How to disassemble the Bosch screwdriver battery

Table of Contents:

Reanimate a damaged battery

This method is suitable for the most common elements. nickel-cadmium. In most cases, it is enough to “reflash” the banks. that is, to save them from the negative consequences of the memory effect.

This method will work if the electrolyte in the batteries is not dry.

Using the method described above, we identify the most damaged elements and solder them. Then, using a charger with a current and voltage regulator, we produce a shock charge for 3-5 seconds on each bank. The voltage value during charging must be three times the nominal value (in our case, 3.6 volts).

We check with a tester. the voltage after charging should be about 1.4 volts. If not, we send the item for scrap.

If it was not possible to reanimate the elements, we return to replacing them.

How to repair a screwdriver battery yourself

disassemble, bosch, screwdriver, battery

  • Screwdriver device
  • Step-by-step instructions for repairing a screwdriver battery
  • Step one
  • Step two
  • Step three. Soldering
  • Battery types for screwdriver
  • Nickel-cadmium (designation. Ni Cd)
  • Nickel metal hydride (designation. Ni MH)
  • Lithium-ion (designation. Li Ion)
  • Battery recovery
  • Replace battery cells (banks) in the battery
  • Reanimate a damaged battery
  • Another way to recover your battery. video
  • New battery in an old case

A screwdriver is a fairly common tool in the home craftsman’s arsenal. As a rule, it is used not only for its intended purpose. This is a portable drill, a grinder, and even a circular saw.

BOSCH screw driver before battery repair

With such intensive use, the batteries are constantly under full load and their lifespan is reduced.

An additional factor accelerating failure is the poor quality of the supplied chargers. As a rule, this is a primitive power supply without charge level control.

To carry out an independent repair of a screwdriver battery, you need to understand its structure and possible causes of failure.

Inexpensive models simply supply a given voltage or current to the battery, without being able to initiate discharge or recovery modes. But let’s take it in order.

Nickel metal hydride (designation. Ni MH)

Such battery cells can be found both on economy class models and on available versions of famous brands.

Just like nickel-cadmium, they are installed on household electrical appliances with low intensity of use. Working voltage of a serviceable and charged cell. 1.2 volts.


  • Produced in developed countries, since the production is environmentally friendly.
  • Virtually no self-discharge.
  • Small memory effect, you can recharge by 30-50% and work quietly on.
  • Sufficiently high capacity, this allows you to work at a distance from a stationary outlet, for example, in a garage or when building a summer cottage.
  • Such elements are designed for a large number of charge-discharge cycles, which compensates for their high cost.


  • Higher (in comparison with nickel-cadmium) cost.
  • When stored in a discharged state, it loses some of its working properties. This forces the owner to recharge regularly, even when the tool is not in use.
  • Poorly tolerate low temperatures, which forces the product to be stored in a heated room.

BOSCH GO Screwdriver. Disassembly

Replace battery cells (banks) in the battery

If you decide to do the repair yourself, then you need to understand that the banks are selected similar, preferably of the same chemical type, so that they fit your charger.

Most manufacturers (this is especially true for economy class models) simply put cells (cans) in the battery case, at best, fastening them with insulating tape.

All battery banks must be sequentially soldered together

It is better to solder with a powerful soldering iron to reduce the heating time of the cans. Use harsh fluxes for aluminum or iron applications. Then you need to rinse the soldering point with isopropyl alcohol.

The first few charge-discharge cycles must be carried out completely in order for the battery to “remember” its maximum capacity. This is especially true for nickel-cadmium batteries.

There is a more economical option, but it will take longer. You can replace not all, but only those banks that are guaranteed to be out of order. To do this, you need a “donor”. a damaged battery with the same elements.

You can buy it at a service center or at the same radio market. It is necessary to fully charge both batteries, and measure the voltage on each bank with a tester. Select from both sets the elements that produce the closest value to 1.2 volts.

We check the charged battery with a tester, determine the damaged jar

Assemble a remanufactured kit from them. The effect of such a decision is not comparable to a complete replacement with new cans, but at least your instrument will be brought back to life.

