How to fix charging from a screwdriver. Alignment of potentials

Is it possible to connect a screwdriver directly to the charging

The screwdriver is convenient for its ubiquity. Independence from limiting wires makes it possible to make its way into the hard.To.Use areas. A set of two power modules allows you to nourish one of them while working with another. However, each battery block has a final number of charging/discharge periods, failing after their spent. In the tools of inexpensive cost, the blocks break faster, and the user receives a gadget with a working motor, but without power. Then there is a dilemma “Can you connect a screwdriver directly to the charging“.

You can nourish such a screwdriver by connecting it to the network through the power supply unit, because its motor operates at 220 volts.

We revive the nickel-cadmium battery

The screwdrivers equipped with nickel-cadmium batteries have practically the past. But they are still sold, found and even work, since the Ni-CD elements can “live” up to 20-25 years, although they withstand about 900 “charge/discharge” cycles. Another feature of nickel-cadmium batteries-they can be stored in a discharged state. So if you found a grandfather’s screwdriver with a Ni-CD battery in the attic, then it makes sense to try to revive it.

We will try to charge the battery. Any burden capable of providing the desired voltage and current equal to half the battery capacity is suitable.

We turn on, try to charge. If the battery takes charging, then we continue. If there is no half.Zero on it, we move on to the plan “g” and “p” (see. Below).

As soon as the voltage on the battery reaches the value of 1.37 V, multiplied by the number of batteries, we stop the process. But that’s not all. Not the fact that the battery is fully charged. Nickel-cadmium batteries suffer from the so-called memory effect. If they were constantly discharged, say, up to 60%, and then put them on charging, then they will get used to it and then they will refuse to work when discharge for all the same 60%. Therefore, we discharge our battery with approximately the same current as they charged. We discharge to a value of 1 V, multiplied by the number of batteries. As a load, you can use car lamps or a screwdriver itself.

After that, we are completely charged again. Repeat the operation “charge/discharge” 3-4 times. We fully charge and try to use a screwdriver. If even after all these manipulations, the battery capacity is significantly lower than the declared, then, unfortunately, in our hands a decrepit, outdoor old man. He cannot be resuscitation.

Plan “w”, pushing

Plan “g” consists in the “pushing” of the battery in short (0.2-0.3 sec) high current pulses. Over, the current should be much (ten times) more than the battery capacity. “Pushing” is better each battery separately. Therefore, we open the battery, find out where each battery has plus and minus. As a pusher, we will use a car battery, but any other powerful source with a voltage of 10-15 V is suitable.

We connect the minus of our element to the minus of the “pusher”, connect one end of the wire to the plus of the “pusher”, and the second end we briefly touch the plus output of the Ni-CD element. Frequency of touches-2-3 per second. As a result of such a burning, dendrites causing microsyps are eliminated, and the battery comes to life.

The operation is carried out within 5-6 seconds. We put it on charging. If the process has gone, we eliminate the effect of memory (see. Higher). Try to use.

Plan “P”, Dolnia

This plan is effective in the degradation of electrolyte, because during operation there is a process of oxidation with water consumption. And the plan is:

  • Microdrel make a hole in the housing.
  • Pour 1 cube of distilled water into the hole with a syringe.
  • We are waiting for an hour, then “pushing” the element with high current pulses.
  • We put it on charging. We are waiting for a day, measure the voltage.
  • If the voltage is normal, seal the hole with a sealant or soldering.
  • If it fell or the element did not want to take exercises, go to paragraph 2 and do so until there is nowhere to pour water.

If it did not help, then you can read the articles “How to redo the battery screwdriver for 12 or 18 V in the network with your own hands” and “How to make a power supply for a screwdriver”. Still better than throwing a working tool again into the attic.

We found out how to charge a screwdriver battery without a native “charging”. Now, even if the “charger” of your screwdriver burned, drowned, lost or stolen, you will find a way out.

What can break

There are a number of “typical” breakdowns inherent in battery screws. Their list contains a fuse, a diode bridge, a capacitor and a high.Voltage transistor. Less commonly found:

  • Gap and burning of the power cable;
  • Failure of the fuse;
  • Transformer close;
  • Breakdown of rectifier diodes or isolation;
  • Oxidation of the contacts of the tolerance and contacts of the device at the output.

These malfunctions are corrected by cleaning contacts, as well as replacing small parts. Transformer, power cable, automatic control unit.


Protective element built into the board of all factory chargers. Located in front of the rectifier bridge after the transformer. It is intended to protect against typical problems: stress jumps, short circuit and wandering current, etc.D.

The value of the transmitted current strength in the electrical circuit is calculated based on the rated voltage of the battery. Most often, the “hairy” is the main part of the fuse, passes the current up to 5a.

Diode bridge

After checking the fuse, check the rectifier, otherwise it is called the diode bridge. It is four sequentially connected diode, which straighten alternating current and convert it to constant.

Thus, the battery is charged. To repair the diode bridge, you will need to replace the diode or fall out when the faulty element is only one.


