The weakest point in household screwdrivers is the battery. Like any galvanic element, it has its own service life. The battery for a screwdriver lasts on average 3–4 years, no more, and then must be disposed of. By the way, claims that with proper care and maintenance it will last 10 years are clearly exaggerated.

How to give a screwdriver a second life if the battery has failed?

Switching power supply for 18 V screwdriver: diagram

There is a way out, and there is more than one. You can purchase a new battery. But the price of such a device may exceed the cost of the entire instrument purchased several years ago. Therefore, the most acceptable solution would be to convert the screwdriver to mains voltage.

Options for connecting a screwdriver to a 220 V network

One solution would be to create a power supply yourself. There are many options for creating a homemade power supply:

• universal option;
• with a two-pole resistor;
• with three-pole resistor;
• with amplifier;
• with and without zener diode;
• on one filter.

Component elements of the switching power supply circuit

Making a switching power supply for an 18 V hand tool with your own hands is not at all difficult. For this you will need:

1. Output capacitor 5 pF.
2. Resistor.
3. Integrated negative directivity converter.
4. Comparator with two or three plates.
5. Low resistance rectifier.
6. Channel filters with beam adapters.
7. Schematic diagram of a switching power supply.

Connecting a cordless screwdriver to a 220 V network: AC adapter

The electric drive of the screwdriver can be driven from a 220 V network by a network adapter. It can be purchased ready-made - the price allows it. You can do it yourself. The purchased adapter must be inserted into the battery housing of the screwdriver, having first removed the batteries. The only drawback is the short length of the cord.

DIY power adapter for a screwdriver: materials

If you need to make a power adapter yourself, then a laptop charger is ideal for this.

The process of converting a cordless screwdriver into a corded one is simple and does not take much time. To do this you need to have:

1. Laptop charger.
2. Screwdriver with used battery.
3. Electrical wire.
4. Electrical tape.
5. Soldering iron and solder.
6. Acid.

Do-it-yourself power adapter for a screwdriver: step-by-step instructions

The rework process includes the following steps:

• First you need to measure the output voltage on the device. It should be 19 V.
• After this you need to take the battery and disassemble it. If it is twisted with screws, then simply unscrew them; if it is glued, then you must first tap it with a rubber hammer. Clean the housing from dirt and prepare it for further work by drilling a hole in it for the power cable.
• Now you need to cut off the connector and strip the wires of insulation.
• The battery should not be thrown away immediately. It can serve as a counterweight for some time. The center of gravity of the screwdriver is shifted and is located in the area of ​​the handle. When the galvanic elements are removed, its location will change, and it will be inconvenient to work with the tool.
• You need to connect an extended cable from the laptop charging to the wires coming from the battery terminals. It must first be passed through a prepared hole in the housing. The cable can be soldered or twisted and insulated with electrical tape.
• When everything is ready, you need to put everything in the case and check the polarity. After this, test the screwdriver.

Power supply for 18 V cordless screwdriver based on an electronic transformer

Another solution for converting a cordless screwdriver to a 220 V network is to use an electronic transformer.

Materials for assembling a transformer power supply

To do this you need the following details:

1. Electronic transformer TOSHIBA 105 W or Kamelion 200–250 W. The latter device additionally has short circuit protection.
2. Ultrafast diodes KD213 or KD 2999, KD 2997 for 10 A, 4 pcs.
3. Choke from a computer power supply.
4. Electrolytic capacitor 2200 mF at 25 V.
5. 220 nF film capacitor at 25 V.
6. Load resistor 1–2 kOhm.

Procedure for assembling a transformer power supply

• The process begins with the modification of the electronic transformer. 4 turns must be added to the secondary winding.
• After this, you can assemble the diode bridge. The circuit assembly is carried out by surface mounting or everything is placed on a printed circuit board.
• Then you need to install a choke in the circuit. A 2200 mF capacitor at 25 V is soldered behind it. This is the optimal capacitance of the device. Neither more nor less is needed.
• A film capacitor must be installed in parallel with the electrolyte. It is needed to ensure that high-frequency residues do not damage the main capacitor, but pass through the film capacitor.
• A load resistor must be installed at the output. It will provide the same voltage value, regardless of the load, and will prevent the failure of capacitors.
• After this, a capacitor must be installed in the electronic transformer to enable starting without load.
• The first time you need to turn on the power supply to the network using a 40 W test light. This is necessary to prevent a short circuit that may have occurred during rewinding of the transformer or assembly. If the lamp does not light up, then everything was done correctly.
• After this, you need to remove the control and check the block under load by connecting it to a screwdriver.
• The resulting unit can be placed in the tool's battery housing.

