Is it possible to charge the battery with a laptop

Frequent question: is it possible to charge a battery from a laptop power supply?

Yes, keep in mind that the load current of the block, look at the case and do not exceed it. Usually it is equal to 3 amperes. Do not forget that hydrogen is released when charging from batteries. Do not forget about the ventilation of the room.

So, you can use a computer power supply, disconnected from the device. It is enough to connect it to the battery using two meter wires, which must be closed together, forming a jumper.

Charger from a laptop power supply

Immediately connect the power supply block of the battery terminals cannot be connected. The output voltage is about 19 V, and the current strength is about 6 A. Current for charging 60 a/h battery is enough, and what to do with stress? There are options.

Charger from a laptop power supply can be sold in two completely different ways.

  • Without alteration of the power supply. It is necessary to connect a powerful light bulb from a car with a car battery sequentially with a car. Such a light bulb in this case will serve as a current border guard. The solution is very simple and affordable.
  • With alteration of the power supply. Here it is necessary to reduce the voltage of the laptop power supply for normal charging to 14. 14.5 V.

We will go in a more interesting way and briefly will tell you how easily it is possible to lower the voltage of the laptop power supply. The experimental block will be universal charging to the laptop under the name Great Wall.

First of all, we analyze the case, we try not to disfigure it very much, we still use it to use it.

As you can see, the block produces voltage. 19 in.

The board is built on Tea1751TEA1761.

For a better understanding of the case on one of the Chinese sites, there was a scheme of a very similar block.

The difference is only in the denominations of some details.

To reduce the output, we are looking for a resistor that connects the sixth leg of the TeA1761 and plus from the output of the power supply (in the photo is marked).

In the diagram, this resistor consists of two (they are also circled in a red line).

For convenience, we give the purpose and location of the legs from Datasheet Tea1761.

We fall out this resistor and measure its resistance. 18 kOhm.

We take out a variable or tuning resistor for 22 kOhm from the bins and set it up on 18 kOhm. We solder it to the place of the previous.

Gradually reducing the resistance, we achieve indications of 14. 14.5 V at the output of the power supply.

Having received the required voltage, you can disappear from the board and measure the current resistance. It amounted to 12.37 kom.

After all, you need to choose a permanent resistor, with how much as possible to this value the face value. We will have it a couple of 10 kOhm and 2.6 kOhm. Alas, nothing of the kind was found in SMD, I had to put the ends of the resistors in thermocyembrick.

We test the operation of the block. 14.25 V at the output. Voltage for charging a car battery just right.

Collect the power supply and connect the crocodiles at the end of the cord. (It is necessary to carefully check the polarity at the output of the cord, in some power units “-” it is the central wire, and “”-braid).

The charger from the laptop power supply works as expected, the current in the middle of the charging process is about 2-3 A. When the charging current falls up to 0.5-0.2 a, the charging process can be considered completed.

For convenience, the charger can be equipped with an ammeter screwed onto the housing, or a control LED, which will signal the end of the charge. As an additional measure of precautions, you can advise using at least some protection against re-attenuations.

Charging a car battery using a power supply unit from a laptop

There are quite a lot of motorists who are careful about their cars, for a long period of time have never been recharged or recharge the battery of a car using a charger.

possible, charge, battery, laptop

This happens when the climate in the region is quite comfortable. The absence of a protracted winter with severe frosts or exhausting multi.Day heat.

It is clear that this is just one of the factors that affects the long.Term operability of the battery.

Of course, the long.Term operation of the secondary power source of the car can guarantee constant attention to it, and its regular prevention.

The density of its electrolyte and the level in each of the accumulator cells must be checked preferably weekly. Electrolyte density must be brought 1.28 g/cm3.

On the case of each battery, special marks are applied, which indicate the maximum and minimum level of electrolyte.

To increase the level of electrolyte, it is necessary to add distilled water, hydrochloric acid is added only in exceptional cases, for example, when the electrolyte is spilled. The electrolyte density increases by charging the battery, charger or from the standard generator.

possible, charge, battery, laptop

It is necessary to regularly monitor the quality of the operation of all the devices of the battery power supply system-the correct voltage of the electro-regulator issued by the relay and the uninterrupted operation of the electric generator. The operation of the generator with an unhealthy drive belt can lead to the failure of the battery.