The most common reason for the breakdown of the charger for screwdriver. The capacitor is a cylindrical detail that swells due to overheating.

This is followed by a breakdown of the fuse and the subsequent combustion of the rectifier. All elements of the electric circuit are interconnected, and if one of them has broken, and the malfunction was not eliminated, then this will entail other, more serious malfunctions.

If there is suspicions of a breakdown of one of the above elements of the chain, then first you need to check the battery of the screwdriver, because the tool most often ceases to charge precisely because of the faulty battery. If everything is in order with him, then another faulty element should be found that caused a breakdown breakdown.


Need to limit current in electrical circuits. It fails to one of the latter, most often breaks as a result of damage to the entire electrical circuit after a short circuit.

Repair of the charger of a screwdriver

The repair of the charger of the screwdriver begins with the fact that the possible cause of the malfunction is initially identified. Indeed, quite often the reason for the lack of charging the battery is the oxidation of contacts or their clogging on charging. First, carry out a visual examination of the product by evaluating its condition. If there is a smell of Gary, then this indicates the burning of internal elements.

DIY charger is repaired by performing the following actions:

  • First you should remove the cover cover, unscrewing 4 or 6 fasteners.
  • Remove the lid and see that the charging consists of two parts: a transformer and a fee.
  • We begin the repair by the fact that the voltage at the output of the transformer is checked. For this, the tester is installed in the “voltmeter” mode. In this case, it is necessary to include the plug in the outlet.
  • If the multimeter shows the corresponding value, then the transformer is working. If there is no voltage, then you need to call the network cable. If damage to the network cable is excluded, then you need to make sure that the primary and secondary winding is not in the cliff. Usually in the transformers of the imported sample in the initial mark the fuse is installed. It is usually hidden under the shell, so it should be found and rang. When burning the fuse, it should be replaced with similar. If the primary or secondary winding is damaged, then it makes no sense to repair the transformer, since it is easier to purchase a new device. If the cause of the malfunction is a fuse, then after replacing it, before assembling the product, you should check.
  • If the voltage comes to the board, then you should proceed with the search for a faulty element. It is necessary to check the high.Voltage rectifier. Very often, in this case, one of the capacitors is faulty. This is usually an electrolytic capacitor on the board, which is the largest. It must be replaced with the same with the corresponding parameters.
  • If the capacitors are working, then the cause of the malfunction is the breakdown of the transistor. It should also be soldered.

After the repaired charger should be checked for serviceability and functioning. The standard battery charge is from 1 to 4 hours, with a completely discharged battery.

Summing up, it should be noted that for the repair of the charger of the screwdriver, you do not need to be a specialist. The design of this product is quite simple, but do not forget that this element works for electricity, which is life.Threatening. When carrying out repair work, do not forget to observe safety precautions.

How to redo the battery for lithium-ion elements?

Often, the owners of screwdrivers working from Nickel-cadmium batteries want to adjust the battery under lithium-ion batteries. Such popularity of the latter is understandable. They have many advantages compared to other options. These include:

  • The ability to alleviate the weight of the tool (working with it is more convenient if lithium-ion batteries are installed);
  • There is an opportunity to eliminate the notorious effect of memory, because it simply is not in lithium-ion elements;
  • When using such batteries, charging will occur many times faster.

In addition, it is necessary to take into account the fact that with a certain assembly scheme, it is possible to increase the capacity of the charge several times, which means that the period of the screwdriver from the only charge will increase significantly. The positive aspects, of course, are obvious. But it must be borne in mind that there are technology in the adaptation of lithium-ion batteries and certain flaws

It is important to take into account both. Consider what disadvantages you can face in such work:

  • Lithium-ion components of food are more expensive than other options;
  • You will need to constantly withstand a certain degree of charge of such a battery (from 2.7 to 4.2 V), and for this you need to insert the charge of the charge controller and discharge into the battery box;
  • The lithium-ion parts of the nutrition are distinguished by more impressive dimensions than in their analogues, because they are not always convenient and uneasy to arrange in the body of the screwdriver (often there is a resort to different tricks here);
  • If you have to work surrounded by low temperatures, it is better not to use such a tool (lithium-ion batteries are “afraid” of cold weather).

Grubby PSP 1000 Charge Port Replacement. Teardown Fix Clean

If given all the pros and cons, you still decided to replace nickel-cadmium batteries with lithium-ionic ones, then you should carry out the following procedures.

  • First, it is necessary to determine the number of lithium-ion sources.
  • It will also be necessary to choose the right controller fee for 4 batteries.
  • Disassemble the battery housing. Remove nickel-cadmium jars from it. Do everything carefully so as not to break important details.
  • Cut the entire chain using nippers or sidewalls. Do not touch only the upper details with the contacts necessary for connecting to a screwdriver.
  • It is permissible to remove thermistor, because after this, the controller will “observe” the overheating of the batteries after that.
  • Next, you can proceed to assembly of a chain of lithium-ion batteries. Attach them sequentially. Next. Attach the controller’s payment, relying on the scheme. Follow polarity.
  • Now place the prepared design in the battery housing. It is desirable to put in a horizontal position in a horizontal supply lithium nutrition elements.
  • Now you can safely close the battery with a lid. Fix the power element with contacts on the old battery on horizontally lined batteries.