Step-by-step instructions for repairing a screwdriver battery

  • Two batteries
  • Charger
  • Any screwdriver (thin flat)
  • Scalpel
  • A piece of sandpaper, grain 500
  • Two wires
  • Load resistance 0.5 ohm (less is better)
  • A multimeter with which you can measure the voltage, in this case up to 20 volts
  • Simple pencil for notes

Lithium-ion (designation. Li Ion)

Installed on professional or semi-professional screwdrivers with high intensity of use.

Such batteries are used by renowned manufacturers in models of the middle and high price segment. Working voltage of a serviceable and charged cell. 3.6 volts.


  • There is no memory effect.
  • Recharging can be done at any percentage of discharge.
  • Self-discharge is practically absent.
  • Can be stored in a charged state for a long time.
  • High capacity, allowing remote work all day long on a single charge.
  • The number of charge-discharge cycles is ten times greater than that of nickel batteries. Therefore, when calculating the cost, you should pay attention to this characteristic.
  • High voltage per cell makes the battery more compact and lightweight.


  • High price. This is compensated by progressive characteristics, but is often an insurmountable obstacle when choosing a model of a screwdriver.
  • Lithium-ion batteries have a maximum service life of 3 years. After this time, the chemical components of the batteries decompose, rapidly decreasing the capacity.

Step three. Soldering

What you need to know before you start soldering?

You can connect the cans to each other by soldering the plates that extend from each element. Soldering is carried out using acid or aspirin.

  • Grind the tablet, pour it on the contacts, melt the aspirin and a drop of solder with a soldering iron. You can take the solder pos-60. It is a soft, low-melting, very fluid solder.
  • Work in a well-ventilated area, as acid or aspirin fumes are harmful to health.
  • We check the soldering strength, if everything is fine, remove the remnants of aspirin. We don’t need extra acid.

That’s all. We pack a set of cans into the case, glue the connection, put on charge.

Battery recovery

If your screwdriver “fell silent” due to the failure of the batteries, this is not a reason for despair. Battery repair can be done with your own hands, at a cost that is several times less than when buying a new one.

There are three ways to repair a battery for a screwdriver:

We disassemble fasteners on screws, latches

The screws must be unscrewed with a screwdriver having the appropriate shape of the tip, otherwise the edges of the figured recess of the screw head will be chipped off and it will become impossible to unscrew it. It should be remembered from which hole each hardware is unscrewed, so that during assembly they are all set in place. This is due to the fact that the length of the screws can be different. When a long screw is placed in a short hole, it breaks through plastic and can damage cans, microcircuits. A short piece of hardware in a deep hole will not provide a reliable connection.

Battery cases are equipped with one or two latches. They are loosened with sufficient, but not too much force. In the case of two latches, they must open synchronously.

How to disassemble the battery of a Bosch screwdriver

To fix a damaged battery pack, replace one or more nutrients, or convert it to another type, you need to have competent knowledge of how to disassemble the battery of a Bosch screwdriver. Incorrect actions can cause damage to the case, the power modules themselves (cans), due to which the battery pack will become completely unusable.

Mounting types, battery disassembly specifics

Different types of fastening can be used for battery blocks:

  • screw;
  • glue;
  • on latches.
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Often there is a combined connection, when the battery for a Bosch screwdriver is fastened simultaneously with two types of support, for example, glue and screws.

For bodies that are fastened in different ways, different methods of parsing are applied with a certain scheme of actions. This is due to the risk of damage:

  • hulls;
  • microcircuits, if any;
  • power modules.

Defective as a result of careless, abrupt movements, electronic microcircuits will become ineffective and require replacement. Broken cans are dangerous for their leaked electrolyte, which makes the board unusable, and under unfavorable circumstances can cause an explosion.

How to disassemble the battery of a Bosch 12V screwdriver with glue

Glue lining is the most difficult to disassemble due to the high risk of plastic cracking. Two disassembly methods can be used.

  • Using a mallet or other hammer with a soft striker (rubber, etc.). The entire perimeter of the glue seam is tapped with a mallet, applying moderate force, so that it slightly springs from the body. The process should take quite a long time (from 10-15 minutes), be accompanied by characteristic sounds (crackling), which are emitted by a crumbling layer of glue. In the process, they periodically try to unfasten the block, stretching its halves in opposite directions.

