Automotive charger homemade. Car charger with their own hands. Tools and materials

Under normal operating conditions, electrical system car self-sufficient. We are talking about power supply - a bunch of generator, voltage regulator, and rechargeable batteryWorks synchronously and provides uninterrupted nutrition of all systems.

This is in theory. In practice, car owners make amendments to this slim system. Or the equipment refuses to work in accordance with the established parameters.

For example:

1. Operating a battery that has exhausted its resource. Element "Does not hold" charge
2. Irregular trips. Long-term plain vehicle (especially in the period "winter hibernation") leads to a self-discharge of acb
3. The car is used in short trips mode, with frequent joining and starting the motor. Akb just does not have time to recharge
4. Connection additional equipment Increases the load on the battery. Often leads to an elevated self-discharge current when the engine is turned off
5. Extremely low temperatures accelerates self-discharge
6. Faulty fuel system leads to an increased load: the car starts not immediately, it is necessary to twist the starter for a long time.
7. A defective generator or voltage control does not allow properly charge the battery. This problem includes worn power wires and bad contact in the charge chain
8. And finally, you forgot to turn off the headlight, dimensions or music in the car. For a complete discharge of the battery in one night in the garage, sometimes it is quite easy to close the door. Salon lighting consumes a lot of energy.

Any of the listed causes leads to an unpleasant situation: You need to go, and the battery is unable to turn the starter. The problem is solved by an external feed: that is, the charger.

In the Four Proven and Reliable Chargers for the car from simple to the most difficult. Choose any and she will work.

Simple charting device for 12V.

Charger with charging current adjustment.

Adjusting from 0 to 10a is carried out by changing the delay in the opening of the trinistra.

Charger diagram for battery with self-disclosure after charging.

For charge batteries with a capacity of 45 amps.

Scheme of a smart charger that warns not proper connection.

It is absolutely easy to assemble it. An example of a charger made of uninterrupted.

Any car charger circuit consists of the following components:

• Power Supply.
• Current stabilizer.
• Charge strength regulator. It can be manual or automatic.
• Current level indicator and (or) charge voltage.
• Optional - charge control with automatic shutdown.

Any charger, from the simplest, to the intelligent machine - consists of listed elements or combinations thereof.

Scheme simple for car battery

Formula of normal charge Simple, as 5 kopecks - the base capacity of the battery, divided by 10. The charge voltage must be a little more than 14 volts (we are talking about a standard starter battery 12 volts).

Each motorist is sooner or later there are problems with the battery. I did not escape this fate and me. After 10 minutes of unsuccessful attempts to start your car decided that you need to purchase or make yourself charger. In the evening, making an audit in the garage and finding a suitable transformer there decided to charge himself.

There, among unnecessary junk, there was a voltage stabilizer from an old TV, which in my opinion is wonderfully suitable as a hull.

Having shifted the endless expanses of the Internet and actually appreciating my strength chose the most simple scheme probably.

Printing the scheme went to a neighbor who is fond of radio electronics. For 15 minutes I scored the necessary details for me, cut off a piece of foil textolite and gave a marker for drawing boards. Having spent around the hour of time, I painted an acceptable fee (installation of the spacious size of the hull allow). How to streak a fee to tell me, about this a lot of information. I took my creation to my neighbor, and he prohibited her. In principle, you could buy a circuit board and do everything on it, but as they say to a gift horse ....
Drilling all the necessary holes and withdrawing to the monitor screen of the transistors, I took the soldering iron and after about an hour I had a ready-made fee.

Diode bridge can be bought on the market, the main thing is that it is designed for current at least 10 amps. I found diodes D 242. Their characteristics are quite suitable, and on a piece of textolite I saved the diode bridge.

Thyristor must be installed on the radiator, since when working it is noticeably heated.

Separately, I must say about the ammeter. He had to buy in the store, there the seller consultant picked up and the shunt. The scheme decided to modify a little and add the switch so that the voltage can be measured on the battery. Here, too, it took a shunt, but when measuring the voltage it is not connected in parallel, but in sequence. The calculation formula can be found on the Internet, it will be added from myself that the power dissipation of the shunt resistors is of great importance. According to my calculations, she had to be 2.25 watts, but I got a 4 watt shunt. The reason for me is unknown, there is not enough experience in such matters, but by deciding that I basically need an ammeter reading, and not a voltmeter, I followed. Moreover, in the voltmeter mode, the shunt was noticeably heated for 30-40 seconds. So, by collecting everything you need and checking everything on a stool, I took the case. Fully disassembled the stabilizer, I took all his stuffing.

