How much to charge a 12 volt screwdriver battery

What is the optimal amount of time for charging?

Usually, the time it takes to fully charge the battery is reported in the instructions for the screwdriver. It is recommended that you adhere to these guidelines. Often, the memory is equipped with indicators that inform about the completion of the procedure and its end. They will help you figure out how long to keep the battery on charge. After completing the procedure, the battery is removed from the charger so as not to harm it.

Battery chargers are of two types. conventional and impulse. The former are designed for household screwdrivers and charge the battery for 3-7 hours. The latter are used on professional equipment and are able to restore capacity within 1 hour.

How to charge a screwdriver to extend its life?

The battery is an essential element of any cordless screwdriver. It makes the tool standalone and allows you to work in conditions where the use of mains-powered equipment is not possible. Knowing the rules for charging and operating the battery will increase its service life.

Should I charge before long-term storage??

If the device is not used for a long time, it should be wisely stored in order to prevent damage to the batteries.

Nickel-cadmium batteries are discharged before storage, but not completely, but partially, until the power is reduced. Before use, they are completely discharged and charged at least three times.

Nickel-metal hydride batteries are stored fully charged, and before starting to work with the tool, they are kept on charge for at least a day. After the device has passed 200-300 discharge-charge cycles, its capacity may partially decrease.

Lithium-ion batteries must not be fully discharged. this will disable the protective circuit. Keeps batteries up to 50 percent full. The number of discharging and charging cycles is not limited, but the duration of their service is no more than two years.

Nickel metal hydride

These batteries represent a new generation of technology of the previous type, their production and operation are almost completely environmentally friendly. Their memory effect is manifested to a much lesser extent. They have a significant drawback. a high self-charging current. Batteries of this type are stored fully charged, and if they are not used for 30 days, it is recommended to replenish their capacity.

How to properly charge a new battery?

For Nickel Cadmium and Nickel Metal Hydride batteries, initial charging cycles are important to allow them to use their full capacity. Type 1 batteries must be fully discharged and then charged three times to reach their maximum capacity. Then they are charged only fully, the end of this process will be reported by indicators or warming of the case. Batteries of the second type require 4-5 full discharge and charge cycles. Then they are charged as needed, without waiting for a full discharge. However, discharge-charge cycles are regularly repeated 4-5 times to restore capacity.

Lithium ion

Batteries of this type are considered to be the best. They charge quickly, have no memory effect. Such batteries do not need to be fully discharged, and can be connected to the power supply as needed. The disadvantages include the high cost, as well as the fear of low temperatures.

The lithium-ion batteries of the screwdriver should be properly charged at a temperature of 10 to 40 ° C, and if they heat up during this processor, they should be cooled to prevent damage.

Features of charging screwdrivers with different voltages

Batteries for screwdrivers differ in voltage. 12, 14.4 and 18 volts. The chargers supplied with the tool correspond to the battery rating. It is not allowed to charge equipment using a charger with an unsuitable voltage, because this could damage the battery. When buying a new charger, you need to choose a device with the same characteristics as a broken device or purchase a universal one, with the ability to set the required value.

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Features of charging different types of batteries

Several types of batteries are installed in screwdrivers. nickel-metal hydride, nickel-cadmium and lithium-ion. Each has unique features, and charging is carried out taking into account the recommendations for this type.

What voltage and current is harmless to charge a car battery

We decided to write this article when we came across one of the “service centers” for charging the battery. Chargers were. diode bridge transformers. Even more disappointing was the advice on the Internet: “unscrew the cans before charging”, “find a charger supplying voltage 16 V-16.5 V”, “get good gas emission”, “charge for a long time with low currents”.

Do not charge batteries brought from frost, let them warm up indoors for several hours. Also, batteries that are too hot should not be charged. Charging is safest and most efficient at room temperature.

It is practically useless to charge a battery discharged below 8 Volts, most likely one of the cells in it is short-circuited or polarized. A conventional charger will not be able to fully charge a strongly unbalanced battery: the voltage at the current leads will not exceed 12.5-12.6 Volts. Such batteries can only be cured (fully charged) by specialists. It is necessary to charge lagging weak banks separately with a voltage of 2.4 Volts with a current of 0.1 of the capacity of the entire battery in a pulsed mode.

IMPORTANT ! The operating voltages of a modern battery, below which CANNOT be discharged 10.8 V and above which CANNOT be raised when charging 14.4 V.