When the crackles become regular, you can additionally use an object with a thin blade (for example, a knife). It is immersed in the seam as a wedge and trying to break the glue with loosening movements.

  • With a flat screwdriver, chisel. The method requires increased accuracy, since the likelihood of the battery case breaking is too high. The thin end of the sting / blade is repeatedly passed along the seam, trying to loosen it. You need to act carefully so as not to provoke the appearance of splits. If cracks do appear on the plastic, but their number and size are small, you can treat them with an adhesive (dichloroethane, etc.).

How to disassemble a screwdriver battery

To understand how to disassemble a screwdriver battery and not damage it, you should adhere to some simple rules. The battery is disassembled in order to replace the batteries or transfer it to a different type of nutritional element: for example, change the nickel batteries to lithium ones. Disassembly operations must be careful and precise in order to avoid damage to other important elements of the screwdriver and to ensure the correct operation of the tool in the future.

  • Preparation for work
  • Mount types
  • Fastening with glue
  • Snap fastening
  • Using screws
  • Features of the battery in screwdrivers

Preparation for work

Battery blocks are almost all the same in their design and consist of a case, inside which there are battery cells, soldered in a certain sequence.

Tools required to disconnect the battery depending on the type of attachment:

  • screwdriwer set;
  • mallet with rubber striker;
  • a knife with a thin blade;
  • building hair dryer (if available).

Fastening with glue

Care must be taken with the glue line to prevent cracks and chips on the plastic. The glue layer is hit with a rubber mallet for 10-15 minutes. You need to act slowly, gently pull the halves of the case and separate them from each other. Gradually, the glue seam will collapse, begin to crack and you can use a knife to open the seam.

To facilitate the process and save time, it is better to use a building hair dryer. A hot stream of a hair dryer heats up the adhesive layer along the entire perimeter. Under the influence of thermal air, the glue will become soft and further opening of the case will be easy.

Important! Heat work must be carried out at a safe distance using gloves.

Snap fastening

Snap fastening is the easiest way to detach. The latch is either one or two on the sides. A little effort is needed and they will open.

Mount types

The battery case is fastened to the device in 3 ways:

  • With glue.
  • Snap fastening.
  • Using screws.

Some models use several combinations of fasteners with different types of fasteners: for example, screws and glue.

Using screws

To unscrew the module, select a screwdriver that is suitable in shape and length. It is very easy to disassemble the unit, for this you need to unscrew the screws and detach the case. It is necessary to remember from which holes the screws were unscrewed in order to screw into place during assembly.

Important! Each screw removed during assembly must be strictly in place to avoid electrolyte leakage.

Features of the battery in screwdrivers

Opening the case, you can see a cassette of elements, which provides the necessary voltage. Batteries are called “cans” and are usually of a standard size and voltage. Their difference is only in the capacity, which is indicated on the battery cylinder. The higher the battery power, the longer it will work.

It is better to have two batteries so that you can charge the second when working with one.

Lithium-ion batteries contain a control board and the cells are protected by a casing or foil. If lithium decomposition occurs, then such batteries cannot be restored.

Some nickel batteries have a thermal sensor. Nickel-cadmium batteries can be recovered.

The screwdriver battery is disconnected and the malfunction is determined. An effective method for repairing batteries is replacing faulty elements or “cans”.

The operating instructions do not recommend disassembling and changing the screwdriver battery. But the price of the battery is more than half the cost of the tool. Not everyone can afford to buy a new tool, so some craftsmen disassemble, repair, restore and change the main elements of the battery.

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How to assemble one battery from two

It so happens that the best way out of the situation when both batteries are “hooked” is a way to assemble one complete battery of two. Using any of the proposed methods, you can disassemble both blocks in order to understand which elements are suitable for further use, and which should be discarded.

For this you will need:

  • two batteries;
  • Charger;
  • any thin and flat screwdriver;
  • scalpel;
  • a piece of sandpaper;
  • two wires;
  • load resistance (two are possible);
  • voltmeter for voltage measurements.

We measure the voltage

Before measuring the voltage of the cells, prepare a simple pencil with which you will write down the value of U issued by each battery in the bundle. Since in most cases “running” screwdrivers are equipped with nickel-cadmium batteries packed in dense cardboard layers, it is important to ensure that the batteries are accessible from both sides.