By placing the front wall, I drilled holes for an alternating resistor and the switch, then the drill of the small diameter around the circle drilled the holes under the ammeter. Sharp edges frustrated with a file.

A little bit of her head over the location of the transformer and the radiator with a thyristor, stopped at this option.

I bought a couple more crocodile clamps and all-charging is ready. A feature of this scheme is that it works only under load, so collecting the device and not finding the voltages at the outputs voltmeter do not rush me to scold. Just hang on the conclusions at least a car light bulb, and you will be happy.

Take a transformer with a voltage on the secondary winding of 20-24 volts. Stabilitron D 814. All other elements are indicated in the diagram.

Long exploitation of the car leads to the fact that the generator stops charging the battery. As a result, the car no longer starts. To revive the car requires a charger. In addition, acid-lead batteries have increased sensitivity to temperatures. Therefore, problems may arise with their work if a minus temperature outside the window.

The charger for the car is not particularly technical complexity. To assemble it, it is not necessary to have any highly specialized knowledge, sufficiently adherence and smelting. Of course you will need certain detailsbut they can be easily purchased on the radio launcher almost for nothing.

Varieties of chargers for cars

Science does not stand still. Technologies are developing with incredible speed, it is not surprising that transformer charging devices gradually disappear from the market, and they come to replace impulse and automatic memory.

The pulsed charger for the car has a compact size. His just use, and in contrast to transformer type, this class devices provide a complete battery charge.. The charging process takes place in two stages: first at constant voltage, then at a current. The design consists of the same type of schemes.

Automatic charger for the car is extremely simplicable in operation. In fact, this is a multifunctional diagnostic center, which is essentially extremely difficult to assemble.

The most advanced devices of this class will notify you by the signal when the pole is incorrect. Moreover, the supply of electricity will not even begin. You can not get around the diagnostic functions of the device. It is capable of measuring battery capacity and even charge level.

IN electrical circuits There is a timer. Therefore, the automatic charger for cars allows charging different species:

• full
• fast
• restorative.

Once the automatic charger for the car will finish charging, he will hear sound signalAnd current flow will automatically stop.

Three ways to make a charger for the car do it yourself

How to charge a computer block

Old computers are not uncommon. Someone leaves them from the sense of nostalgia, others expect somewhere to apply good components somewhere. If your home has no old stationary computer, nothing terrible. Second-hand the power supply can be purchased for 200-300 rubles.

Power supplies from stationary computers are ideal for creating any chargers. As a controller, the TL494 chip is used here or similar to it KA7500.

The power of the power supply for the charger must be from 150 W and above. All wires from sources -5, -12, +5, +12 in fear. Also done with the resistor R1. It needs to be replaced with a rapid resistor. The value of the latter should be 27 ohms.

The scheme of the charger for the car from the power supply is extremely simple. Voltage from the tire with a markup in +12 V is transmitted to the upper output. At the same time, the conclusions 14 and 15 are simply cut due to their unobability.

Important! The only conclusion that must be left is the sixteenth. It adjoins the main wire. But at the same time it needs to be disabled.

On the rear wall of the power supply, you should set the R10 control potentiometer. You also need to skip two cords: one to connect terminals, another network. Additionally, you need to prepare a block of resistors. It will allow adjustment.

To make the above-described block you will need two toko-measuring resistors. It is best to use 5W8R2J. Power in 5 W is quite enough. The block resistance will be 0.1 Ohm, and the total power of 10 W.

For configuration, you will need a rapid resistor. He is attached to the same fee. Pre-removed part of the printed path. This will eliminate the possibility of communication of the hull and the main chain, and will also significantly increase the safety of the charger for the car.

Before as out of conclusions 1, 14-16, they must be pre-lit. Strategic thin wires are falling. Full charge is determined by voltage idle move. The standard interval is 13.8-14.2 V.

Complete charge is set by a variable resistor. It is important that the R10 potentiometer is in this middle position. Special clamps are installed to connect the terminals to the ends. It is best to use the type "crocodile".

Insulating tubes of clamps must be performed in different colors. Traditionally red - plus, blue - minus. But you can choose any moral colors. This is not fundamentally.