The reader, having familiarized himself with the information presented in this article, can give his screwdriver a second life. To do this, it is enough to choose the most acceptable method of converting a battery tool for a 220 V network.

A screwdriver is a tool designed for tightening screws and drilling small-diameter holes. There are mains ones, powered by 220V mains, and rechargeable ones, with two replaceable batteries.

If the battery in such devices fails, there are three options:

• replacing the battery is expensive; in a budget-class device, the price of the kit is close to the cost of a new device;
• repair is not always possible, and in some cases its cost is comparable to the cost of new batteries;
• Converting a cordless screwdriver to a corded one.

This article talks about how to power a screwdriver from a 220V network, or how to turn a cordless screwdriver into a network one.

Screwdriver device

This mechanism consists of the following parts:

• DC motor. It has the shape of a cylinder; instead of an excitation winding, the housing contains permanent magnets. This simplifies the design and provides sufficient torque at low speeds. The drive (sun) gear of the planetary gearbox is mounted on the electric motor shaft;
• Reversible speed controller. The adjustment circuit is assembled on a PWM controller and a field-effect transistor. Reversing is carried out by switching the polarity of the power connection to the motor brushes;
• Planetary reductor. Made in a separate building. It got its name because of its resemblance to the solar system. Consists of a ring gear, a central (sun) gear, satellites and a carrier. The ring gear transmits force through the spring-loaded balls of the load regulator. There are models with two-speed gearboxes. Increased speed is activated when using the device as a drill;
• Rotation force limitation mechanism. Serves to limit the force when tightening screws. Transmits torque through balls pressed by an adjustable spring;
• Removable battery. Consists of individual elements in one housing. The voltage in different models ranges from 9 to 18 volts.

Screwdriver battery design

The design of the battery does not depend on the brand. In all devices, the battery design is similar and differs in appearance, housing and contacts.

The housing contains several elements connected in series. Their number depends on the voltage of each element and the battery as a whole. When using the most common nickel-cadmium elements with a voltage of 1.2V, 10 pcs are needed to power a device with a nominal value of 12V. Battery capacity is indicated in ampere hours.

Interesting. With a series connection, the output voltage increases, but the capacitance does not change and is equal to the capacitance of the individual elements.

Types of battery cells

These devices use elements of different types and voltages, each of which has its own advantages and disadvantages.

The most common are nickel-cadmium (Ni – Cd) with a voltage of 1.2V.

Advantages:

• low price;
• stored in a discharged state.

Flaws:

• have a memory effect;
• high self-discharge;
• small capacity;
• small number of charge/discharge cycles.

More advanced nickel-metal hydride (Ni-MH) voltages are 1.2V.

Advantages:

• less memory effect and self-discharge;
• large capacity and number of charge/discharge cycles.

Flaws:

• higher price;
• do not tolerate low temperatures and storage in a discharged state.

The most advanced lithium-ion (Li-Ion) voltage 3.6V.

Advantages:

• no memory effect;
• very low self-discharge current;
• high specific capacity, allowing to reduce the weight and dimensions of the device;
• the number of charge/discharge cycles is many times higher than other types of batteries.

Flaws:

• high price;
• loss of capacity three years after manufacture.

Converting a screwdriver to power from a 220V network

If the battery fails and it cannot be repaired, the only way out is to convert the cordless screwdriver into a mains one.

In this case, the power of the power supply must exceed the power of the engine, taking into account possible overloads at the moment of completion of tightening. It is not indicated in the device passport, but this parameter is written on the body of the electric motor, or it can be calculated by connecting the device to a constant voltage source through an ammeter. For a 70W motor, a 120W power supply is sufficient.

Important! The charger's power is insufficient to operate it. When converting a cordless screwdriver into a mains-powered one for 220 volts, you must use a different power supply.