Of course, it is necessary to adhere to an elementary hygienic procedure, when caring for the battery, t.E. Checking the battery for the lack of cracks, leaks, any damage, as well as constantly contain the surface of the battery clean. As a rule, abundant pollution on the surface of the battery cover leads to a significant discharge of the battery.

It is important to periodically check the side network of the car, in the absence of a factor affecting the tips of the battery charge.

But, be it, no one, no one is safe from the fact that one fine day, a completely serviceable battery will turn out to be, to a critical level, which will not even allow the car engine to run. For example, you did not operate your car at all, or left it for a long time with the alarm turned on.

There is no way to “light”, and starting a car with a “pusher” is extremely not recommended. In this case, the optimal output will be to recharge the battery using a car charger. But the charger can not always be at hand, and there is no one to lend.

What will do in this case, is it really a hopeless situation?

There are quite a lot of fundamental electrical circuits for the manufacture of items on the Internet. But this requires a lot of time and, accordingly, the costs of material resources.

In this case, an ordinary power supply from the laptop may come to the rescue. Depending on the model of the laptop, individual indicators of power supply may not be significantly different.

In most of them, the current strength is 4.7 A, and the voltage of 19 V is at the output, which is sufficient for charging the car battery.

For connection, you must have two pieces of a copper multi-core wire about 2 meters long, a resistor with a capacity of 5 watts with a resistance of 1 ohm or a 12 volt light light instead of a resistor instead of a resistor. An important factor is the correct determination of the polarity of the power supply, which is done using a multimeter.

“Plus” from the charger we connect to the plus terminal of the battery, and “minus”. To the minus. But in this case, if you connect the power supply to the network, the voltage supplied will be 19 V, and 14.4. 15.0 V is required.

The process of hydrolysis is activated, the battery is heated, the electrolyte will boil and the power supply itself will overload. Therefore, in order to lower the voltage to the desired level, it is necessary to insert a 12 V light bulb from the block to the battery, or the resistor with the above rates. This scheme will make it possible to charge your car’s battery to a completely efficient state within 10-15 hours.

However, it is best, of course, to use good quality chargers specially designed for such purposes.

I warn you that all the manipulations described in the article are done at your own peril and risk, the author and the site are not responsible for the damage or property caused by these actions. Not confident in your abilities. Do not do!

How to charge a car battery with a laptop? If there is nothing to do at all

You can often hear the question of how to charge a car battery with a laptop. After all, it is far from always possible to use the devices to bring the battery to normal. And planting it is quite simple. Under some conditions, even the best battery may be discharged. So what to do if you are far from the charger. This can happen under various circumstances. You went, for example, to the cottage or stayed away.

At the same time, start the car, there is no pusher. You may not have labor, or there is a box of automatic. In any case, you will have to figure out how to get a car.

How to charge a car battery with a laptop? In fact, it is not difficult to do it. It is enough to attach your hands. Attention! To charge the battery in this way, you will have to collect a fairly simple electrical circuit. If you are not confident in your skills, it is better not to try to do it. In this case, direct current will be used for charging. Therefore, it is important to monitor the condition of the battery.

The reload can lead to the loss of the battery of its properties or even to the explosion. Before starting the charging process, it is imperative to unscrew the plugs from the cans. You will need to compile the simplest charging:

Charging from laptops most often produce a voltage of 19-20 V, current strength in them is about 5 A, power 80 W. An ordinary halogen light bulb is ideal here. Keep in mind that the more powerful it is, the higher the current strength will be higher.

The assembly of the device is as follows. Connect the wires to the conclusions of the charger. A light bulb is connected into a plus rupture. The wires should be attached to the battery terminals, while observe the polarity. If everything is collected correctly, then the light should light up. Periodically check the voltage on terminals. When it is up to 13.5 V, the battery will be ready to use. Usually for full charge of the battery discharged to zero is 7-10 hours. If the battery is not completely discharged, then in order to start the car there will be enough 2 hours.