Now it remains to turn on the voltmeter (or multimeter) and start measuring. When measuring, we make each battery an exposure for five seconds and see if the voltage drops (usually it is normally about 1.2 volts for each battery separately). We fix the indicators with a pencil. It is impossible to keep the probes on batteries for a long time, because the resistance increases, and they can simply burn out.

Practice shows that one has only to fail one element from the entire bundle, this negatively affects the operation of all batteries. If the voltage indicator on any “bank” is 1 volt or less, it has already exhausted its resource. In order to finally make sure of this, you should check the self-discharge level of each battery in the bundle.

Repeated measurements are taken after 15 minutes. When measuring, be sure to check the primary U values ​​with repeated ones. If it turns out that there are batteries, the voltage of which after the initial measurements dropped sharply during the second measurement, it means that they have a high self-discharge, and it is these elements that have already completely become unusable.

After the unusable elements are “calculated”, we disconnect them from the rest with a scalpel, and in their place we put usable batteries from a spare battery. So we redo the whole block, collecting one full-fledged from two.

We disassemble the battery with a spatula or a clerical knife

For those who are not used to working with a mallet and want to make the battery disassembly process look quieter and more gentle, you can suggest using a small metal spatula or a utility knife. The main thing is that they do not have sharp edges, like a large screwdriver, which can easily damage plastic.

First, you should completely walk with a knife around the perimeter of the entire block in order to loosen the seam, and only after that, with a small screwdriver, you can begin to “pick out” the flexible plastic. The method is no less painstaking than the first, and if the person is not experienced enough, damage may remain on the plastic case. However, if you work as carefully as possible, it is possible to do without “losses” and in this case.

If, when disassembling the battery pack, you still have cracks or other damage, you should not be upset, because this type of plastic lends itself well to gluing with dichloroethane.

We solder banks

Soldering should be done by spot welding using a regular aspirin tablet. It is impossible to solder one element directly to another: any heating causes evaporation of the electrolyte and a rise in temperature, which can be critical for the battery.

When disassembling the bundle and soldering, it is important not to lose metal particles, which may be indispensable when soldering the elements together. To be on the safe side, you can take care in advance of how to make blanks of spare plates from bending metal. It is important to remember the following: the better I solder, the better the battery will work.

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Aspirin gives off a lot of corrosive fumes, so work in a well-ventilated area. A soft fusible composition with flowing properties is taken as a solder. The solder is sprinkled with aspirin powder, so it flows between the plates and connects them securely, and aspirin helps to fix the composition in the right place.

The assembled battery is installed in the case, and the operation of the screwdriver is checked. If the tool is running, the newly assembled battery is charged as usual and its functionality is checked again. If no drop in RPM is observed for the instrument, this means that the experiment was successful. Since nickel-cadmium batteries work for a long time with proper operation, there is a chance that a new bundle assembled with your own hands will not let you down, and a self-made screwdriver battery will work properly.

How to disassemble a battery using a regular mallet

In order to disassemble the battery from a Bosch screwdriver, Metabo or any other tool of 12 volts or more, you need to make some effort. If you just pick out the adjacent edges of the battery pack with a screwdriver, it will turn out to be sloppy. In addition, there is a greater risk that the fragile plastic structure will simply break.

Therefore, it is recommended to take a mallet and begin to slowly tap on the edge of the seam until characteristic sounds appear, meaning that the seam itself begins to weaken on the sly. It will take a long time to knock, and it will take time and patience. But it is in this way that you can ensure that the disassembly of the battery from the Makita screwdriver will be crowned with success, without unnecessary breakdowns and losses.

After a while, you will hear a crack of a breaking seam. The batteries themselves inside from such manipulations will not be damaged. Only the seam that holds the block will break, and the “cans” and the two halves of the plastic case will remain unharmed.

When we disassemble the block, knock on the body with a mallet lightly, without making any special efforts, so that it bounces slightly off the surface. From time to time, between tapping, you can try to slowly pull back the bottom cover of the block, thereby checking how much the seam has loosened. In such cases, the mallet itself will be slightly damaged, but there is nothing wrong with that.

When the clicks when tapping become regular, you should check the block with some thin knife, carefully inserting it between the halves of the case. When the two parts of the case begin to open, it will be visible. it means that we have almost achieved our goal.