The 15-16 volt voltage that most cheap Chinese chargers are charged with is a strong boil that destroys the smears on the electrodes with bubbles. The resulting sludge does not fall to the bottom, but remains on the plates, held by the separator envelopes. Access of the electrolyte to the active mass of the electrodes is partially blocked. Capacitance and cold start current drop.

In old battery designs, boiling during charging did not bring such consequences. The sludge fell to the bottom. to its place.

At a charging voltage of 16V, if you do not unscrew the can caps and do not allow gases to escape, the battery will simply swell or crack its case. At normal charging voltage, the cover does not need to be unscrewed. Some batteries simply don’t have them.

IMPORTANT! A defective battery can be detected during charging. A battery that has lost its performance is not capable of accepting charge currents above 1-2 Amperes. The sign of a battery that has died from strong sulfation is as follows: even at low charging currents, the voltage immediately rises to a maximum of 14.4V. The battery voltage (12.7-13 V) gives the impression that it is fully charged. Failure is indicated by a test with a load plug or a car starter. the voltage at the terminals instantly drops, the engine does not start. This sulfation is most likely already irreversible and the battery should be disposed of.

IMPORTANT! Do not apply a current higher than 1/10 of its capacity when charging, too small currents below 1/20 are also useless. For standard 60 Ah batteries, normal charging currents are from 3A to 6A (7-9 Amperes when charging in “current-pause” mode). In the battery, the charge current triggers chemical reactions. The reactions depend on the amount of active mass on the plates and its thickness, the area of ​​the electrodes, the temperature range, and the undesirable process of water electrolysis. A weak current will not charge the entire volume of the electrode spread, but only its uppermost layer. Then the voltage rises to 14V and above, signaling the end of the charge. Water electrolysis starts. It is impossible to continue charging such a battery with a low current, since the electrodes will passivate. the plates will lose the ability to accept normal charge currents at all. If the charge currents are too strong, unwanted chemical reactions will appear in the battery, which, in addition, will proceed too violently and destructively. If the charge current is too high for a particular battery, then due to the action of the “excess current”, abundant release of hydrogen and oxygen from the electrolyte begins. boiling, “gurgling” in cans. Bubbles destroy the layer of smear, and free oxygen oxidizes the lead in the plus plates, turning them into a soft lead oxide, easily destroyed by vibrations, “spongy lead”. In a working battery, when the current is cut off, boiling should stop immediately.

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It is also harmful to store the battery at a constant low float current. If you charge an already charged battery. the positive plates will oxidize and water will “boil off” from the electrolyte. The result will be a battery with corrosive electrodes, weakened bridges and a high self-discharge rate.

The battery charging process must be monitored visually, making sure that the electrolyte does not “boil”, which usually happens at voltages above 14.4V; and using a multimeter, measuring the voltage and charge current. Cheap antimony batteries are always boiling. There will also be bubbles when charging a sulfated battery. A weak charger (1-2 Amperes of current) will not charge even a 60Ah battery. It will certainly raise the NRC of the battery to 12.7V, but it will add a lot of health problems to the battery. In the case of more powerful chargers, the problem of “excess current” and a rapidly growing voltage arises, leading to destructive electrolysis of water for the battery. It is optimal to charge the battery, even with the “old-fashioned” charger plugged into the outlet through a timer in a drip charge mode: after a short supply of current (10-30 sec), turn off the charger for a while (10 sec), then turn it on and off again. Thus, most of the rules are followed when charging the battery. The charge flows with a strong current, the voltage does not rise prematurely, at the moment the charger is turned off, the battery “assimilates” the received charge by chemical processes, the voltage does not rise too quickly, the process of water “boiling” does not occur. Charging can be connected via an electronic timer on-off of the socket, or charge through a homemade multivibrator “blinker”. The simplest blinker is made from a turn relay. Schemes are available on the Internet. The turn-on and turn-off times are adjusted empirically based on the characteristics of the charger and the battery.

It is best to charge the battery with a modern “smart” charger, which has “brains” inside. CPU. Such a charger is capable of picking up currents and charge voltage and can control them.

Charging while maintaining current

Charging the Bosch battery

The charger is set to amperage equal to 10% of the nominal capacity. For example, for a 12 Volt battery with a capacity of 55Ah, a current of 5.5A is required, for 60Ah. 6A. In this case, the current strength must be regularly monitored and adjusted, since it tends to go astray.

Keeping the current at 10% at the end of the charging process produces strong gassing. Therefore, upon reaching 14.4 Volts, the current is reduced by 2 times. For maintenance-free batteries, it is halved again when the voltage shows 15 volts.