Replacing nickel-cadmium batteries: step-by-step instructions

Step one: first you need to decide on the number of lithium-ion cans and their characteristics. For example, for a standard screwdriver with a voltage of about 14 V, it is recommended to take four segments, which together will give a voltage of about 16 V. It should be borne in mind that some time after starting work with the tool, the voltage will pass and the standard value will be obtained. If you want to increase the battery power 2 times, then it is recommended to take eight such cans.

The number of cans should be chosen at your discretion

Step two: now it is necessary to choose a control of the controller. It should correspond to the total voltage of all elements. On average, the fee is designed for current up to 14 A.

Four power sources

Step Three: now the analysis of the plastic box should be carried out for the battery and get all the old batteries from there. The chain must be cut, because only the upper contacts are left for connection. The thermoresistor will also be necessary to remove, because now the overheating process is controlled by the fee.

Only contacts are left from the previous battery to connect a new power supply to the tool

Step Four: Now, using a soldering iron, it is necessary to form a single chain from the cans, observing the location.

All parts of the battery should be attached alternately

Step Five: Now the resulting battery must be placed in a horizontal position in a plastic box.

This is how the location of lithium-ion cans in the box looks like

Sixth step: now it is necessary to close the box cover, establish contacts from the old battery.

Repair and spare parts for a screwdriver: the circuit of the charger and the cause of the breakdown

Perhaps the most popular tool of any home master is a screwdriver. But this device, like any other, sometimes breaks. If this happens, then in some cases you can replace a screwdriver with an electric drill. But if the work cannot be performed using a drill, then you need to carry a screwdriver to the service center so that the master will repair the device. But this may need a lot of time, as well as cash costs. Therefore, it makes sense to try to make a screwdriver repair on your own.

Before starting repair work, you need to get acquainted with the design of this tool and determine the elements that will be required to fix the screwdriver among them:

The standard design of the screwdriver

The main element is the launch button, it performs a number of functions: turning on the power and engine speed regulator. If you squeeze the button to the stop, then the power supply chain is closed, as a result, the maximum power is provided. The number of revolutions in this case will also be maximum. The device contains an electric regulator consisting of a generator. This element is on the board.

The contact placed on the button will move along the board, taking into account the pressure on the button. The level of the submitted pulse to the key depends on the location of the element. The key transistor acts as the key. The principle of operation will be this: the stronger you press the button, the higher the value of the pulse on the transistor and the greater the voltage on the engine.

The engine rotation reverse occurs by changing polarity on the terminals. This process occurs using contacts that switch with the help of a reverse handle.

As a rule, in the screwdrivers are collector single.Phase DC engines. They are quite reliable, and they are very easy to serve. The standard screwdriver consists of such elements:

The gearbox system transforms high rotations of the engine shaft into the revolution of the cartridge. The screwdrivers uses classic or planetary gearboxes. The former are very rarely installed. Planetary gearboxes consist of these parts:

The solar gear works with an anchor shaft, its teeth activate satellites rotating drive.

A special regulator is installed to regulate the force with which it is supplied to the screw. As a rule, there are 15 provisions of adjustment.

Breakdown of the electric part

The main signs of the breakdown of spare parts in this case are:

  • The impossibility of adjusting the number of revolutions;
  • The impossibility of switching into a reverse regime;
  • Breakdown of the charger;
  • The screwdriver does not turn on.

First you need to check the tool battery. If the screwdriver was installed for charging, but this did not give results, then you need to prepare the multimeter and try to determine it with the help of it.

First, it is necessary to measure the voltage of the battery. This value is required to correspond to about the one written on the case. If a low voltage, then you need to determine the faulty part: charger or battery. What will the multimeter be needed for. This device is included in the network, then we measure the voltage at the terminals at idle. It must be several volts higher than the design indicated. If there is no voltage, then you need to repair the charger.

Repair of the charger

Very often the problem when working with a screwdriver is a quick battery discharge. The cause or wear of the battery, or incorrect charging. We will tell you more about the repair of the charger. For example, we will use charging from Bosch Al 60DV-this device is used paired with nickel-cadmium batteries.

As a rule, all chargers, like most spare parts, are not original, and they are not made in Germany or Switzerland, but in China. But there is nothing wrong here, the quality usually complies with the standard.

Bosch connector three contact: one control connector and two power.

Most often, such a situation appears. The battery is installed in charging. But the charging process ends literally after a few minutes, and the battery is discharged, and the charger stops.

To understand the problem and find a faulty spare part, you need to disassemble the charging. Unscrew the four screws below and open the case. A variable voltage transformer is located in the case, in one compartment, and in the other there is a circuit from a rectifier with power connectors and a chip control.