It is worth warning right away that the battery packs of the 12-volt Makita screwdriver are often extremely sturdy and difficult to disassemble. But if you slowly work with a mallet, the seam on the glue will gradually crumble. This may take ten minutes or more in time. But for a person with experience, the whole process takes no more than six minutes.

This is how, gradually and accurately, you can disassemble the screwdriver battery, which the manufacturer intentionally made “non-removable”. with the aim not to change the batteries in it, but immediately run after a new one, which is expensive. Of course, this will require some skill and accuracy. But it will also save money, and at the same time learn how to disassemble the battery from the Makita
screwdriver with your own hands.

What is the load for?

Let’s work with the load resistance. As already mentioned, you can take two, each with a nominal value of 1 ohm. If we put both of them in parallel, then the total resistance we get 0.5 Ohm. It is not necessary to adhere to these ratings, but the lower the resistance, the better.

What is the role of load resistors in qualitatively replacing the battery pack? If we take any electrical appliance and measure the voltage in its battery, we get a certain value. However, this value does not show how well a particular battery can give up its energy. If we measure the voltage under load, we will have what is called “voltage drop”. It is just from it that you can judge how good or bad the battery is.

The load resistance in the form of two small metal blanks and wires connected in parallel to each other is carefully connected to a voltmeter. This loading method is acceptable only if the output voltage of your battery is 12 volts or less (safe voltage level).

The wires are neatly fixed in the “sockets” of the voltmeter with probes, and a constant voltage threshold of 20 volts is set on the voltmeter. This indicator is quite enough to measure U for the entire bunch of elements as a whole and for each element separately, which is especially important.

Charging the batteries

Before disassembling the blocks, be sure to charge them well. With subsequent voltage measurements, this is exactly what will make it possible to understand which batteries are “live” and which are not. Before charging the batteries, it is recommended to clean the internal contacts of the charger with emery paper, because any contact resistance can “give out” an incorrect charging process.

When you charge both batteries alternately, pay attention to how fast they charge. If the battery is charged quickly, and the charge indicator signals the end of the process after just a few minutes, this means that there are definitely faulty cells in the battery. And of course, when the battery charges too slowly, or does not take current at all, it should definitely be disassembled and “tested” all the batteries that are inside. Read more about the charging time of the screwdriver battery →

After you charge and disassemble your battery pack, you will see that there are several elements inside it. cans. The number may vary depending on the voltage level of your instrument. Banks are connected in a certain series. Inside there is a thermal sensor brought out to the contact plates.

If the signal from the temperature sensor going to the charger is incorrect, then the battery will receive either an undercharge or an overcharge. Both are highly undesirable for the battery and adversely affect its performance. This is why it is strongly recommended to clean the contacts before charging both batteries.

How to disassemble a screwdriver: independently or with the help of a wizard?

The screwdriver is the tool that ideally combines high functionality, autonomy and compact size. With this technique, you can perform a wide range of tasks, from screwing screws and punching holes in soft materials to complex precision work on a large scale. Today the screwdriver is in great demand not only among professionals who are engaged in repair and construction, but also among home craftsmen. With this tool, you can fix shelves, hang pictures, assemble furniture and perform many other operations.

The need to disassemble the screwdriver arises in such cases:

  • for lubricating parts;
  • to replace worn out or faulty parts.

For this, some take the tool to a service center or an equipment repair shop. However, if you do not have time or the warranty period has expired, it is quite possible to disassemble the screwdriver yourself. The main thing is to have some idea of ​​how the instrument works.

How to disassemble a screwdriver for troubleshooting?

How to disassemble the Interskol screwdriver or a tool of another brand?

All instruments are outwardly similar to each other. The design of the screwdriver has a characteristic shape (reminiscent of a pistol), the body is made of durable shockproof plastic. The working equipment is fixed with a keyless chuck. To disassemble a screwdriver, a number of simple operations should be performed, namely:

In order for you to have to disassemble and repair the screwdriver as rarely as possible, you should check the charge of its battery before work, select the correct attachments, clearly fix the cartridge and adjust the rotation speed of the bit.