Charging the battery without removing it from the car

The methods described above involve charging from an outlet, which usually requires removing the battery. However, charging can also take place under the hood. Modern portable devices, such as CTEK, are compact in size, allowing you to charge a 12V battery under the hood. They can be left overnight so that the battery is in working order in the morning. Such chargers are especially relevant for car owners with calcium batteries.

Charging 6 Volt batteries

6 Volt batteries are often used in:

  • motorcycles, scooters;
  • boats;
  • trade, warehouse, industrial equipment;
  • children’s cars;
  • wheelchairs.

Given the widespread use of 6 Volt batteries, they are produced in a wide range of capacities, they can have both 1.2Ah and 16Ah, or any intermediate value. Charging such batteries with a car charger is problematic. Close control will be required, constant current adjustment. The risk of overheating is high.

The most suitable charger for a 6 Volt battery is an Imax B6 charger or similar. Current 10% of capacity, voltage up to 7.3V.

Charging with conservation voltage

The 12 Volt battery will be charged per day:

Charging voltage, Volt Collected capacity per day,% of nominal
14.4 80 (± 5)%
15 85-90
16 95-97
16.4 one hundred

With a highly discharged battery, the current at the beginning of charging can reach high values, which can lead to battery breakdown, therefore, the indicator is limited to 20A.

As the charge progresses, the current decreases, and at the end tends to zero. This method does not require constant monitoring by the owner. You can control the process one day after the start by measuring the voltage at the terminals. If it is 14.4 (± 0.1) volts, charging is complete. Maintenance-free batteries usually take more than a day to reach this target. On devices with indication, the signal will light up, indicating the end of.

Charging lithium polymer batteries

Lipo 3.8 V is charged by the devices that come with them, or by chargers like Imax B6.

The batteries are charged with a current from 20 to 100% of the nominal capacity. Smaller values ​​are preferable for the battery. The main question is, what voltage does a charged battery show? After dialing 70-80%, charging starts at constant voltage and decreasing current.

Lithium polymer battery

Special devices for Lipo 3.8 V signal the end of charging when 70-80% capacity is reached. A further increase in density provides more infrequent charges, but shortens the life of the battery as a whole.

When charging 3.8 Volt lithium polymer batteries, the charger should read 4.2 Volts. If it is possible to set 4.1 volts, it will take a little longer to charge, but the battery will last much longer.

Charging Calcium Batteries

Charging the calcium battery

Old dry-charged batteries are charged with a 10% current, for them voltages up to 16 volts are permissible. New 12 Volt Ca / Ca batteries fail quickly from such high voltages.

The maximum allowable value for them is 14.4 Volts at a current of 10% of the capacity. Such charging takes longer, but does not shorten the life of the battery.

Find out the charging time of your battery

The 12 Volt battery of the car is charged when the voltage and current indicators in it do not change for 2 hours. For full operation, it is enough to save the parameters for 1 hour. This usually occurs at 16.3 (± 0.1) Volts.

  • Types of batteries used to operate the screwdriver
  • Battery charging features
  • How long does it take to charge the batteries of the screwdriver?
  • Do I need to charge the batteries before storing?
  • What to do if the screwdriver battery does not charge?

Do I need to charge the batteries before storing?

If the cordless tool is not used for a long time, experts advise you to carefully consider the battery cells.

It is recommended to discharge nickel-cadmium batteries before storage, but not to zero, but to the point where the instrument stops working at full capacity. For long-term storage, to restore the capacity of the battery, it is necessary to carry out 3-5 complete cycles of its discharge and charge. During the operation of the tool, it is also advisable to ensure that the battery is not partially discharged before charging, but completely.

Nickel-metal hydride batteries have a higher self-discharge rate than previous cells. They are recommended to be kept charged, and after a long “rest” to charge for about a day. Partial discharge is preferable for this type of battery. Their capacity decreases after 2-3 hundred charge-discharge cycles.

Lithium-ion batteries, which have no memory effect, can be charged at any time, whatever the degree of discharge. These batteries have the lowest self-discharge rate at a high capacity. It is not recommended to fully discharge them, as this may disable the protective circuit. Power tools with such batteries are equipped with control electronics that disconnect the cell from the load when the temperature or voltage rises. It is recommended that these batteries be kept 50 percent charged. The number of charge-discharge cycles does not affect the capacitive characteristics of the cells, however, their life is limited by time and is about two years.