Important! If you confuse the wires, it will lead to a damage of the device.

In order to save time and money when assembling a charger for a car, you can exclude from the design of the Volt and ammeter. The initial current can be set using the R10 potentiometer. Recommended value of 5.5 and 6.5 A.

Adapter Charger

The best option To create a charger for the car there will be a 12-volt adapter. But when choosing a voltage, you first should consider the battery parameters.

The adapter wire must be trimmed from the end and talk. Approximately 5-7 centimeters for comfortable work will be enough. Wires with remote charges need to be laid at a distance of 40 centimeters from each other. At the end of each worn "crocodile".

Clamps in consistent manner are connected to the battery. Plus to the plus, minus to minus. After that, everything you need to do is turn on the adapter. This is one of the most simple schemes creating a charger for the car with your own hands.

Important! In the process of charging, you need to ensure that the battery does not overheat. If this happens the process must be immediately interrupted to avoid damage to the battery.

All ingenious simple or charger for a car from a light bulb and diode

All you need to create this charger can be found at home. The main element of the design will be the usual light bulb. In this case, its power should not be above 200 W.

Important! The more power, the faster the battery will be charged.

When charging, it is necessary to observe certain caution. Do not charge a 200-watt light bulb with a small capacity battery. Most likely it will lead to the fact that it will just boil. There is a simple calculation formula that will help you choose the optimal power of the bulb for your battery.

You will also need a semiconductor diode that will carry out electricity only in one direction. It can be made from the usual charge from the laptop. The final element of the design will be wire with terminals and plug.

It is very important when creating a charger for a car to follow safety rules. First, always turn off the scheme from the network before touching one of the elements of the hand. Secondly, all contacts must be carefully insulated. Talled wires should not be.

When assembling the circuit, all items are connected sequentially: lamp, diode, battery. It is important to know the polarity of the diode to connect everything correctly. For more security, use rubber gloves.

During the assembly of the scheme special attention Plug to the diode. It usually has a shooter that looks at the plus. Since he misses electricity only one way, it is extremely important. To check the polarity of the terminals, you can use the tester.

If you configure and connect everything correctly, the light bulb will burn in Polkanal. If there is no light, it means that you did something wrong or the battery is completely discharged.

The charging process itself takes about 6-8 hours.After this temporary interval, the charger for the car needs to be disconnected from the network to avoid overheating acb.

If you urgently need to recharge the battery process you can speed up. The main thing is that the diode is quite powerful. It will also be needed. All items are connected in one chain. The efficiency of this method of charging is only 1%, but the speed is several times higher.

RESULTS

The simplest charger for the car can be collected with your own hands in a few hours. At the same time, the set of desired materials can be found in every home. More complex devices require more time on their creation, but they have increased reliability and good level security.

Sooner or later, the car can stop starting due to low battery charge. Long exploitation leads to the fact that the generator is no longer able to charge the battery. In this case, it is necessary keep at hand at least the simplest charger for car battery.

Now a new generation of advanced models come to replace the usual transformer charging. Pulsed and automatic memory are very popular among them. We will get acquainted with the principle of their work, and those who already want to make - go

Pulse charges for acb

In contrast to the transformer, the pulsed charger for the car battery provides a complete charge. However, its main advantages are made in ease of use, significantly lower prices and compact size.

Battery charge with pulse devices is carried out in two stages: first at constancy of the voltage, and then when constant current(Often the charging process is automated). Basically, modern chargers consist of the same type, but very complex schemesTherefore, in case of their breakdown, the inexperienced owner is better to purchase a new one.

Acid - lead batteries are very sensitive to temperature. With hot weather, the battery charge level should not be below 50%, and in the conditions of harsh frost, not lower than 75%. Otherwise, the battery can stop working, so it will be necessary to recharge. The pulse device is very well suited for this and do not spoil the battery.

Automatic memory for car batteries

Inexperienced drivers are best suited for automatic charger. For a car battery. It has a number of features and protection that will free your poles on the incorrect connection of the poles and prohibit the supply of electrical current.

Some devices are designed to measure capacity and battery level, so they are used to charge batteries of any type.

Electrical circuits of automatic devices contain a special timer, thanks to which you can perform several different cycles: Full charging, fast recharging and recovery of the battery. After completing the process the device will inform about it and turn off the load.