Dismantling the “Makita” screwdriver: causes of malfunction

High quality power tools are produced under the Makita brand. The screwdrivers of this manufacturer have high power, optimal weight (about 1.5 kg), LED backlighting. Thanks to these qualities, the tool is convenient to use under any conditions, including in poorly lit rooms. The handle is rubberized, so it is easy to hold it. Before you disassemble the screwdriver, you need to determine the cause of the breakdown. Such malfunctions often occur:

  • The instrument does not turn on. In this case, you need to disassemble the screwdriver, inspect the battery, check the contacts and connections in the case, and the wiring. Checking should be done with a multimeter.
  • The reverse button does not work. Such a breakdown suggests that it is not possible to twist and unscrew screws and bolts. In case of this malfunction of the screwdriver, you need to disassemble it and use a multimeter to check the resistance of the button by placing the probes on the output and input wires.
  • The speed regulator does not work. As a result, the turnover will be either overestimated or underestimated. The reason lies in problems with the transistor or brushes. To understand what exactly does not work, you need to disassemble the tool and visually inspect the details.
  • There are extraneous sounds or hum when the screwdriver is running. This indicates that the bearings are worn out. To eliminate the breakdown, you need to disassemble the screwdriver and check the integrity of the motor armature bearing and the gearbox. If the parts are in good order, check the bushings.
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How to extend the “life” of a screwdriver?

It’s not just cheap tools that fail. Any equipment wears out over time, requires timely maintenance, replacement of parts. To prolong the life of the screwdriver, it is important to adhere to some recommendations. In particular, these are:

  • Observe the operating conditions. If you drill concrete every day with this tool, it will deteriorate very quickly.
  • Consider the appointment. Distinguish between household and professional screwdrivers. If the latter are designed for long-term trouble-free operation, then amateur tools can be operated no more than two hours a day.
  • Do not violate storage conditions. The equipment must not be stored in rooms with high humidity levels. If the mechanical or electrical parts of the tool become damp, the screwdriver will quickly fail and must be disassembled. You need to store it in a dry, ventilated place, at an optimal temperature, because the battery is destroyed in the cold. In winter, it is better to leave the tool in a heated room.
  • Do not expose to adverse weather conditions. Not only snow or rain, but also sunlight can negatively affect the performance of the screwdriver. If the device overheats, then when turned on, it may simply burn out. Therefore, be careful not to leave the device under the scorching sun for a long period of time.

Knowing how to disassemble a Zubr screwdriver or a device from another manufacturer, you will not be left without a tool for a long time. There will be no need to take the equipment to the workshop, wait until diagnostics and repairs are carried out. You will be able to independently determine the cause of the breakdown and eliminate it as quickly as possible.

Charger repair

To restore the performance of rechargeable batteries, a charger is used on the power tool. Bosch screwdrivers are no exception. One of the failures of the screwdriver is the failure of the charger.

BOSCH Upgrade Battery / Change Old Dead Li Ion Cell / GSR BAT411

This breakdown manifests itself as follows. The rechargeable battery is set to charge. The device turns on for literally a few minutes, and then turns off, indicating that the charging process is complete. In this case, the battery remains in a discharged state.

To find out the reason for the refusal, you must:

  • Disassemble the charger case by unscrewing 4 self-tapping screws. It consists of two sections. In the first, a transformer is installed, in the second. the control board of the device.
  • Now you need to apply voltage to the transformer and measure the current. If it matches the face value, go to the next operation.
  • As a rule, the control chip and rectifier are in good order in this case, so you need to check the power connectors while the device is operating. A thin wire must be soldered to each contact. They will make it possible to measure the voltage during the operation of the device.
  • Charging is turned on and current measurements are taken. If the readings are unstable, up to complete disappearance, then the reason is the bending of the power terminals due to prolonged operation of the device.

Restoring contact will allow you to get a full charging process.

Battery repair

One of the main components of the power tool assemblies is the power source. In a screwdriver, this is a battery. It is a battery of galvanic cells connected in series, which are made in the form of cylindrical cans. The size of one element is 33 or 43 mm in height and 23 mm in diameter. The number of cans is determined by the voltage of the assembled tool battery:

  • 12 volts corresponds to 10 cells;
  • 14 volts will require the installation of 12 elements;
  • 18 volts corresponds to 15 elements.