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Types of batteries used to operate the screwdriver

Before purchasing new batteries for the screwdriver, you must carefully study the instructions for the device. The tools required for work can be professional, household and semi-professional. Batteries for them differ from each other in capacity, quality and price.

For certain jobs, certain types of cordless tools are also intended, designed for different loads, therefore, different batteries are needed for them. The higher the power rating of the battery, the longer it can work. For convenience, it is better to have two batteries so that you can recharge the second when working with one. Often a second battery is already included when the instrument is sold.

Various types of batteries can be used for screwdrivers. The most commonly used nickel-cadmium (Ni-Cd) and nickel-metal hydride (Ni-MH), and more recently also lithium-ion (Li-Ion).

The most common of these are nickel-cadmium batteries, which are compact in size, large in capacity and at an affordable price. These batteries can be effectively charged over a thousand times, depending on their design, material purity, operating mode, including correct charging. However, these devices have a so-called memory effect, and if you charge them without waiting for a full discharge, the battery capacity will gradually decrease. In addition, the production of such elements is so toxic that the European Union abandoned it on its territory.

In second place in terms of frequency of use are nickel-metal hydride rechargeable batteries, representing a new generation of similar devices. From an environmental point of view, both the production and disposal of these batteries are practically safe. The advantages of batteries of this type include the fact that they have less pronounced memory effect, and the disadvantages. high self-discharge current. These batteries must be kept charged and fully recharged when not in use for more than a month.

recently, more powerful lithium-ion batteries have been used for cordless tools. They also do not have such a disadvantage as the memory effect, which requires periodic discharge cycles to restore capacity. However, these batteries do not tolerate low temperatures well, and it is undesirable to work with them in cold weather. Despite the fast charge and high capacity, they are not very popular yet, as their price is quite high.


Among power tools, both household and professional, the screwdriver is one of the most demanded. With its help, you can not only twist and screw in self-tapping screws, but also drill holes. Mains-powered tools cannot be used always and everywhere, and the cord interferes with work all the time. Cordless screwdrivers are relieved of these disadvantages. With them, you can move freely and not depend on the presence of an outlet in the room.

An important element of every cordless tool is the battery, which allows you to work with it autonomously. This is very convenient, but sooner or later, each owner of such a power tool faces the question of how to charge the battery of a screwdriver.

How long does it take to charge the batteries of the screwdriver?

As a rule, the charging time of the screwdriver battery is indicated in the instructions for the tool. These recommendations should be carefully followed. Often the charger has a special display system to help you understand how the charging process is going. Thanks to this, you can easily determine with how much to charge the battery of the screwdriver. When charging is complete, you need to interrupt it in time so as not to damage the batteries. On average, the charger battery for a screwdriver can recharge from about half an hour to 7 hours. Practice shows that a Ni-Cd battery with a capacity of 1.2 Ah is charged with a current of 250 mA for about seven hours. Charging current is maintained using the mains adapter.

It should be borne in mind that there are two types of battery chargers. conventional and impulse. A standard conventional charger is more often used in a non-professional tool, it charges the battery in about 3-7 hours. Pulse. more suitable for professional mechanisms. Thanks to it, the battery performance can be restored in a maximum of an hour.

Battery charging features

How to properly charge a screwdriver battery so that it lasts as long as possible?

Batteries need to be charged before using them for the first time as they discharge during storage. In order for the battery capacity of the screwdriver to become the maximum possible for the nickel-cadmium cell, it is recommended to charge it three times and then discharge it. Thus, since the new battery has incomplete capacity, it must be brought to full working capacity. After that, the batteries will need to be charged as soon as their capacity becomes minimum. Lithium-ion batteries are easier to use. They do not have a memory effect, so you can not bring them to full discharge and charge when it is convenient.

When charging, you need to take into account the optimal temperature regime of the process. It is better that the ambient temperature is above ten degrees and does not exceed forty. Batteries sometimes get warm during charging, but this should not be the case, as overheating adversely affects their performance, and they need to be cooled. It is undesirable to leave batteries in the charger. Yes, and it is better to store them by disconnecting them from the screwdriver, separately from the tool itself. If the batteries are not used for a long time, they should be recharged once a month.

It is better to buy rechargeable batteries at specialized points of sale. Correct use will help increase their service life. During operation, it is undesirable to discharge the elements completely until the engine stops. They will need to be charged as indicated by their markedly reduced performance.

What to do if the screwdriver battery does not charge?

If the battery of the screwdriver does not charge, perhaps the reason is to look for its deterioration or in the malfunctioning of the charger. However, often the problem lies in the disruption of contact between the battery terminals of the screwdriver and the charger, as they unbend over time. In this case, you can disassemble the charger and bend its terminals.