Using an external power supply

The external power supply device is larger in size than the built-in one, but in any case, if you power the screwdriver from the mains, the tool will be “tied” to the socket by a wire.

The current coming from the power supply reaches 10-15A, so the cable cross-section must be at least 1mm².

Interesting. The screwdriver can be powered from an old car battery or from a car through the cigarette lighter socket.

Computer power supply

The simplest and cheapest option is to use a power supply from an old computer with a power of at least 300W and a current of 15A.

In old units there was a switch, in modern ones - to turn it on you need to short-circuit the wires going to the device. The color of these wires depends on the model. This can be found on the Internet or by selection.

The 12V output is located in a four-pin connector: black “–”, yellow “+”.

Such devices have a built-in fan, so when making a housing for it, it is necessary to make holes or install it with the fan facing outward. It's best to simply hide the excess wires inside the case.

Important! A 14.4 or 18 volt screwdriver will operate at reduced power.

Car battery charger

The requirements for this device are the same as when using a computer unit.

If so, it is advisable to use a device with a built-in voltmeter and voltage regulation. Some models have a current-limiting resistor installed inside. It needs to be short-circuited.

How to make a homemade power supply

In addition to the purchased one, you can make your own power supply. To do this, you need a 160W transformer, the kind that was installed in tube TVs.

First of all, it is necessary to determine the required number of turns. The procedure is as follows:

• disassemble the transformer;
• unwind all secondary windings from the reel;
• wind 10 turns of wire;
• assemble a transformer;
• connect to 220V network;
• measure the voltage on the secondary winding;
• divide the number of turns (in this case 10) by the measured voltage.

The resulting value is multiplied by the supply voltage of the screwdriver and the required number of turns is obtained.

Attention! The number of turns per volt can be obtained by measuring the voltage and counting the turns in the secondary winding.

The step-down winding is wound with a wire with a cross-section of 1 mm² to reduce the voltage drop in the transformer.

The output of the transformer is alternating voltage, but the device requires constant voltage, so a diode bridge is installed in addition to the transformer. It is assembled from diodes on radiators with a voltage of more than 20V and a current of 10A. It is mounted together with a transformer or in a battery case from which the elements have been removed.

Built-in battery power supply in case

If you have the desire, time and “direct” hands, the unit can be placed in the battery case. To do this, a ready-made device with the appropriate parameters is purchased, removed from its housing and mounted in the battery housing. The terminals are soldered with a wire with a cross-section of at least 1 mm² to the battery terminals, and the power cord is replaced with a longer one.

Important! If there were ventilation holes in the power supply case, then it is necessary to make similar ones in the new design.

Assembling a working battery from two that have lost capacity

From two faulty devices you can assemble one that is suitable for use.

Important! By connecting a power supply to the body of the faulty battery, a second repaired one will provide mobility when performing small amounts of work.

Finding faulty elements

The battery is assembled from individual elements. They do not fail at the same time, but even one faulty element impairs the performance of the entire battery.

To determine the parts that have lost capacity, you must:

• charge the battery;
• work until power loss;
• disassemble the battery;
• measure the voltage on each element separately.

Batteries on which the voltage is noticeably less than others or absent altogether must be replaced.

Battery repair

After identifying and removing the faulty parts, the remaining parts are assembled into a device suitable for further use. The connection is made by soldering, wires with a cross-section of 1.5 mm² or a strip similar to the one with which the parts were connected before.

If there is an insufficient number of serviceable elements, we purchase the missing ones or convert the instrument to a 220-volt mains power supply.

Knowing how to convert a cordless screwdriver into a corded one with your own hands will help you save money and not have to purchase a new device.

Video

Self-powered screwdrivers from a 12V battery are a very popular tool on production lines and at the household level. Its advantage is considered to be that it is not connected to the electrical outlet; it is very convenient to carry out work on drilling and fastening screws. As a disadvantage, we can note the high cost of rechargeable batteries and their relatively short service life - from 3-5 years, with intensive work it can be even shorter. Therefore, many people think about how to make a power supply for a screwdriver with their own hands. When purchasing and replacing batteries, financial costs can range from 50 to 80% of the original cost of a new screwdriver. Given their financial capabilities and needs, many consumers are looking for a more economical way to continue using old screwdrivers. One of these ways is to remake its power circuit for a 220V outlet network.