Then we include charger into the network and measure the current strength on the transformer. If everything is fine, then we proceed to the next procedure.

No need to touch the control chip and rectifier, they are most likely in order. We go to the contact group. One control contact and two power. To determine what the malfunction can be, we need to measure the current strength at power terminals when the charge is working. Why do we solder all contacts on a thin wire. So that the tension can be measured when charging.

It is advisable to use several flowers of wires in this scheme and, accordingly, plus and minus them solder. Then we collect charging and test with the multimeter the current strength on terminals when charge.

If the current strength on the device is unstable and fluctuates in the range from 3-4 to 14-18 volts. Over, if you move the battery, then the contact occurs. It is here that the reason is. During the operation of the device. The terminals are bending and poor contact entails unstable charge of the screwdriver battery.

That is, it is clear that unstable contact violates the work of the logic of charging. Especially the third contact, the manager, it is he who is responsible for which current force is filed for terminals. It will not be able to close it, since the thermoresistor is located inside the circuit of any battery and its resistance changes taking into account the temperature of the spare parts inside the battery. That’s right, it protects the battery simultaneously from overheating and reloading. But in this case there is a way out. We again analyze the charging, bend the terminals, then with the help of the multimeter we look behind the charging process. The current strength on the terminals will slowly increase, and then decrease, and the light bulb on the charge is an additional indicator of the work.

The device of the screwdriver intercol

To repair the screwdriver intercol, you need to know its device. Household dual.Mode power tool consists of the following parts:

  • Frame. Consists of two collapsible parts made of high.Strength plastic.
  • Electric motor. Its design includes brass bushings and steel anchor. The latter is equipped with several turns of the winding and gear. In the lower part of the anchor, graphite brushes are placed, along which electricity from the battery is transmitted to the collector of the screwdriver motor.
  • Gearbox. Transfers the rotation of the engine to the cartridge, while it allows you to adjust the speed and strength of the torque. Can be two.Stage and three.Stage. Household screwdrivers of intercol are mainly equipped with 2-step gearboxes.
  • Battery. It consists of low.Power galvanic elements connected in series or different compositions, which affects the power of the battery and the duration of its operation without recharging. So that the battery of the screwdriver has been working longer, it must be correctly charged. Experts advise, after buying, the battery is completely charge and discharge 3 times, since it has a memory effect.
  • Cartridge. The screwdrivers intercol are equipped with fast.Sounding cartridges, which are fixed on the gearbox shaft using a threaded, screw and conical mount.

Restoration of the battery of a screwdriver after a deep category ⁠

I work in the service center for the repair of electrical and gas tools, power equipment. Periodically, we receive a battery tool for repairs. Both client and pre.Time. With the reason for the appeal: “The battery does not work/does not work”. The premises to this defect are usually:

Today I want to dwell on the last option. A deep category of containers occurs due to a long storage of a discharged battery, for example, in your closet at your home, or, for example, in a cold room. The effect is manifested faster (I am sure that many are familiar with the battery of the smartphone in the cold melting before our eyes). From our wholesale customers, it also happens that a completely new tool with this problem comes. Most often, it turns out that they store the tool all winter in unheated warehouses.

The root of the problem is that even if the battery is not used, it loses its charge, albeit a little. The charge level drops below the minimum-inonable value, and at a certain moment the protection module built into the control board of the charger/battery, or the battery protection module of 18650, refuses to accept the charge, believing that there is some problem with the battery (short-circuit KZ to example). The protection module is necessary for your security. As a result. The battery does not pick up charging, and it is empty, respectively, also does not work. This fact is fair for the entire family of lithium-ion batteries in T.H Smartphone batteries. The most bad in deep discharge is that the battery inevitably and irreversibly loses its container, so keep your battery tool at least a little charged.

The deep discharge of the battery/battery is the smaller of the possible evils and is “treated” very simply: bypassing the control board of the battery/charger, you need to apply for the capacity directly and charge them to the level when the board calculates the level of charge in the general circuit of the regular accumulators and will begin to charge the battery. I suggest going to the workshop)

Yesterday we received a pre-chain battery screwdriver with lithium-ion batteries to 18v, came from a wholesale customer store, with two non-working batteries. The problem was identified during the sale. I took it home for the weekend, especially for writing a post:

charging, screwdriver

Both batteries are discharged, the indication does not work, the charger does not pick up. The voltage is less than the smaller:

The necessary minimum (it is maximum) is a multi.Senior, a screwdriver with a cross.Shaped slot/Torx and a cunning cable. A cunning cable is assembled from any unnecessary ordinary USB cable and a resistor of 62 Ohm (the resistor lowers current and resistance for the most painless for the charging battery). The USB cable consists of 4 cores: the resistor is hung on red vbus 5V, black gnd is not touching. Date and Date- we do not need, you can delete. A cunning cable eats from any power supply for a smartphone, a USB PC USB, but at least from a USB TV connector. In general, any USB-sharing from 5V and from 400mas:

