrons will flow back into the battery and establish the voltage that the battery is supposed to have when it’s charged.

## How Do I Charge A Car Battery With A Power Supply?

If your car battery has died, you may be able to charge it using a power supply. To do this, you will need to connect the positive and negative terminals of the power supply to the corresponding terminals on the car battery. Make sure that the power supply is set to the correct voltage for the car battery. Once the connection is made, turn on the power supply and allow the battery to charge for a few hours.

## Can I Charge My Car Battery With A Dc Power Supply?

If you’re like most people, you probably think that charging your car battery with a DC power supply is a good idea. After all, it’s a quick and easy way to get your battery up and running, right?

Wrong.

Charging your car battery with a DC power supply is actually a bad idea, and here’s why:

1. The voltage is too low.

Most well-regulated power supplies output 12V at all load levels. However, the voltage is way too low for charging a car battery. The common float charging voltages that can be left indefinitely on are 13.5V – 13.8V.

2. It could damage your battery.

If you charge your car battery with a DC power supply that is not well-regulated, it could damage your battery. This is because the voltage could fluctuate, which could lead to overcharging or undercharging of your battery.

3. It could damage your car.

If you charge your car battery with a DC power supply that is not well-regulated, it could damage your car’s electrical system. This is because the voltage could fluctuate, which could lead to problems with your car’s computer, lights, or other electrical components.

4. It’s just not necessary.

There’s really no need to charge your car battery with a DC power supply. You can simply hook up your car battery to a standard 110V AC outlet and let it charge overnight. This will ensure that your battery is properly charged and will not be damaged by a power surge.

Additionally, Your power supply needs to put out 12 volts at all load levels in order for this to work. The voltage is usually too low. Float charging voltages that can be left on indefinitely are between 13.5 and 13.8 volts.

## How Can I Charge My 12-Volt Battery At Home?

Assuming you would like a blog titled “How to Charge a 12-Volt Battery at Home”, here you go!

It’s easy to take our 12-volt batteries for granted. We use them to start our cars, power our tools, and even run our RV appliances. But what happens when our battery starts to run low? How do we recharge it?

Luckily, recharging a 12-volt battery is a pretty simple process. All you need is a battery charger and a few minutes of time. Here’s a step-by-step guide on how to do it:

1. Connect your 12-volt battery to the battery charger by attaching the BLACK negative cable from your charger to the negative terminal of the 12-volt battery. Make sure to use the clips or clamps to connect to the terminal securely.

2. Next, attach the RED positive cable from your charger to the positive terminal of the 12-volt battery. Again, use the clips or clamps to ensure a good connection.

3. Now, simply plug in your battery charger and let it do its job. Depending on the size of your battery, it may take a few hours to fully charge.

4. Once the charger indicates that the battery is fully charged, disconnect the cables in the reverse order that you connected them. That means disconnect the RED positive cable first, followed by the BLACK negative cable.

5. And that’s it! You’ve successfully charged your 12-volt battery.

Now that you know how to charge a 12-volt battery, you can keep your car, boat, or RV running smoothly. Just be sure to check your battery regularly to make sure it doesn’t get too low.

Besides this, To charge a 12-volt battery, you need to connect the negative cable from your battery charger to the negative terminal of the 12-volt battery. Make sure the connection is secure by using clips or clamps.

## How To Make A Power Supply From A Battery Charger?

A power supply is an electrical device that provides power to an electronic device. The most common type of power supply is a battery charger, which is used to charge batteries. There are two types of battery chargers: linear and switch-mode. Linear chargers are the simplest and most common type of charger. They work by converting the AC input power into DC output power. Switch-mode chargers are more efficient than linear chargers, but they are more complex.

To make a power supply from a battery charger, you will need:

-A battery charger -A power supply circuit -A power transformer -An AC to DC power converter

1. Connect the battery charger to the power supply circuit.

2. Connect the power transformer to the AC to DC power converter.

3. Connect the AC to DC power converter to the power supply circuit.

4. Turn on the power switch.

## How Do You Charge A Battery With A Variable Power Supply?

This is a common question that we get here at Battery University. The short answer is: you can’t. A variable power supply, also known as an adjustable power supply, is one where the output voltage can be varied. The output current, however, is fixed. This means that you can’t use a variable power supply to charge a battery.

The reason you can’t use a variable power supply to charge a battery is because batteries need a constant current to charge properly. If the current is too low, the battery will take a long time to charge. If the current is too high, the battery could be damaged. Variable power supplies can’t provide a constant current, so they’re not suitable for charging batteries.

If you need to charge a battery with a variable power supply, you’ll need to use a battery charger. Battery chargers are designed to provide a constant current to batteries, so they’re the perfect tool for the job. You can find battery chargers that are suitable for a wide range of battery types, so you should be able to find one that’s perfect for your needs.