How to convert a cordless screwdriver into a corded one

Let's look at the two most accessible ways to remake a screwdriver with 12V DC power with your own hands quickly and with minimal financial costs:

• Use the original charger of the screwdriver;
• Use the power supply for the screwdriver from the PC system unit.

There are other methods of alteration, but they require more practical skills and knowledge in electrical engineering; these are accessible even to amateurs.

Using a screwdriver charger

This is the simplest and least expensive method, except for the cost of electricity and solder when soldering contacts.

Sequencing:

• The screws securing the charger housing are unscrewed and the top cover is removed;
• The conductive wires of the power cord are soldered to the output contacts of the charger. The wires must be flexible, stranded, with a cross-section of at least 2.5-4 mm2 in order to withstand current loads during operation, the cord length is 3-4 m;

• You can solder wires to the output terminals of the charger, to which the contacts of the battery pack are connected when you install it for charging. This method has certain difficulties - the terminals are made of brass alloy, and copper wires cannot be soldered to them with ordinary solder;
• It is necessary to clean the soldering area with a file or sandpaper until the metal appears yellowish;
• Warm up the terminal well with a 40-60 W soldering iron, lubricate it with a special paste (solders for soldering non-ferrous metals are sold in radio parts stores), then the tin solder will reliably adhere to the brass;

• After the soldering points are ready, you can solder tinned copper wire ends to them, with red insulation for +, with blue or black insulation for minus;

This entire procedure can be avoided if you remove the terminals from the board and solder wires to the board in their place. You can remove the power cord from the charger output through the holes in the case where the charging contacts were located, or make an additional hole commensurate with the diameter of the power cord.

Some people are confused by the third contact at the output of the charger; you only need to use two: “+12V” and “-12V”. The polarities of the contacts are indicated on the case or on the board; for reliability, you can plug the charger into a socket and use a multimeter to check the presence of 12 V DC voltage at the output and the polarity of the contacts. The remaining contact is for the sensor for automatic control, disconnecting and connecting charging; when the battery reaches its full charge level, the sensor turns off the charger. In our case, this function is not needed; the terminal can be left or cut off from the board. If you are going to use this charger for its intended purpose, then you do not need to remove the terminals; solder the wires from the bottom side of the board to the conductive tracks.

• After soldering the wires, the cord is brought out and the charger case is closed. The opposite end of the cord is stripped, the copper conductors are tinned with solder.

The next stage of work is preparing the input power contacts on the screwdriver itself:

• Remove the battery container from the screwdriver handle;
• Open it and remove the battery cells;

• We drill a hole in the body of the battery container for the power cord;
• We solder the ends of the wire coming from the charger output to the contacts in the battery container from the inside, observing the polarities;
• The terminals on the container are also brass alloy, so strip and use brass solder if necessary;
• Secure the wire inside the container to the wall of the case so that it does not come off when pulled. This can be done with a flexible plastic plate, screwing it to the body inside the compartment with two screws. Lay the power cord under the plate, so it will be securely pressed from the inside;

Important! Do not use metal plates as clamps to secure the wire in the charger and on the screwdriver, or use a dielectric spacer (plastic, rubber, cardboard or other insulating material) between the wire and the plate. Otherwise, the metal plate may crush the cord and cut through the insulation layer, resulting in a short circuit.

• The battery container is closed and installed in the screwdriver handle;
• The charger is plugged into the outlet; if everything is done correctly, the screwdriver will function.

It should be noted that if the polarities are reversed, no disaster will occur; the screwdriver chuck will rotate counterclockwise, in the direction of unscrewing. But each product has a reverse switch, so in order not to solder the contacts, just switch the rotation in the other direction. It is recommended to observe polarities in order not to mislead users, and rotation was carried out in the direction in which the arrows near the switch point.

Using a power supply from a PC system unit

This method is used if there is no original charger for the screwdriver, or it is faulty and cannot be restored.

We are considering a switching power supply LC 300-ATX P4, the output of which is three types of DC voltage: +3.3V; +5V and +12V. The 12 volt line can withstand loads up to 15A, this is a power of up to 180W. This is no less than what batteries provide, but, as practice shows, it is quite enough to screw screws into dense wood.