Very often, due to improper operation of the battery on its plates, sulfitation is formed. The charge-discharge cycle not only eliminates the battery from the emerging salts, but also extends its service life.

Despite the low price of contemporary memory, the moments occur when the proper charging does not turn. therefore it is quite realistic to make a charger For the car battery do it yourself. Consider several examples of homemade devices.

Charging for battery from a computer power supply

Someone can stay old computers with a working unit of power, from which you can get a great charger. It will suit almost any Akb. Scheme of a simple charger from a computer power supply

Practically, each power supply in the DA1 place is worth the PWM - the controller on the TL494 chip or similar to it KA7500. For battery charge requires a current of 10% of the total battery capacity (Usually from 55 to 65a * h), so any BP with more than 150 W is able to work out it. Initially, you need to fall out unnecessary wires from sources -5 B, -12 in, +5 V, +12 V.

Next, it is necessary to fall out the resistor R1, which is replaced by a stroke resistor with the highest value of 27 com. Tire voltage +12 V will be transmitted to the upper output. Then 16 output is turned off from the main wire, and 14 and 15 are simply cut at the connection site.

Approximately this should be BP at the initial stage of alteration.

Now on the rear wall of the power supply unit, the current regulator R10 is installed, and 2 cords are passed: one network, another to connect to battery terminals. It is recommended to prepare a block of resistors in advance, with which the connection and adjustment is made much more convenient.

For its manufacture, two toko-measuring resistors 5W8R2J with a capacity of 5 watts are connected in parallel. Eventually the total power reaches 10 W, and the required resistance is 0.1 Ohm. To configure the charger to the same board, a rapid resistor is fixed. You must remove some part of the printed path. This will help exclude the possibility of adopting unwanted links between the device and the main chain. Pay attention to this for 2 reasons:

Electrical connections and a board with a resistor unit are set according to the above scheme.

Conclusions 1, 14, 15, 16 on the microcircuit first, it should be placed, and then falling stranded thin wires.

The full charge will be determined by the idling voltage ranging from 13, 8 to 14.2 V. It must be set to the variable resistor with the average position of the R10 potentiometer. To connect the conclusions to the terminals of the battery, the "crocodile" type clamps are installed on their ends. Insulating tubes on clips should be of different colors. Usually red corresponds to the "plus", and black - "minus". Do not be confused with the connection of wires, otherwise it will lead to a damage of the device.

Ultimately, the charger for the car battery from the computer's BP should look like this.

If the charger is applied solely to charge the battery, you can refuse a volt and ammeter. To set the initial current is enough to use the R10 potentiometer separated by the value of 5.5-6.5 A. Almost the entire process of charging does not require human intervention.

The charger of this type eliminates the possibility of overheating or recharging the battery.

The simplest memory using the adapter

As source direct current Here is the adapted 12-volt adapter. In this case, the charger circuit for the car battery does not need.

The main thing to take into account an important feature - the power supply voltage must be equal to the voltage of the battery itself.Otherwise, the battery will not charge.

The end of the adapter wire is clipped and taken up to 5 cm. Next, the wires with multi-dimensional charges are distant from each other by 40 cm. Then at the end of each wire dresses "crocodile" (Clamp type), each of which should differ in color to avoid confusion with polarity. The clamps are consistently connected to the battery ("from the plus to the plus", "from a minus to minus") and then include an adapter.

The complexity consists only in choosing the correct power source. It is also worth paying attention to the fact that in the process the battery can overheat. In this case, you need to interrupt charging for a while.

Xenon lamp One of the best light sources for cars. Find out what a fine for xenon before installing it.

Install Parktronic will be able to everyone. You can verify this on this page. Go and find out how to install parking sensors.

Many drivers have proven that the "Arrow" police radar does not forgive mistakes. Under this link /Tuning/elektronika/radar-detektor-protiv-strelki.html, you can find out which radar detectors will be able to protect the driver from fine.

Household Light Bulb Charger and Diode

To create a simple memory, you will need several simple items:

• household light bulb up to 200 W. The battery recharge rate depends on its power - the higher the faster;
• the mixture diode conducting electricity is only in one direction. As such a diode you can use a laptop charging;
• wires with terminals and plug.

Connection diagram of the elements and the process of charging the battery is clearly demonstrated on this video.