And here we are armed with everything necessary. We catch toothy crocodiles to the multimeter probes, set the “20V DC” mode “mode:

We charge the containers. The charge up to ~ 1.5v empty battery is collected no more than a minute. If, before and after charging, the battery does not gain a charge and shows 0. The battery has gone in defense. In our case, all containers are collected, t.To. The screwdriver is new, they did not use it. From experience, on this model, it is enough to charge each container up to ~ 1.5-1.6V. It happens in different ways, depending on the board, t.E. From the manufacturer and model. I answer the question “Why crocodilic.Renings, not magnets?”. The process is better controlled. Voltage on containers after charging should be the same. Although the fee levels the charge in containers, but from the manufacturer to the manufacturer, it does this with varying success. As a result: if there is a different charge on the containers. When reaching the charge level, for example, in 4.2V on one container, and on the other 3.6V, the fee ceases to charge, reaching the maximum charge on one of the tanks. As a result, we get the battery from 15-16V on board, grab it in a small pinch of screws, after which we will have to charge it by new. We charge with any option you like (we remember that the skirt on the thermal activity is. Where there is a plus where there is no skirts. Minus):

Why the screwdriver of the screwdriver is not charged. The reasons for the lack of charge

Damage or reduction of the battery life can significantly complicate construction work. However, this is not a sentence. And even if the work battery of the screwdriver does not seem to be charged, you can often independently identify the cause and eliminate the fault.

Different types of batteries can be used to store electric energy, each with their own characteristics.

Nickel-cadmium (Ni-CD)

A popular option, although characterized by a greater toxicity of production. In domestic use is safe. The main advantage of this type of battery is a low self.Discharge, which allows you to store an unused battery for a long time.

Additional arguments in favor of the nickel-cadmium battery:

  • Quite compact with a decent container, due to this is well suited for an autonomous tool;
  • Inexpensive, therefore used in an amateur segment;
  • It tolerates temperatures below zero, you can work in the winter;
  • Gives about 100-900 charge cycles subject to instructions for use;
  • Can be stored for a long time in a discharged form.

Along with this there is a noticeable drawback. They are affected by the “memory effect”. If you start charging the battery before it sits down, when used to be used, it will effectively give the current only to the level from which it was charged last time.

A more modern modification, which was designed to eliminate the shortcomings of the Ni-CD batteries, in particular, the production of nickel-metallhydrid AKB is less dangerous for the environment. But the main thing is noticeably reduced the influence of the “memory effect”, so they can be recharged without a complete discharge. True, at the same time grew and self.Discharge. So that the battery does not fail, it needs to be regularly charged. Such batteries are kept only charged.

Standard NI-MH block


Powerful, and more compact. The first and second types bypass the capacity, which pairs with good tolerance of high loads makes them an ideal option for a high.Power tool.

There is almost no “memory effect” for lithium-ion models: in principle, it is, but at the level of interest shares and in practice it does not affect operation. The self.Discharge is also low, and the service life is large.

Modern battery for 18v

However, they also require more careful circulation. With improper use (for example, the integrity of the case is violated) is fiery, up to an explosive fire. Li-Ion cannot be recharged beyond measure. To avoid this, they are supplied with controllers that constantly monitor the level of charge.

Such batteries should be protected from frost. Also, with deep discharge, the container can catastrophically fall, and it will not work to restore it anymore. Therefore, they should be stored in the refrigerator, but at a temperature above 0!, charged by about 40% of the capacity. If the check after 1-2 months reveals a voltage drop below 1 volt, you need to charge the battery again.

How to charge a screwdriver battery: what you need to know

The screwdriver equipped with the battery makes it possible to fully work where there is no way to connect to an electric outlet. This simplifies construction and repair measures, especially in hard-to-reach places. But prolonged use by its intended purpose plants the battery, and immediately the question arises of how to charge the screwdriver battery in order to continue the process as quickly as possible. Chargs come to the rescue here. They effectively recharge the power supply and allow you to further use the tool as intended.

How to replenish the capacity of the AKB nickel-cadmium type

Before you charge the battery of a screwdriver, you need to check its capacity. If the device is only purchased, it will be partially discharged. In order for the battery to gain a working container, it is necessary to minimize it three times and charge it to the maximum. Further, the unit will need to be placed for recharging as it is discharged.

In order for the nickel-cadmium product to fully function and develop its resource, it must be completely discharged and only then charge. If this item is ignored and put on a partially devastated block, the internal plates will be covered with crystals and the basic capacity of the unit will become much smaller. This process is called the “memorization effect” and is to the disadvantages of NICD batteries.

Recommendations for nickel-metallogids

Before you properly charge the screwdriver of the screwdriver from such a battery, it must be completely discharged, since the nickel-metallogid device has a high tendency to self-discharge. To activate the new product, a full circle of discharge/charging must be repeated from 4 to 5 times. After that, the module is permissible to charge as a need.