Sequence of operations during rework:

• The power supply is removed from the old PC system unit; to do this, you need to disconnect all the buses with connectors going from it to other boards, and unscrew its case;

• The cover of the metal case is opened;
• Connectors with wires are bitten off at a distance of 15-20 cm from the board;

Important! Do not cut the wires going from the board to the fan - there will be no cooling, and the power supply will quickly fail.

• On all power supply models of this series, the colors of the wires are soldered according to the standards, black - body, yellow +12V, orange + 3.3V, red +5V;
• We connect the green wire for turning on the power supply to the case (black wire) through the switch;

• It should be noted that a switching power supply works effectively when all its outputs are under load, so you can solder a light bulb, black and red wires, even a 12 V car one to the +5V output. It will not glow brightly, this is not required, the main thing is that the chain was under load. We do the same with the 3.3V line - solder an orange and black wire to a 5-10V lamp. One of these lamps can be displayed on the front panel as an indicator that the power supply is turned on and power is supplied;

• Using a screwdriver, we run the black wire to the negative in the battery compartment and connect the yellow wire to the positive. Removal of galvanic cans from the battery compartment and soldering of wires is carried out according to the method described earlier;

• The remaining excess wires can be bitten off or, for reliability, run parallel in one line;
• After connecting all the wires, turn on the power supply; if everything is done correctly, the screwdriver will work.

It should be noted that there are other ways to assemble power supplies on a transformer that deliver a full power of 300-400W. In our case, we considered options that did not require capital investment and great knowledge. In other cases, when you make a power supply for an 18V screwdriver with your own hands, a power supply for a 12V screwdriver from a PC will not work. It is possible to increase the voltage to 18 volts with certain modifications, but this requires detailed consideration in a separate article; other options, knowledge of electrical engineering and practical skills will be required.

Video

A wonderful household assistant is a cordless screwdriver. This tool will be with you everywhere, but it works exactly until the battery runs out, but the number of charge cycles is limited, even from idleness the battery can deteriorate. The batteries last about three years, and after this time you will have to replace it. You can save a tool if you convert it from a battery to a mains one, and there are various ways to do this.

Why remake a cordless screwdriver?

Why remake a screwdriver? When does such a need arise? If you are reading this article, you have probably already appreciated all the convenience of this tool. Without unnecessary wiring and at any time, you can use it even in the most inaccessible places, until the battery runs out. This is the first drawback of the screwdriver. The cheaper the tool, the faster its battery will exhaust its charging cycles. Here is the second drawback. And you must understand that the manufacturer saves just as much as you do, and there is nothing unusual about it. Buying a new battery in terms of costs is practically no different from buying a screwdriver, but there is a way out, and now we will look at options for converting a screwdriver from battery to mains power.

There are several ways to convert a screwdriver from a cordless one to a mains one:

• using a laptop charger;
• using a PC power supply;
• using a car battery;
• using a power supply from halogen lamps;
• using a Chinese 24V power supply board.

How to convert a cordless screwdriver to work on a 220 volt network?

Methods for converting a cordless screwdriver to work on mains power vary in complexity. Connecting charging from a laptop requires almost no knowledge; to install a computer power supply you need to be familiar with a soldering iron, and to reconfigure a Chinese unit, a master must be able to handle measuring instruments.

Using a laptop charger

This method requires minimal technical knowledge from you. If there is a need to convert a screwdriver into a network one, an unnecessary laptop charger can help you, since it has similar characteristics and can easily be found in any home. First you need to look at the output voltage of the charger. 12-19V chargers are suitable.

The battery pack will need to be modified; to do this, you need to disassemble it and remove the failed batteries.

1. Take a laptop charger.
2. Cut off the connector and strip the wires of insulation.
3. Take the bare wires and solder them. If this is not possible, tape them with electrical tape.
4. Make a hole in the body for the wire and assemble the structure.

Using an external power supply from the computer

So, you will need an AT format power supply. It is likely that you will find it at home, but you can easily purchase an old working power supply at any radio market. Its cost is unlikely to be high. It is very important to remember that a power supply with a power of 300–350 W and a current in a 12 V circuit of at least 16 A is suitable.