If there is no charger from the laptop, then in principle you can use the power supply from any computer. But there are some nuances that do not allow this device as a full charging device. The fact is that the voltage issued by the PSU (power supply) is 12 V, while the car battery requires 14. Thus, it is possible to charge the battery with a block by only 30-40%. But this is enough to start a working car. Further charging will go from the generator, well, or get to the place where there is quite normal exercise.

When compiling such a device, be extremely careful. The system does not have a galvanic denouement, which threatens with electric shock. Therefore, include the device on the network only after the final assembly. During his work, do not touch the non.Insulated sections of the wire. For assembly, you need:

The device is assembled as follows. The wires join the fork. Minus wire is immediately attached to the corresponding terminal terminal. Plus divided into 3 equal parts. Diodes and light bulb are sequentially connected into tears. Diodes from an old energy.Saving light are suitable for assembly. If you use, then for complete charging the battery requires about 15 hours.

When installing two charging time will decrease by 2 times. A further increase in the number of diodes will only lead to greater energy consumption. Connect the collected charging to the network. Just make sure that the battery does not boil.

It is far from always possible to collect a charger, even from ordinal materials. Therefore, finally, some tips for what to do if the battery does not twist the starter:

  • Always have wires for lighting in the trunk. The connection procedure is as follows, first connect the plus to the discharged battery, then the other end of the wire to the output of the charged battery. Further, the wire is connected to the minus terminal of the donor, the second crocodile is attached to any part of your car body. Then they start a work machine and let it work for a few minutes. If everything is done correctly, then your car will start. Read more in more detail the article “How to lightly light a car from another car”;
  • If your battery twists a little starter, but this is not enough for the factory for cold, then ask the battery from a neighbor. Get and warm your car. Then you can probably start on your battery.

Conclusion. As a rule, problems with the battery happen suddenly. Therefore, motorists are not ready for such a turn of events. In this case, it is nice to know how to charge a car battery with a laptop. After all, this problem can take a lot of time and nerves. And to solve in a traditional way, that is, using the factory charge, it is not always possible.

Is it possible to charge the battery charging from the laptop ~ net.Gadget

How to charge the battery with a laptop? If there is nothing to do at all

Often we hear the question of how to charge the battery with a laptop. After all, do not always use the devices to bring the battery to normal. And to plant it quite easy.

With some criteria, the most good battery can be discharged. So, after all, to do if you are far from the charger. This can happen under various circumstances.

You went for example, to the cottage or stayed away.

With all this, an option to start a car, there is no pusher. You do not have labor, or there is an automatic transmission. In any case, you will have to invent how to get a car all the same.

How to charge the battery with a laptop? In fact, this is easy to do. Enough with your hands.

Attention! To charge the battery with this method, for you you will have to collect a rather ordinary electronic circuit. If you doubt your own abilities, it is better not to try to do it.

Laptop battery pack DIY connectors

Then unchanged current will be used for charging. Therefore, it is important to take care of the condition of the battery.

The reload leads to a battery loss of its own parameters or even to an explosion. Before the loading process, certainly turn out the plugs from the cans. To assemble the simplest charging, you need:

Charging from laptops in most cases give out a voltage of 19-20 V, their current has about 5 A, power 80 W. The ordinary halogen light bulb is completely suitable here. Keep in mind that the stronger it is, the higher the current strength will be higher.

The assembly of the device occurs in this way. Connect the wires to the conclusions of the charger. A light bulb is connected into a plus rupture. The wires should be attached to battery terminals, while observing the polarity. If our client is collected correctly, then the light should light up.

At times inspect the tension on the terminals. When it approaches 13.5 V, the battery will be ready to use. Usually, 7-10 hours go to the full charge of the battery discharged to zero. If the battery is not completely discharged, then if you set the target to start the car for 4 hours.

possible, charge, battery, laptop

How to charge a car battery with a laptop

If there is no charger from the laptop, then by and large use the power supply from at least any computer. But here there are some aspects that do not allow using such a device for real charging.

There is that the voltage issued by the PSU (power supply) is 12 V, although the battery requires 14 in a real charge of the car. Such a macar, to charge the battery with the help of the block of course only by 30-40%. But this is enough to start a working car.

Further charging will go from the generator, and in another way you will reach the place where there are completely ordinary charging.