## How To Charge A 12V Battery Without A Charger?

If you’re like most people, you probably don’t think about your car battery until it’s too late. It’s not until your car won’t start that you remember it even exists. And then, of course, you’re stuck trying to figure out how to charge a 12v battery without a charger.

Luckily, it’s not too difficult to do. Here are a few methods you can try:

1. Use a household battery.

If you have a household battery, you can use it to charge your car battery. Just make sure that the household battery is the same voltage as your car battery. To do this, connect the positive terminal of the household battery to the positive terminal of your car battery. Then, connect the negative terminal of the household battery to the negative terminal of your car battery.

2. Use a solar charger.

If you have a solar charger, you can use it to charge your car battery. Just connect the solar charger to your car battery following the instructions that came with the charger.

3. Use a hand crank charger.

If you have a hand crank charger, you can use it to charge your car battery. Just connect the hand crank charger to your car battery following the instructions that came with the charger.

4. Use a jump start.

If you have another car with a working battery, you can use it to jump start your car. Just connect the positive terminal of the working battery to the positive terminal of your car battery. Then, connect the negative terminal of the working battery to the negative terminal of your car battery.

5. Use a battery tender.

If you have a battery tender, you can use it to charge your car battery. Just connect the battery tender to your car battery following the instructions that came with the tender.

Hopefully, one of these methods will work for you and you’ll be able to charge your car battery without a charger.

## How To Charge A Car Battery With A Power Supply?

If your car has a dead battery, you can use a power supply to charge it. To do this, you’ll need to connect the positive and negative terminals of the power supply to the corresponding terminals on the car battery. Once the connection is made, the power supply will provide a charge to the battery, reviving it so that your car can start.

## How Do You Charge A 12V Car Battery With A 19V Charger?

This is a question that we get a lot here at the shop. And it’s a great question! The short answer is: you can’t.

Now, let’s expand on that answer a bit. A 12v car battery is designed to be charged with a 12v charger. A 19v charger is designed to charge a laptop battery. So, if you try to charge a 12v car battery with a 19v charger, you could damage the battery, the charger, or both.

Why is this? It has to do with the way that batteries are charged. When you plug a charger into a battery, the charger sends a charge into the battery. The battery then stores that charge until it is needed.

The voltage of the charger is important because it determines how much charge is sent into the battery. A 12v charger will send a certain amount of charge into a 12v battery. A 19v charger will send a different, and usually much higher, amount of charge into a laptop battery.

If you try to charge a 12v battery with a 19v charger, you are essentially overcharging the battery. This can damage the battery, and potentially the charger as well. So, it’s not worth the risk. Just use a 12v charger to charge your 12v car battery, and a 19v charger to charge your laptop battery.

## Can I Charge 12V Battery With 15V Charger?

This is a common question that people have when they are trying to figure out how to charge their 12v battery with a 15v charger. The answer is yes, you can charge your 12v battery with a 15v charger, but there are a few things that you need to keep in mind.

First, when you are using a 15v charger to charge a 12v battery, you need to make sure that the charger is set to the proper voltage. If the charger is not set to the proper voltage, it could damage the battery or the charger.

Second, you need to be aware of the fact that charging a 12v battery with a 15v charger will take longer than charging the battery with a 12v charger. This is because the 15v charger has to work harder to charge the battery.

Third, you need to make sure that you do not overcharge the battery. Overcharging the battery can damage the battery and shorten its life.

Fourth, you need to be careful when you are disconnecting the charger from the battery. If you do not disconnect the charger correctly, you could damage the battery.

Keep these things in mind and you should be able to charge your 12v battery with a 15v charger without any problems.

## How Do You Charge A Battery With An Adapter?

If you’re like most people, you probably use your laptop or other portable electronic devices on a daily basis. But have you ever stopped to think about how those devices are powered? Most likely, the answer is “no.”

Sure, you know that you need to plug your device into an outlet to charge it, but do you know how that process actually works? If not, don’t worry – you’re not alone. In fact, many people don’t know how charging a battery with an adapter works.

Here’s a quick explanation: when you plug your device into an outlet, the adapter converts the alternating current (AC) from the outlet into direct current (DC). This DC power is then used to charge the battery in your device.

It’s really that simple! So the next time you’re wondering how your device is able to hold a charge, remember that it’s all thanks to the adapter.

## When A 12V Battery Is Fully Charged?

This is a common question that people ask when they are trying to determine if their 12v battery is fully charged. There are a few different ways that you can tell if a 12v battery is fully charged, and we will go over all of them in this blog post.