In this regard, the same “AT” format power supply, which is located in the case of any desktop computer, is good because the power is always honestly indicated on it. Such power supplies always have a power button, as well as a fan for cooling, and an overload protection system.

The modification steps are as follows:

1. Unscrew the power supply housing. Under the case you will see a fan, a board and many wires that go from the board to the connectors.
2. It is necessary to remove the power-on protection. To do this, you need to find the green wire on the large square connector.
3. Connect the green wire to any black wire from the same connector. For convenience, you can cut it shorter and leave it inside the case. Alternatively, you can use a jumper made from a small piece of wire.

1. Cut off unnecessary wires, leaving yellow and black.
2. Using a piece of wire as an extension cord so that the power supply can be in a convenient place during operation, solder it to the yellow and black wires
3. We attach the other end of the wire to the terminals of the empty battery compartment, as in the previous instructions.

Video: how to convert a screwdriver to work from the network

Using a car battery

The principle of such a modification is no different from the method using charging from a laptop. Thanks to the current trends towards compact pulse charging, linear analog devices with manual control can be purchased on the car market at a very attractive price.

If the voltage on the battery changes smoothly, then it will fit absolutely any screwdriver, and the modification of such a tool is carried out as follows:

Taking a Chinese power supply board

So, we are talking about a power supply with an output voltage of 24 V and a maximum current of 9 A. Screwdrivers are usually designed for a voltage of 12 V or 18 V, so you will first have to lower the voltage to an acceptable level.

To change the output voltage, you need to make modifications to the feedback circuit. The resistor under position R10 is responsible for the output voltage. Its nominal value is 2320 Ohm. Instead of this resistor, we will install a trimming resistor, thus it will be possible to change the output voltage of the power supply to suit our needs, the value of the trimming resistor is 10 kOhm.

1. Remove the permanent resistor.
2. Before installing the trimmer resistor, it is recommended to set its resistance to approximately 2300 Ohms. This is done so that the output voltage of the power supply is approximately 24 volts, and the power supply does not go into protection against excessively high or low output voltage.
3. Solder in a trim resistor.
4. Turn on the power supply and adjust the voltage by rotating the adjusting screw. After changing the output voltage, check the characteristics of the power supply: maximum output current and power. At a current greater than 7.6 A, the power supply goes into overload and sharply reduces the output voltage.
5. Check what happens at a voltage of 12 V. Adjust the output voltage. The maximum output current is more than 9A, excellent!

If the battery is faulty: how to make an adapter for a screwdriver?

There are two ways to make an adapter: use an old battery pack, because it already has a connector that fits a screwdriver, or connect the wires directly to the handle.

Connecting the old battery pack

Connecting the old unit is done as follows:

1. First you need to disassemble the battery pack; to do this, unscrew the screws as shown in the figure.
2. Remove used nickel-cadmium batteries.
3. Next, separate them from the connector contacts.
4. After this, use a soldering iron to solder the wires to the contact plates. If you don’t have it at hand, just tape the wires to the contacts, after which you can start assembling.
5. Place the plastic latch along with the wires into the connector of the battery pack, make a hole from the inside for the wire - you can use wire cutters or a drill for this.
6. Pull the wire through the hole and screw the screws into place.

Connecting wires directly

Connecting wires directly to a screwdriver is done as follows:

1. To connect the wires directly, you first need to disassemble the screwdriver, that is, unscrew the bolts holding the two halves of the case together.
2. Examine the connections, find the plus and minus, remember the polarity of the connection. For convenience, it was decided to remove the lower wide part of the handle.
3. Next you need to connect the wires, this can be done using a soldering iron or good old electrical tape.
4. The main thing is to insulate everything well, wrap it so that no metal parts protrude, then wrap it again so that the terminals do not touch. You can start assembling.
5. Reassemble the housing by repeating the disassembly steps in reverse order.
6. And the final touch is to wrap the wires at the exit of the handle for additional fixation and insulation.

Congratulations! Now that you have learned how to convert a screwdriver into a network one, you can put this knowledge into practice. And it doesn’t matter whether your screwdriver is charged or not. You don't have to worry about how long the battery will last. Good luck with your remodel!

Any home cannot do without a home assistant, which is a screwdriver. This is an electrical device with which you can not only screw screws, but also drill holes.