For proper setting Schemes The light bulb will burn in full, and if it is not completely lit, then it means you need to finalize the scheme. Perhaps the light bulb will not be lit in the case of a complete charge of the battery, which is unlikely (on terminals voltage is high, and the value of the current is small).

Charging takes about 10 hours, after which you will definitely disable the charger from the network, otherwise the battery overheating will lead to its failure.

In case of emergency, it is possible to recharge the battery using a sufficiently powerful diode and the heater by the current method from the network. The network connection sequence must be as follows: Diode, heater, battery. This method is due to a large amount of electricity, and efficiency is significantly small - 1%. This homemade charger for the car battery can be considered the easiest, but extremely unreliable.

Conclusion

To create the simplest charger that will not spoil your battery, a lot of technical knowledge will be required. FROM there is a wide choice of charging on the market. With a large functional and simple interface for work.

Therefore, if possible, it is better to have a reliable device with a guarantee that the rechargeable battery will not be at risk and will continue to be stable.

Take a look at this video. It shows another way to quickly charge the battery with his own hands.

The charger (memory) for the battery is necessary to each motorist, but it is worth it a lot, and regular preventive trips to the car service does not exit. Battery maintenance in a hundred requires time and money. In addition, on the discharged battery before the service still needs to be reached. Collect your own hands a workable charger for the car battery with their own hands will be able to everyone who knows how to use the soldering iron.

Little battery theory

Any battery (AKB) is an electrical energy drive. When the voltage is applied to it, the energy accumulates, thanks to chemical changes inside the battery. When the consumer is connected, the opposite process takes place: the reverse chemical change creates a voltage on the terminals of the device, the current flows through the load. Thus, to get a voltage from the battery, it first needs to be "put", i.e. to charge the battery.

Almost any car has its own generator, which, when the engine running, provides power supply to the on-board equipment and charges the battery, replete energy spent on the motor start. But in some cases (frequent or heavy launch of the engine, short trips, etc.) the battery energy does not have time to recover, the battery is gradually discharged. Exit from the created position one is charging an external charger.

How to find out the condition of the battery

To make a decision on the need for charging, you need to determine which state is the ACB. The easiest option is "twist / not twist" - at the same time is unsuccessful. If the battery "does not twist", for example, in the morning in the garage, then you will not go anywhere at all. The state "does not twist" is critical, and the consequences for the battery can be sad.

The optimal and reliable method of checking the state of the battery is the measurement of the voltage on it by the usual tester. At air temperature of about 20 degrees degree of charging degree On the terminals disconnected from the load (!) The battery is as follows:

• 12.6 ... 12.7 V - fully charged;
• 12.3 ... 12.4 in - 75%;
• 12.0 ... 12.1 B - 50%;
• 11.8 ... 11.9 in - 25%;
• 11.6 ... 11.7 V - discharged;
• below 11.6 V - deep discharge.

It should be noted that the voltage is 10.6 volts - critical. If it drops below, then the "car battery" (especially non-listening) fails.

Proper charging

There are two charging methods automotive battery - constant tension and constant current. Everyone has their own features and disadvantages:

Homemade charging for batteries

Collect your own hand charger for the car battery is real and not particularly difficult. To do this, you need to have initial knowledge of electrical engineering and be able to keep a soldering iron in your hands.

Simple device for 6 and 12 V

Such a scheme is the most elementary and budget. With this memory, you can qualitatively charge any lead battery With an operating voltage of 12 or 6 V and an electrical capacity from 10 to 120 a / h.

The device consists of a lowering transformer T1 and a powerful rectifier collected on diodes VD2-VD5. The charging current is made by the S2-S5 switches, with which the C1-C4 capacitors are connected to the transformer power supply circuit. Due to the multiple "weight" of each switch, various combinations allow stepwise to adjust the charging current in the range of 1-15 A with increments of 1 A. This is sufficient to select the optimal charging current.

For example, if a current of 5 A is required, then you will need to enable S4 and S2 tumbler. The closed S5, S3 and S2 will be given in the amount of 11 A. to control the voltage on the battery serves the PU1 voltmeter, followed by the charging current using the PA1 ammeter.