Nickel-metallological blocks, despite the increased power, have the lowest “memorization effect” and calmly tolerate recharging even with partially filled/devastated base capacity.

charging, screwdriver

Features of charging lithium-ion batteries

You can not think about how to correctly charge a screwdriver of a screwdriver with a lithium-ion battery. Devices have only a nominal “memorable effect”. It does not affect the overall functionality. It is appropriate to carry out energy feeding of such a module when it is convenient, not paying attention to the current level of battery capacity.

How long does it take to recharge

Immediately before you charge the battery into a screwdriver, you need to carefully study the instructions for the tool. There will certainly be indicated the time required to write the block “under the tie”. These terms must be adhered to. Usually the term is from half an hour to 7 hours.

Separate charges for screwdrivers have an indication system. It makes it possible to control the process and stop it in a timely manner when the battery gains full power.

The lithium-ion modules should be monitored more carefully. They are sensitive to complete discharge and charging in excess of the norm. Both of these parameters radically reduce the period of the block service.

The nuances of the temperature regime

You need to find out the temperature of the environment before activating recharging. It is desirable that the indicator is not lower than 10 ° C and not higher than 40 ° C. Gaining working capacity, the battery sometimes becomes warm, and overheating is strictly unacceptable. In the future, this badly affects the device and reduces its performance.

Technical moments of the process

Just know how to correctly charge the battery of a screwdriver is not enough. It is very important to follow the following rules:

  • Do not leave the battery in the charging module;
  • Store the supply unit separately from the instrument in a dry place without temperature differences;
  • With rare use, recharge the modules once a month or according to the instructions of the instructions from the manufacturer.

This will extend the life of the battery and will make it possible to always keep a screwdriver in impeccable working condition.

Varieties of chargers of screwdrivers

Units for charging screwdriver power supply are impulse and standard. The former are most often used to activate a professional tool and can fill the capacity of the power supply in 1 hour. The second belong to domestic and usually spend full charging from 3 to 7 hours.

MEGABATTYY store offers all types of devices for comfortable charging batteries of various types. The assortment line presents models from popular brands that have proven themselves in the market. The acquisition conditions are very profitable and allow the client to buy a device both in retail and wholesale.

Black & Decker cordless screwdriver conversion to Lithium Ion.

Give China) ⁠ ⁠

Recently they took the grandmother of the phone. Brick, ordered Ali and there was no charge in the kit, well, let them take it like a decent cell shop of accessories, it was a kind of “Samsung” and it is strange that it did not have a USB connector, and a ready.Made cord. Soon this exercise was “Ushatan” about the floor, well, I promised that I would fix it. I decided that I was sailing there USB t.To my friend was Tuyeva of the huch wires USB. Micro USB, and the connector itself was lying on, but the worship of this is that the charging plug was freely dangled in the phone’s nest. So I analyze. And here

There was already a slot there, and even the wires that were soldered to are battered, one of them moved away when it was hit from which charging and did not work and there was a “ballast” in order to feel “good” spare parts at least They put a piece of paper, no protection, you never know. OK, cut it out with a soldering iron and cut off excess with a knife.

Yes, inaccurate, but the charging is constantly stuck in the outlet behind the bed and it is difficult to notice it there. And yes, the quality of the soldering is disgusting! The feeling seemed to live a lot on the tin. Jewry to 10 degrees!

It seems that everything is holding, the ballast removed, he does not need themer there. The cable holds tightly in a forgotten and abandoned nest). Okay, I wish everyone good luck and everyone with the past. Do not fall for this, would not be me my grandmother would again buy me another poop. My age does not exceed 13 years, so for me this skill is still.

How to repair a screwdriver charger

Когда разобран блок питания и найдены вышедшие из строя элементы, то провести ремонт зарядки электрического шуруповерта, не составит большого труда. To do this, you will need to arm yourself with a soldering iron, as well as a flux and solder, and then get down to business.

It is interesting! It is strongly recommended to use rosin as a flux, but orthophosphoric acid, as it copes with its task much more efficiently, and is very cheap.

In order to repair the charger for a screwdriver with your own hands, you will need new elements that need to be installed instead of failed are a fuse, resistors, diodes and capacitor. These elements of a penny are worth, and if you have at your disposal old charging blocks or microcircuits, then you can fall out of there. When all the tools and elements are ready, you can start repairing.

  • First you need to fall out or remove the fuse. Depending on the model of the power supply, the fuses in it can be inserted or soldered. Even if it is an insertion of a fuse, and you managed to find only the one that is with the legs, then the inserts need to fall out of the board and instead of them to the contacts, solder the safety element
  • If the capacitor is swollen and does not work, then it also needs to be dropped out, and replace it. When falling out, do not forget to see which legs are located. This is very important, otherwise the element will work incorrectly, which will lead to a second failure. Positive contact of the plus capacitor must be connected in a chain with diodes cathodes. In order to understand what it is about, below is a scheme on which the site of interest is highlighted. When installing a new capacitor, you need to choose it according to the parameters that the element has failed
  • If a diode bridge has come out of the system, then you need to fall out diodes and solder them. It should also be borne in mind that the diodes should be soldered in the correct position. The anode on the input of the high.Voltage part, and the cathode for the low.Voltage part. If you FOCUS on the scheme that is presented above, then the difficulties with soldering the elements will not arise

If the resistor, transistor or other elements is faulty, then they are also replaced. The biggest difficulty that you can meet when repairing a charger is a failure of a microcontroller. The termistor, which is located in the design of the primary winding of the transformer, may also get out of order. Its purpose is a restriction and reduction in starting current. Thermistor contributes to the charge of capacitors that stand at the input of the scheme. How to repair the charger block of the screwdriver, if the termistor came out of the system, is described in detail in the video.