When assembling such a device, be very careful. The system does not have a galvanic denouement, which is fraught with electric shock. Therefore, on the network, include the device only after the final assembly. At one time, do not touch the non.Insulated sections of the wire at one time. For assembly, you will need:

The device is assembled in this way. The wires join the fork. Minus wire is immediately attached to the corresponding terminal of the battery. Plus divided into 3 equal parts. Diodes and light bulb are alternately connected to tears. Diodes with the previous energy.Saving light are suitable for assembly. If you use one, then for the working charging of the battery will need about 15 hours.

During installation, 2 charging time will decrease in two. The upcoming increase in the number of diodes will only lead to greater energy consumption. Connect the collected charging to the network. Just look so that the battery does not boil.

There is no chance to collect a charger, even from the forced materials. Therefore, in the end, a few tips, what to do if the battery does not twist the starter:

  • Always have wires for lighting in the trunk. The connection procedure is subsequent, at first connect the plus to the discharged battery, later the other end of the wire to “” the withdrawal of the charged battery. Then the wire is connected to the minus terminal of the donor, the 2nd crocodile is attached to any part of the body of your car. Then they start a work machine and let it work for a few minutes. If something remains to do our client correctly, then your car will start. Read more in more detail the article “How correctly to light a car from another car”;
  • If your battery is slightly twisting the starter, alas, this is not enough for the factory to be cool, then ask the battery from a neighbor. Get and warm your own car. Then you can probably start on your own battery.

How to charge a 12V battery 19V adapter of laptop power | Charger from a laptop power supply

A simple way to charge a car akumulator, if there is no charger. In the video I will show how.

Conclusion. Usually, difficulties with batteries happen at one point.

Therefore, motorists are not prepared for such a turn of events. It is good to know how to charge the battery with a laptop. After all, this inconsistent can take away a long period and nerves.

And to solve the usual method, in other words, the introduction of factory charging is not possible every time.

How to charge a battery without a charger: tips, photo

How to charge a battery without a charger? This question often arises in motorists who actively operate the vehicle. After all, a power source can be discharged along the way where there is no access to the electric network.

The significance of a car battery

To maintain the starter, power unit and other mechanisms in the working state, a battery is required.

If during the start of the engine there is a few idle starting, then the charge runs out. The battery is used as a backup source, as well as for emergency launch.

It depends on the performance of the power source and whether there will be problems with transport in winter, along the way.

possible, charge, battery, laptop

How to identify a discharged car battery?

Determine whether the battery sat down or not, is easy. There are devices and sensors on new machines, with which the degree of charge is monitored. There are no such indicators on domestic cars, so the owners are guided by the following indicators:

  • The instrument panel is practically or completely not shining.
  • When the ignition is connected, the sound changes radically.
  • The launch of the motor is accompanied by clicks, extraneous sounds.

Watch the video how to charge the battery from charging an electric screwdriver.

How to charge a power source without additional devices?

How to charge a car battery without a charger? Is it possible? This option can be implemented, although a certain preparation will be required.

In order to charge the battery without a charger, you need certain knowledge in electronics. To do this, make adjustments to the functioning of the relay regulator, the voltage indicator increases. But such actions are performed only by masters who can do everything competently and accurately.

At home, the battery is reanimated, performing the following actions:

  • Sources that consume electric energy are disconnected. Such devices include an acoustic system, registrars and headlights, so on.
  • With a standard speed of transportation, the transmission decreases. As a result, the operability of the generator increases.

In the event that the electric system works normally, then the actions performed will allow you to restore the charge without charging. After these measures, the fuel costs increase.

Before performing the above recommendations, we test the main nodes and electrical system. Particular attention is paid to the operability of the generator.

If the battery did not work out, then it is worth establishing the reason. As a rule, this is due to:

  • Belt damage, which is focused on the generator.
  • Voltage stabilizer.
  • Violation of the integrity of the brushes, their wear.
  • Bad tension of the generator belt.

Methods of charging a power source

If the question arises of how to charge a battery without a charger, then this can be realized in several ways.

Cooking

Another power source is used to restore the sowing auto.Accumulator. This method differs in that with its help the battery is restored quickly enough.

The execution requires wires that are equipped with clamps that have the required section. The use of thin and damaged wires is not allowed. Because their integrity is easy to violate.