Black & Decker 12V Battery and Charger Upgrade Guide

In addition, after some time of use, both the battery contacts and the charger contacts may oxidize and become dirty. Even minor changes of this kind can prevent the batteries from charging properly. This usually translates into a significant reduction in both the charging time and the operating time of the cordless power tool itself. To avoid this, you need to periodically wipe the contacts of the battery, the charger for the battery of the screwdriver and the tool.

Unfortunately, battery cell performance degrades over time. So, with improper use of nickel-cadmium batteries, most often used in household screwdriver models, they quickly lose capacity. Experts sometimes advise to “overclock” such batteries. The battery pack is disassembled and problematic items are identified. After that, they need to be charged. What current to charge the screwdriver battery in this case? Experts recommend that you first charge such elements with a higher current than it should be, then discharge them and charge them again, but with a small current. If the electrolyte has not yet evaporated in Ni-Cd batteries, this “therapy” may help bring them back to life.

In addition, you can restore one battery pack from two that have partially lost their capacity by selecting from them and soldering together whole “banks”. After that, to equalize the charge, it is required to fully charge and discharge the recovered unit several times.

Also, the reason is that the battery does not charge, it may be in the temperature sensor.

Helpful hints

  • Don’t bother if your battery is a lithium-ion type. It is unlikely that you will be able to restore it.
  • A traditional nickel-cadmium battery can always be “pushed” by briefly applying a higher voltage. However, before resorting to such drastic measures, it is necessary to study in more detail this electrical issue of “reincarnation”.
  • You may not know, but the traditional type of battery, which is a nickel-cadmium battery, cannot be connected to charging if its capacities have sufficient energy potential. Otherwise, the destructive consequences of the “memory effect” of the battery simply cannot be avoided.
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How to charge a Li-ion battery of a screwdriver and other important rules for its use

  • Remember —Li — ion is opposite to Ni — Cd!
  • Put Li-ion on charge already with a residual charge of 20-50%.
  • Important! Do not allow Li-ion discharge below 10-20%. This is a critical value. The smaller the discharge, the longer the Li-ion will work.
Depth of discharge Number of charge cycles
one hundred% 500
fifty% 1500
25% 2500
ten% 4700
  • Li-ion works optimally in the range from 10 to 45 ° C. Charge at a temperature of 10 to 30 ° C.
  • Once every 4 months, carry out a full discharge-charge cycle to calibrate the charge level sensor in the battery controllers. That is, discharge to almost 100% and put on charge for 12 hours.
  • You need to store Li-ion at a charge of 40-60%.
    It is impossible to store 100% charged Li-ion, since in this case it will permanently lose 20% of its capacity in 3 months.
    With proper storage. with a charge of 40-60%. Li-ion will irrevocably lose only 1% of its capacity in the same 3 months.
  • If the screwdriver is equipped with two Li-ion, then charge one up to 40-60% and store it as a backup. Use it as a worker once a month. charge to 100%, discharge to 40-60% and store again.
    The second Li-ion is the main worker. Have a job. at the end of each day, put it on recharge, even if it is less than 10% discharged.

Use a backup Li-ion if the main working Li-ion is discharged as a result of intensive work and there is no time to wait for its charging.

That’s all. Now you know how to charge a Li-ion battery for a screwdriver.

I handed this to every carpenter, and even hung it on the notice board in the workshop.

And there may still be a question. why did I switch from Ni-cd to Li-ion cordless screwdrivers?

Here are the advantages of Li-ion batteries over Ni-cd batteries:

  • at least 2 times higher specific capacity;
  • self-discharge is several times less;
  • no memory effect, which makes it possible to recharge at any time;
  • withstands on average twice as many “charge-discharge” cycles, that is, it will live twice as long.
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Are there any disadvantages?

And finally, if you work professionally with a screwdriver. do not hesitate too much. it will crumble at the same time as the Li-ion battery. So you probably won’t have to buy a separate Li-ion battery.

Just with reasonable non-vandal use, a screwdriver should be enough for a couple of years.

12V cordless drill battery cell changing

And, yes, one more important rule. Do not skimp on the power of the screwdriver. It corresponds to the voltage of the battery. Take with a 20 volt Li-ion battery at least. Will twist like a beast.

And buy a weak one. there will be little use from him, and there will be no joy from a penny saving either.

In general, I took screwdrivers with 25 volt Li-ion batteries. The carpenters will not get enough of it. Especially after 14 volt Ni-cd.