The main advantage of such a device is its mobility, which is provided by a 12-volt battery. There are also more powerful versions of screwdrivers, the battery of which has a constant voltage of 18 Volts.

If the device is not used for a long time, the battery will spontaneously discharge, which is a negative factor. When the battery becomes unusable, the screwdriver becomes useless, so we’ll find out how you can convert a screwdriver to be powered from a 220-volt network with your own hands.

Although a tool such as a screwdriver is the most popular, not every home craftsman uses it every day. Every day the battery is subject to spontaneous discharge, as a result of which the internal structure of the product is destroyed.

After the battery does not last for several minutes, the question arises, what to do with the screwdriver now? You can buy a new battery, but first you need to find it, because you can only find the exact design of the power element from official dealers. The second option is to throw away the screwdriver and buy a new one, the cost of which is at least 2-3 thousand rubles (this is an average quality product). The third option is the simplest, but at the same time it requires effort - to convert the product to be powered by alternating voltage.

The advantages of the latter option are the following factors:

• There is no need to constantly recharge the battery, which is very annoying during the work process;
• Now the screwdriver can be stored as long as you like, without thinking that the battery spontaneously discharges every day;
• Constant torque, which will provide voltage from the mains.

Among all the advantages, there will be only one drawback, which is due to the need to connect the device to an outlet, so the product must be connected to the electrical network during operation.

Required materials and tools

For most, the third option may seem difficult, because it is much easier to buy a new device and use it for several more years. In fact, the old screwdriver will last even longer, but for this it is necessary to restore it. This is quite simple to do, and you will need the following tools and materials:

1. A charger that previously played an important role in charging the battery.
2. Multicore electrical cable.
3. A battery from a screwdriver that has become unusable.

Tools you will need are a soldering iron, acid, solder and insulating tape.

All these details will allow you to transform the screwdriver so that it can be connected to a 220 Volt network.

Where to start work

Important! During soldering, it is important to control the polarity, but if it is not observed, then nothing terrible will happen, only the device will function in the other direction. But with the help of a switch this situation can be easily resolved.

The electrical cable is inserted into the battery from the outside, making a special hole in the structure of the required diameter. After this, it is important to ensure that the cable is securely fixed in the battery housing structure. For this, you just need insulating tape, with which you should wrap the cable inside and outside, thereby making a lock. After this, insert the battery case into the screwdriver and use it for its intended purpose.

Options on how to do it + (Video)

If the power supply has also become unusable, then do not be upset, since there are other options for how to power the screwdriver:

1. PC power supply

The power supply for the screwdriver can be provided by a PC unit, which is much easier to find than a new battery for the device. The advantage of a PC power supply is the fact that it is possible to obtain different current values ​​at the output, which is considered very important.

The design of the PC power supply includes a cooler that provides cooling for the transformer and its component elements, so you can immediately note that this type of power supply is durable, and in the next few years you will forget about problems with a screwdriver.

2. Old inverter welding

You can power a screwdriver using an old inverter welding machine, but this will require some knowledge of electrical engineering theory. After all, in this case it is necessary to add a secondary coil of the transformer, which will make it possible to obtain at the output a completely suitable current for powering the electric motor of the device. Therefore, before connecting the screwdriver to the welding machine, it is necessary to measure the current and voltage at the output, which must correspond to the values ​​of the device.

3. Car battery

The last option is a car battery that can be connected to a screwdriver and used in places where it is impossible to get 220 Volt power. The disadvantage of such a device is that you won’t be able to work with a screwdriver for a long time, since the car’s power source quickly discharges. Therefore, if the standard UPS of a screwdriver refuses to function, which happens very often, then there is no need to rush to get rid of the device; just spend a few hours and the device will work even better than with a battery.

Precautionary measures

After remaking a screwdriver, it is important to adhere to the following precautions:

• Provide rest for the device every 20 minutes of operation, which will extend its service life;
• Do not operate the device at a height of more than 2 meters from the ground;
• Periodically clean the power supply from dust;
• Make sure that the electrical cable during operation is not pinched, strained or exposed to negative factors, which can lead to the creation of a short circuit current.

After the alteration, following the safety rules, the old screwdriver will last longer than the new two.