If this element has failed, it is easier to buy a new block, since it is very difficult to find a similar element, and even if it succeeds, then for soldering you will need to use a special hairdryer.

After a simple repair of the charger of the screwdriver, you need to initially check its performance, and only after that you can connect the battery. How to check the operability of the renovated charger. Include it in the outlet (only first install the lid in place), and connect the cartridge probes to the conclusions. The corresponding values ​​mean that the device works, and can be applied. Now your Shurik is saved, and can last you for a very long time.

It is interesting! You know why often chargers break. Because unscrupulous manufacturers exclude many elements from the scheme, due to which the load on others increases, so the capacitor does not withstand, and swollen. Another reason is also the wrong choice of elements, therefore, as a result, after buying a new screwdriver, you need a repair of a charger.

Summing up, it should be noted that it is impossible to store the battery of discharged for a long time, and if your charging unit has broken from the screwdriver, then you need to start repairing it immediately, otherwise putting this process into a long box will not lead to anything good, but will only contribute to the need to purchase a new one battery, in addition to the charger. By the way, if it is not possible to repair the charger from the screwdriver or the device was lost, and it is impossible to find this on sale, then making the issue of charger with your own hands will help to solve the issue. However, this will need some knowledge in electrical engineering.

How to repair a charger for a screwdriver. Types of breakdowns and their solution

Charging repair for a screwdriver is a simple procedure, you need to know where to look for the reasons for the breakdown and how to cope with them. Typical breakdowns occur in capacitors, resistors and fuses.

How to check the performance of a screwdriver charging

The first thing to do if the charger of the screwdriver has ceased to regularly charge. Check the power supply unit. This follows:

  • Connect the power supply to the mains.
  • Take the multimeter and set the permanent voltage measurement mode, which varies from 9 to 24 volts.
  • Attach the multimeter to the contacts of the charger, observing the polarity of the terminals.
  • Look at the testimony of the tool that are displayed on the screen.

The following 3 situations are mainly taking place:

  • The screen of the permanent voltage meter shows the value of “0”. Non.Working power supply, it needs to be repaired or replaced.
  • The displayed voltage corresponds to the power supply specified in the description. This means that the device is regular.
  • When the multimeter is applied to the contacts of the power supply, the device displays the value below the specified value, then charging must be repaired. This means that radio elements came out of the system.

Also, the cause of the screwdriver of a screwdriver may be the fault of the electric network. It can be checked in two ways: connect another tool to the outlet or try to charge the battery from another network.

What can break

There are a number of “typical” breakdowns inherent in battery screws. Their list contains a fuse, a diode bridge, a capacitor and a high.Voltage transistor. Less commonly found:

  • Gap and burning of the power cable;
  • Failure of the fuse;
  • Transformer close;
  • Breakdown of rectifier diodes or isolation;
  • Oxidation of the contacts of the tolerance and contacts of the device at the output.

These malfunctions are corrected by cleaning contacts, as well as replacing small parts. Transformer, power cable, automatic control unit.


Protective element built into the board of all factory chargers. Located in front of the rectifier bridge after the transformer. It is intended to protect against typical problems: stress jumps, short circuit and wandering current, etc.D.

The value of the transmitted current strength in the electrical circuit is calculated based on the rated voltage of the battery. Most often, the “hairy” is the main part of the fuse, passes the current up to 5a.

Diode bridge

After checking the fuse, check the rectifier, otherwise it is called the diode bridge. It is four sequentially connected diode, which straighten alternating current and convert it to constant.

Thus, the battery is charged. To repair the diode bridge, you will need to replace the diode or fall out when the faulty element is only one.


The most common reason for the breakdown of the charger for screwdriver. The capacitor is a cylindrical detail that swells due to overheating.

This is followed by a breakdown of the fuse and the subsequent combustion of the rectifier. All elements of the electric circuit are interconnected, and if one of them has broken, and the malfunction was not eliminated, then this will entail other, more serious malfunctions.

If there is suspicions of a breakdown of one of the above elements of the chain, then first you need to check the battery of the screwdriver, because the tool most often ceases to charge precisely because of the faulty battery. If everything is in order with him, then another faulty element should be found that caused a breakdown breakdown.


Need to limit current in electrical circuits. It fails to one of the latter, most often breaks as a result of damage to the entire electrical circuit after a short circuit.