Look like that’s it. If you still have questions, do not agree with something. write in the comments.

Restoration of the screwdriver battery. How to restore the battery of a screwdriver

The convenient owner, best of all, realizes how comfortable and effective an autonomously working hand-held power tool is in the process of use. A professional builder, who is mainly engaged in finishing work, is not at all able to do without a screwdriver. Nevertheless, the battery, at the same time of any type, after a certain time loses its own energy potential. The purchase of the newest battery is a very expensive pleasure. Who said that the restoration of a screwdriver battery is unrealistic by and large? What prevents the owner of the brand modification from saving on expensive batteries? Everyone dreams, you won’t be amazed at the versatility of the answer. Ignorance. Developing the topic, we note: this is for you! The material of the article helps to solve the problem of “global aging” of the battery. One has only to read what, as well as what needs to be done.

How much to charge a 12 volt screwdriver


Brought 6 Makitov devices for repair a couple of weeks ago.

4 screwdrivers, 1 jigsaw and 1 sander.

Straight to the box. Severe.

They told me the price of the repair. It turned out that only one screwdriver made economic sense to restore. The rest went to spare parts.

much, charge, volt, screwdriver, battery

In general, by itself the time has come to replace the fleet of hand-held battery tools.

So I bought new screwdrivers with Li-ion batteries for all carpenters at once.

Guys are used to Ni-cd batteries, and Li-ion requires a very different approach. Straight to the opposite.

And, of course, it’s not just about how to charge the Li-ion battery of a screwdriver. If it is not properly discharged and / or stored, there will be little good for it either.

Therefore, I looked at a couple of dozen sites and a couple of hours of video.

Threw out all the husks and made the most “dry” without “water” squeeze.

Screwdriver charging. Repair of the charger of the Interskol 18 V screwdriver. Do it yourself.

Replacing the battery of the C NICd screwdriver with Li-ion. Part 1 in which a little background and the choice of the necessary computers

As you can see, any rechargeable battery is endowed with appropriate features, taking into account which, it will be possible to properly charge the screwdriver.

Features of charging one type or another

The initial charging of the screwdriver is considered a very significant factor, since it depends on it whether the full capacity of the charge becomes active or not. Any type of battery has its own corresponding features of primary recharging. The process of recharging a nickel-cadmium battery is somewhat complicated. How to restore a screwdriver battery and it. First, it must be charged three times in order, and so that the charge capacity remains filled.

Nickel-metal hydride form is recommended to be fully discharged first, not fully charged. The circle of real charging / discharging is repeated 4-5 times, then there is an option to safely charge not to discharge the battery, regardless of the capacity of the capacity.

There are no special rules for lithium-ion, the capacity remains constant for more than one year.

Advice! Do not allow the power source to overheat over 50 degrees.

The recharging period is usually indicated in the annotation of the device. For the most part, the device has a special indicator that helps to understand how long it still needs to charge. When charging is over, disconnect it to avoid destroying the batteries. The average charge for a screwdriver will be from half an hour to 7 hours. Longer period for Ni-Cd 1.3.2 V, 250 mA feed approx. Seven hours.

There are also two types of battery chargers: conventional, non-pulse. In most cases, standard charging is completed with non-professional tools, the charge lasts about 3-7 hours. The impulse device is intended for professional models, it is not able to power the battery for a maximum of 1 hour.

Advice: The Interskol screwdriver has its own versatility, apart from the main function, it is also used as a drill.

The process of replacing an inoperative battery

  • Using a sharp knife (ideally a scalpel) “cut” the contact plates “” and “-” from the malfunctioning container.
  • Using a household soldering iron and fusible solder, add a new capacitive cell to the battery‘s overall “energy strap”.
  • Observe polarity when installing a new container.

Important: do not overheat the case when soldering. Use special acid and catalytic fluxes.

“Banks” that do not store money

Speaking about the restoration of a screwdriver battery, it must be said that the batteries with which the specified construction tool is equipped have different technical properties. Often, this kind of “energy individuality” of the power source plays an important role at the time of operation. For example, with low-temperature operating criteria, preference should be given to nickel-cadmium batteries. Whereas the nickel-metal hydride type of batteries is more durable in the process of use and has a comparatively huge capacity. Although, lithium-ion batteries began to be widely used. The power supply of this type does not need any maintenance at all, it is devoid of the “memory effect”, in. with the highest capacity, the “energy banks” batteries have smaller dimensions than those of “competitors”.