In the design you can use any power transformer with a capacity of about 300 W, including homemade. It should produce voltage 22-24 at the secondary winding at a current to 10-15 A.. In place VD2-VD5, any rectifier diodes, withstanding direct current of at least 10 A and the reverse voltage not lower than 40 V. are suitable for D214 or D242. They should be installed through insulating gaskets on the radiator with an area of \u200b\u200bscattering at least 300 cm.

C2-C5 capacitors must necessarily be non-polar paper with an operating voltage not lower than 300 V. Suitable, for example, MBCH, KBG-MN, MBGO, IBD, IBM, IBGC. Such capacitors having the shape of cubes were widely used as phase shifting for electromotors of household appliances. As PU1, a DC voltmeter of the M5-2 type with a measurement limit of 30 V. PA1 is an ammeter of the same type with a measurement limit of 30 A.

The scheme is simple, if you collect it out of serviceable parts, it does not need it in establishing. This device is suitable for charging scest batteries, but the "weight" of each of the S2-S5 switches will be different. Therefore, to navigate in the charging currents will have to ammeter.

With smooth adjustment current

According to this scheme, collect the charger for the battery of the car with your own hands is more difficult, but it is possible in repetition and also does not contain scarce details. With it, it is permissible to charge 12-volt batteries with a capacity of up to 120 a / h, the charge current is smoothly adjustable.

Charging the battery is performed by a pulse current, a thyristor is used as an adjusting element. In addition to the smooth adjustment knob, this design has a mode switch, when the charging current is turned on twice.

Charging mode is monitored visually by the direction of RA1. R1 resistor homemade, made of nichrome or copper wire with a diameter of at least 0.8 mm. It serves as a current limiter. Lamp EL1 - indicator. In its place, any small-sized indicator lamp with a voltage of 24-36 V.

A lowering transformer can be applied with an output voltage along the secondary winding 18-24 at a current to 15 A. If the appropriate device did not turn out at hand, it can be done from any network transformer with a power of 250-300 W. To do this, with a transformer, all windings are clarified, except for the network, and wind one secondary winding with any insulated wire with a cross section of 6 mm. sq. The number of turns in the winding is 42.

Thyristor VD2 can be any of the KU202 series with letters inn. It is installed on the radiator with an area of \u200b\u200bdissipation of at least 200 cm. Power installation of the device is made by wires of minimal length and with a cross section of at least 4 mm. sq. In place VD1, any rectifying diode with a reverse voltage is not lower than 20 V and withstand current of at least 200 mA.

The device is established to calibrate the ammeter RA1. You can do this by connecting several 12 volt lamps instead of the battery total capacity Up to 250 watts, controlling the current on an obviously serviceable reference ammeter.

From a computer unit

To assemble this simple charger with your own hands, you will need a regular power supply from the old ATH computer and knowledge of radio engineering. But but the characteristics of the device will be decent. With it, they charge the battery to 10 A, adjusting the current and the charge voltage. The only condition - the BP is desirable on the TL494 controller.

For creating automotive charging do it yourself from the power supply of the computer We will have to collect the scheme shown in the figure.

Step-by-step necessary for the revision of the operation Will look like this:

1. Bite all the wires of the power tires, with the exception of yellow and black.
2. To combine the yellow and separate black wires among themselves - it will be, respectively, "+" and "-" memory (see scheme).
3. Out all the tracks leading to the conclusions 1, 14, 15 and 16 of the TL494 controller.
4. Install the variables of the resistors with a nominal value of 10 and 4.4 kΩ on the cover of BP - these are the voltage adjustment organs and charging current, respectively.
5. Attachment to assemble the scheme shown in the figure above.

If the installation is performed correctly, then the improvement is completed. It remains to equip a new voice with a voltmeter, an ammeter and wires with "crocodiles" to connect to the battery.

In the design it is possible to use any variables and permanent resistors, in addition to the current (bottom according to the scheme with a face value of 0.1 Ohm). Its dissipated power is at least 10 W. You can make this resistor yourself from the nichrome or copper wire of the appropriate length, but really find and ready, for example, the shunt from the Chinese digital tester by 10 A or the C5-16MV resistor. Another option is two 5WR2J resistors turned on in parallel. Such resistors are in pulsed power supplies PC or TVs.

What you need to know when charging the battery

Chargeing a car battery, it is important to observe a number of rules. It will help you extend battery life and save your health:

The question of creating a simple charger for the battery with your own hands is clarified. Everything is simple enough, it remains to stock necessary tool And you can safely begin work.