How to find what exactly broke

Before engaged in the repair of a charger or battery for a screwdriver, it is necessary to measure the voltage indicators of the circuit. This will help a multimeter designed for measurements of current and voltage, as well as resistance and capacitance of capacitors. After that, you should make sure that it is the charger to be to blame. To do this, it is connected to an electric network and pay attention to the LEDs. If the light does not burn, then you can move on and look for damage directly in the elements of the chain.

  • Pick up a tester or multimeter
  • Turn the power supply in the outlet
  • Set the permanent voltage measurement mode on the multimeter. The voltage value depends on the tool itself. To find out the value of the output voltage, you need to inspect the sticker with the description. Typically, the amount of output voltage is in the range from 9 to 24 V
  • The red pike of the multimeter is required to touch the positive contact of the charger, and black to the negative (or minus)
  • Pay attention to the multimeter screen, and the values ​​that he shows

Cordless Screwdriver with Lithium-Ion Battery | CDM1108S

Depending on the readings of the multimeter, you can draw the corresponding conclusions:

  • If there are no indications, that is, on the screen the number “0” is a non.Working block, and therefore requires repair or replacement
  • If the indications of the multimeter correspond to the value indicated on the power supply. The device is regular, and the cause of the multimeter inoperability is hidden with a high probability in the tool battery
  • If the readings on the device are below the values ​​indicated on the power supply, that is, at the rate of the output voltage of 9V or 12V, the device shows 3V, 5V or 7V (or other values). The elements of electronics are out of the system, so you will need a small repair

There is another option for the development of events. The device shows the values ​​above the denomination indicated on the charger block.

Such situations are rare, and if the block gives out voltage, higher than indicated on the power supply, then this can disable the battery or reduce its resource. In this case, you also need to resort to the repair of the charger from the screwdriver.

If the check in a multimeter confirms the malfunction of the charger, then it is time to start searching for a malfunction.

!Many, when the charger exit from the screwdriver, prefer to purchase a new one, but it is not as simple to find it as it might seem. Especially if the tool of a little.Known company, and bought a long time. Based on this, nothing else is left to begin to start repairing the device.

What can break in a charger from a screwdriver

About what breaks in the charge of a screwdriver is known to specialists who are faced with the problem of instrumentalness of the tool. Buying a new charge for a screwdriver is irrational, so if the battery of the power tool does not gain a charge, then you need to start repairs with the search for the cause of the breakdown.

The reasons for the inoperability of the charging blocks of batteries are the following details and mechanisms:

  • Fuse. All electrical appliances that are not “in the basement” have protective elements, and one of those is a fuse. He protects the charge of the charger from overstrain, wandering currents, short circuits, etc.P. To do this, in the design of the circuit, a fuse is used, designed for the corresponding current rating, the value of which depends on the voltage of the battery. Usually its face value is 5A, and it is placed immediately after the transformer in front of the rectifier bridge. The fuse has a cylindrical design of transparent glass with steel contacts on the sides. Inside is the “hairy”, which is designed to pass the current with a limit of up to 5a (on different models, the current value may vary)
  • Rectifier or diode bridge. If the fuse is serviceable, and how to check it is described below, then we proceed to the consideration of the diode bridge. These are four diodes that are designed to straighten current from the alternating from the network to a constant, required for charging the battery. To fix the rectifier, you will need to fall out of a faulty diode or all the diodes, and replace them
  • The capacitor is a large cylindrical barrel, which very often causes the device to fail. The capacitor swells, as a result of which the fuse is out of order, and often this entails the burnout of the diode bridge
  • The high.Voltage transistor of the inverter, which very often fails on charging blocks of screwdrivers, designed for 220V
charging, screwdriver

What element would not have failed, but first you need to make sure that the breakdown is precisely in the power supply itself. After all, they often sin on the power supply, although in fact it is high time to replace the battery.

�� Repair charge port of Parkside Cordless Screwdriver

If you are going to repair the charging screwdriver, then you should start by checking the device for a malfunction.

The instructions are described above how the check checks the block itself, so now we will find a faulty element, which is the cause of charging inoperability.

How to find a breakdown in the charger block of a screwdriver

What is needed in order to find a breakdown in the charger block of a screwdriver, few know, so let’s consider this process in detail. You should start with disassembling the charger, but this is done exclusively on the device disconnected from the network. Make sure that the plug of the device is not connected to the outlet, and only after that begin to disassemble the structure of the case.

Device wireless power sources

Chargers of batteries convert AC 220 V from the network into direct current. To perform its functions, the charger has a transformer and a special printed circuit board. Batteries produce current due to a chemical reaction between two electrodes and electrolyte. The voltage is in the range from 1.2 to 24 V or more, depending on the type of battery and current strength. Many wireless devices are powered by a rechargeable nickel. Cadmium battery or battery, consisting of 20 cells. Each cell provides direct current of about 1.2 V. Packages are built directly into the tool and have clicking clamps.