The first way that you can tell if a 12v battery is fully charged is by using a voltmeter. If you attach a voltmeter to the terminals of the battery, it should read 12.6 volts. This is the voltage that a fully charged 12v battery should have.

The second way to tell if a 12v battery is fully charged is by looking at the specific gravity of the battery acid. This can be done with a hydrometer. If the specific gravity of the battery acid is 1.265, then the battery is considered to be fully charged.

The third way to tell if a 12v battery is fully charged is by using a load test. To do this, you will need to connect a load to the battery and see how long it takes for the voltage to drop. If the voltage drops below 10.5 volts within 30 seconds, then the battery is not considered to be fully charged.

If you want to make sure that your 12v battery is always fully charged, then you should invest in a battery charger. This will ensure that your battery is always being charged, even when you are not using it.

## What Voltage Is Too Low For A 12 Volt Battery?

This is a difficult question to answer without knowing more about the specific 12 volt battery in question. Generally speaking, however, most 12 volt batteries will begin to experience problems when their voltage drops below 10 volts. This can lead to a number of issues, including decreased performance, shorter lifespan, and difficulty starting or charging the battery. If you are experiencing any of these problems with your 12 volt battery, it is likely that it is time to replace it.

## Final Word

Most people use a power supply to charge batteries, but few know how to properly do it. Here are some tips.

A 12-volt lead-acid battery needs a voltage between 13.6 and 14.4 volts to charge. Applying more than 14.4 volts will damage the battery.

The power supply must be capable of delivering the charging current specified by the manufacturer. A small battery may only require a few hundred milliamps, while a large battery can take several amps.

It is best to charge a lead-acid battery at a slow rate. A rule of thumb is the 10-hour charge, which is 10% of the battery’s capacity in amp-hours. For example, a 100 Ah battery needs 10 Ah of charge.

Applying a voltage higher than 13.6 volts will damage the battery.

To conclude, be sure to charge your lead-acid battery at a voltage between 13.6 and 14.4 volts and at a slow rate.

## FAQ

### How To Charge Car Battery With Dc Power Supply?

If your car battery has died, you can use a DC power supply to charge it. First, make sure that the power supply is turned off. Then, connect the positive lead of the power supply to the positive terminal of the battery. Next, connect the negative lead of the power supply to the negative terminal of the battery. Finally, turn on the power supply and let it charge the battery for a few hours.

### How To Charge A Lithium Ion Battery With A Power Supply?

If you’re like most people, you probably use a lithium ion battery to power your phone or other mobile device. But what do you do when your battery dies and you need to charge it up?

Here’s a quick and easy guide on how to charge a lithium ion battery with a power supply.

First, you’ll need to identify the type of power supply you have. There are two common types of power supplies for lithium ion batteries: AC and DC. AC power supplies are typically used to charge batteries in devices like phones and laptops, while DC power supplies are used to charge batteries in larger devices like electric cars.

Once you’ve identified the type of power supply you have, you’ll need to find the right adapter. AC power supplies typically come with a standard USB adapter, while DC power supplies will require a special adapter that’s compatible with your battery.

Once you have the right adapter, simply plug it into the power supply and then into your battery. The battery will begin charging immediately.

That’s all there is to it! Now you know how to charge a lithium ion battery with a power supply.

### What Is The Difference Between Power Supply And Battery Charger?

The terms “power supply” and “battery charger” are often used interchangeably, but there is a difference between the two devices. A power supply is a device that provides power to an electronic device, while a battery charger is a device that charges a battery.

A power supply can be either AC or DC. AC power supplies are used to power devices that use AC power, such as laptops and desktop computers. DC power supplies are used to power devices that use DC power, such as cell phones and digital cameras.

A battery charger is a device that charges a battery. There are two types of battery chargers: linear and switch-mode. Linear battery chargers are the simplest and most common type of charger. They work by converting AC power into DC power and then regulating the voltage so that it is safe for the battery. Switch-mode battery chargers are more efficient than linear chargers and are often used in portable devices.

### How To Charge A Lifepo4 Battery With A Power Supply?

If you’re like most people, you probably have a power supply lying around that you use to charge your electronic devices. But did you know that you can also use that same power supply to charge a Lifepo4 battery?

Here’s how to do it:

1. First, make sure that your power supply is set to the correct voltage. Most Lifepo4 batteries are 3.7 volts, so you’ll need to set your power supply to that voltage.

2. Next, connect the positive lead of your power supply to the positive terminal of the battery, and the negative lead of your power supply to the negative terminal of the battery.

3. Finally, turn on your power supply and let it do its thing! Your battery should start charging immediately.

That’s all there is to it! Now you know how to charge a Lifepo4 battery with a power supply.

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