Bosch screwdrivers: malfunctions as a result of long-term use

The popularity of automation of the process of installation and dismantling of structures gave rise to the mass production of devices with an electric motor. A large number of companies from around the world took up the manufacture of screwdrivers. The palm went to the German manufacturers of Bosch power tools.

The screwdrivers of this company are distinguished by solid components, high-quality assembly and a long service life. It is as a result of prolonged and intensive use that this or that problem may appear. This is due to the development of a part or unit of its own motor resource.

The most common malfunctions of Bosch screwdrivers are:

  • battery failure;
  • failure of the start button;
  • wear of planetary gear parts;
  • damage to the keyless chuck;
  • motor failure.

Battery bank: restoration of primary processes

If the battery bank is not broken, but lags behind by 10% according to the voltmeter readings, you can try to reanimate it. As a result of prolonged use under the influence of high loads, some cans dry out. It is necessary to bring them and their action and restore all processes taking place in the container.

In addition, another option is often used. A hole is drilled in the jar and distilled water is added with a syringe. After that, the element is left for a day. After the specified time has elapsed, the battery is repeatedly discharged and recharged. The hole is covered with silicone.

Another option for returning the operating parameters to the battery is mechanical action on each individual cell. It is easily compressed or deformed. This method does not solve the problem, however, the battery is restored for a while.

Repair of the start button

  • The simplest and most practical way to repair a broken start button of a screwdriver is to completely replace it.
  • After purchasing the original spare part, the battery is dismantled. To do this, unscrew the fastening screws around the perimeter of the case and remove its upper part, gaining access to the button.
  • Now you need to unsolder it from the motor and remove the connector connecting the switch to the power supply.
  • After that, the wires from the electric motor are soldered in place, and the new button is installed in the case along with the connector.
  • Then you need to test the operation of the tool and assemble the body.

Battery bank: troubleshooting

It is not difficult to identify battery damage. It is enough to measure its voltage after fully charged. The voltage on one cell is 1.3 volts. the voltage of a fully charged battery of 12 cells should correspond to 15.6-15.7 volts. If the voltage is insufficient, this is a signal for further battery check:

  • To do this, unscrew the screws on the case and take out the cassette with cans.
  • Visually inspect galvanic cells for oxidation and degradation.
  • Then you need to measure the voltage on each bank. If one or more voltage is absent, then they must be replaced immediately.
  • Armed with a soldering iron, it is necessary to remove everything that can prevent you from removing the punched can: the positive wire and the temperature sensor. It is better to insulate the power cable to avoid short circuit.
  • Now you need to disconnect the plates welded to the battery, align them for a more reliable contact.
  • After that, you need to tin the contacts. To reduce the heating time and temperature, it is advisable to use flux Ф38м. It is applied in a small amount to the contact plate and liquid solder is added. Spreading over the surface, it tinns the contact. This must be done on both sides of the upper and lower contact plates.
  • After that, you need to prepare the battery bank itself. Apply flux in the place of its contact with the contact. The plate with the heated solder must be pressed against the jar in the upper end. And the same must be done with the lower contact.
  • After that, it is necessary to restore the temperature sensor and the positive contact. Then proceed with the assembly of the repaired battery.

DIY Bosch screwdriver repair

Manual installation of fasteners has always been a laborious and painstaking task. Therefore, space technologies very quickly found their application in terrestrial conditions. The screwdriver has become the most demanded tool in almost every household. But the simplicity of design and reliability of the tool does not make the mechanism invulnerable.

During operation, a number of problems arise that can be eliminated independently or contact the employees of service centers.

Removing the keyless chuck

Another component that requires close attention is the keyless chuck. It happens that he also fails. Repair consists in replacing it. To remove the quick-release device, you need to unscrew the screw inside the chuck. Please note that the screw is left-handed, so it must be unscrewed by turning clockwise.

Then a hex key is inserted into the chuck with the short side, clamped and pulled off the thread with a sharp hammer blow. After that, it is unscrewed on the thread by hand. She is ordinary, right.

After reading the article, we can conclude that the best screwdrivers for use in the household are tools made by Bosch. They practically do not fail. Their main problem is regular wear and tear due to long-term operation or negligence.