For coughing, wires are used, which are equipped with a rubber braid. After all, plastic is destroyed at a negative temperature.

Wires are suitable for lighting, the permissible current force of which is 200-300 amperes. They concentrate wide clamps that provide appropriate contact.

When connecting, focus on the shade of wires. Red cables are connected to a positive terminal, only black wires only. All connections are performed before the engine is started. Only after that the engine of the donor machine starts for 5-7 minutes.

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This method allows you to reanimate the battery for a while. Full charging of the car battery is performed from the network.

Towing

To restore the charge, towing is used if vehicles are equipped with a manual gearbox. The battery must be slightly charged, since the method consists in revitalizing the generator.

For towing, a strong cable is required, which is able to withstand a serious load.

The method is implemented with vehicles or with the help of assistants. To restore the battery, 1-2 arrival is performed.

Restoration by means of a charger from a portable computer

You can not always use the options that are listed above. Therefore, drivers are wondering how to charge a car battery with a laptop?

This will require certain items:

To prepare the circuit of the power supply from the charger, the wires are removed for the minus, as well as the plus. The negative wire is focused on the outside, and the positive. Inside.

Connection is carried out according to the following scheme:

  • The first to lead to the negative terminal of the battery of the minus wire.
  • A resistor or a productive bulb with established characteristics, indicators are introduced into a prepared gap. Actions are performed taking into account the rules.

Experts recommend introducing a resistor with the required characteristics into the circuit, since there will be no problems with a change in resistance.

Using this method, you can charge the battery completely. But the process is carefully controlled. The voltage is constantly checked at the terminals. As soon as 14 volts are displayed on the voltmeter, the procedure stops. You can set the end of the process by paying attention to the state of the electrolytic composition.

Recharge from the network

This method differs from the previous one in that the connection is carried out directly to the outlet. The adapter is not used in this case. To create resistance, use a lamp (220V). A diode bridge is also introduced into the circuit, with which alternating current is straightened.

Connection of the battery is carefully performed. Rules and norms are necessarily observed. Before connecting, it is checked whether the diagram is correctly prepared and collected. All elements that are part of it are tested. This is the only way an effective and functional scheme creates.

How I charged the battery

I want to tell how I charged the battery with a charging for a laptop.

The problem overtook suddenly. The battery was unleashed. Neither my neighbor, a charger (car!) No. Since I did not want to push the car, and there was no one, I had to find a way out of the situation.Looking carefully around the apartment, charging from the laptop got into the eye. At first glance, I was even surprised why I didn’t think about her right away. But when I took her in my hands and looked at the parameters, it became clear that she was not quite suitable for charging batteries.Parameters: output voltage. 20V, current strength. 3.25A.It is clear that it is impossible to connect it directly. The voltage of the battery charge should not exceed 15V and the current in the circuit of the charger of the laptop, if it is connected directly to the discharged battery, will be significantly more than 3.25A.But since it was necessary to go, it was decided to connect sequentially with the battery, the load (resistance) for dumping voltage. As a load, I took a spare light from the headlight. I honestly admit that I did not carry out any calculations, I just connected the wires and connected the ammeter

Immediately came to the contacts of the lifting spiral and the ammeter showed about 4a, which was clearly a bit too much. In the next contact, the current in the circuit turned out to be a little more than 3a, which, in principle, was normal for charging, but still I decided not to hold the charge at the maximum permissible load and connected the bulb through two spirals, as a result, the ammeter showed a current 2.5a. When I checked the voltage recession on the light bulb, the voltmeter showed 5V, respectively, on the 15V battery, which was within normal limits.

The system made in haste, charged the battery for 3 hours. The current in the circuit gradually fell from 2.5a to 1.85A, and the charging from the laptop during this time almost did not heat. Then I decided that you can try to get a car. I connected the battery and started my car without problems. It is difficult to judge the degree of battery of the battery, but from a subjective point of view (by the turnover of the starter), I did not notice the difference with the normal operating mode when the battery is completely charged.I think this version of the battery charge is not the most optimal, but in extreme cases it will do. All that is needed in addition (subject to the presence of a laptop) is a piece of cable, and you can get a light bulb from the headlight. It should also be borne in mind that the output voltage of different charging devices may differ and you need to select the corresponding load.

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