How to charge a Metabo electric screwdriver

Methods of charging an electric screwdriver battery without chargers

The charger included in the electric screwdriver kit is considered the most durable device in the kit. There are different cases when the charger failed unexpectedly or just lost. There is no big problem with buying a new one, but sometimes the situation is urgent and you need to charge a dead screwdriver battery without the original charger. Or downtime is unacceptable, and the charger was purchased through the Internet. here the delivery time may take several days. In such cases, you can try alternative devices to recharge the battery.

The controller when charging the battery is not the main component. But very important. It supports power replenishment modes and prevents overcharging (and sometimes overheating), it can automatically perform training cycles, measure battery parameters. These modes are different for each of the three types of batteries used in electric screwdrivers:

The battery’s service life is shortened if the prescribed modes are not followed, so it is not possible to use the battery’s full capacity. In the absence of the controller, you will have to regulate the output parameters of the power supply by yourself during the whole process.

Metabo powermaxx bs. the coolest screwdriver under 5 meters!

Why choose this particular electric screwdriver?This is a very successful model, which has been produced for many years and has already become legendary. In this particular screwdriver there is a combination of good design, build quality, reliability and affordability.Metabo (Metabo). German brand, one of the top 10 manufacturers of cordless tools. Since 1924. produce professional electric tools, pneumatic tools, woodworking machines, pumping equipment and other equipment.The main advantages of this model: 1. Good QUALITY-price ratio.2. High enough power, with very compact size and low weight.3. The detachable chuck further improves the power-size-weight ratio.4. All modern tricks of a high-class tool: backlight, discharge indicator, overload protection system, charge balancing plates, spindle lock, removable belt clip.5. Two 2 Ah batteries included, huge carrying case and compact charger.6. This is one of the few 12 volt models that has the ability to install more powerful batteries.7. Very good warranty support from the manufacturer. Free shipping service for defective tools.

A separate mention must be made of the warranty.Metabo gives you the option of extending the regular one-year warranty to three years.When purchasing the tool through official channels (stores, dealers), you can register your purchase on the Metabo and get a certificate for extended warranty for THREE YEARS. That said, the warranty also covers the batteries.Disadvantages.The main drawback most often cited by users is the thick handle, which is not very comfortable for people with small hands. over, the handle expands towards the bottom, just in the little finger area, excluding the fifth finger from a complete grip. This is due to the design, as with most similar screwdrivers, the battery consists of three finger-sized 18650 batteries, which have a standard unchanging size and are inserted inside the handle.I can speak from experience. I have had and have had screwdrivers from various manufacturers, including some of the top-of-the-line. I’ve had thin grips with battery sliders that insert under the handle and with these “thick” grips that have a battery inserted inside. And my brush is not a large size. My opinion is this:The thickness of the handle at the bottom, is very important for high-powered screwdrivers 18-20 volts. Where there is very much torque, the weight and size of the screwdriver and the batteries themselves are much greater. There, yes, the strength and quality of the grip makes a big difference.But, for compact, light 12V screwdrivers, grip strength isn’t as important. The tool is held firmly enough with four main fingers.competitors:Among the classmates, manufacturers from the top 10, the closest competitors to this model only two.Makita DT333 and Bosch GSR120. Both lose out on maximum power, just over 10% and the lack of the ability to use without a chuck.Makita has a more convenient handle. Just because of the battery mounting system of the slider type (from below). But, it adds height and weight to an electric screwdriver.Bosch’s is very close and similar to the PoverMax. But, no quick-release chuck. Less power. And usually for the same money a 1.5Ah battery is included.

Revitalizing a nickel-cadmium battery

Screwdrivers with nickel-cadmium batteries are practically a thing of the past. But they are still sold, meet and even work, because the Ni-Cd cells can “live” up to 20-25 years, although they withstand about 900 cycles “charge/discharge”. Another feature of Ni-Cd batteries is that they can be stored in a discharged state. So if you found in the attic of your grandfather’s electric screwdriver with Ni-Cd battery, it makes sense to try to revive it.

Let’s try to charge a battery. Any charger able to supply the necessary voltage and current equal to half of the battery capacity will do.

This is the normal charging current for Ni-Cd cells. They can easily handle a current equal to their capacity, or even twice that.

Switching on, trying to charge. If the battery takes a charge, then continue. If not, and it has a hollow zero, go to plan “G” and “P” (see the diagram below). below).

Once the voltage of the battery reaches 1 V, it can be stored in a discharged state.37 V multiplied by the number of batteries, stop the process. But this is not all. It is not certain that the battery is fully charged. Nickel-cadmium batteries suffer from the so-called memory effect. If they are constantly discharged, say, up to 60% and then put on charge, they will get used to this and then refuse to work when discharged at the same 60%. So let’s discharge our battery with about the same current we used to charge it with. Let’s discharge to the value of 1 V, multiplied by the number of batteries. You can use car lamps or a screwdriver as a load.

After that, fully charge it again. Repeat the “charge/discharge” operation 3-4 times. Fully charged and try to use the electric screwdriver. If even after all these manipulations battery capacity is significantly lower than the specified, then, unfortunately, we have a decrepit, outdated old man on our hands. It can’t be resuscitated.

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Plan “G,” the pusher

Plan “G” is to “push” the battery in short (0.2-0.3 sec) by high current pulses. And the current should be much (dozens of times) greater than the battery capacity. It is better to “push” each battery separately. Therefore we open the battery, find out where the plus and minus of each battery. As a pusher we will use a car battery, but any other powerful source of 10-15 V will do.

We connect minus of our element to minus of “pusher”, connect one end of the wire to plus of “pusher” and with the other end we touch briefly the plus pin of the Ni-Cd-element. Frequency of touching. 2-3 per second. As a result of such burning the dendrites, which caused the microcircuits, are eliminated and the battery comes to life.

When touching, make sure that the wire is not welded to the battery lead. In general, it is better to touch not the wire, but, say, the head of the screw on which the wire is screwed. And do not forget about the safety glasses!

The operation is carried out within 5-6 seconds. Charge. If the process is started, eliminate the memory effect (see Fig. 1). above). Try to use.

Plan “P”, refill

This plan is effective for the degradation of the electrolyte, because during operation there is an oxidation process with the flow of water. Here is the plan:

  • Make the hole in the shell with the microdrill.
  • Pour 1 cc of distilled water into the hole with a syringe.
  • Wait for an hour, then “push” the element with high current pulses.
  • Charge. We wait 24 hours, then measure the voltage.
  • If the voltage is normal, seal the hole with sealant or solder.
  • If it dropped or the cell did not want to take the charge, go to point 2 and do so until there is nowhere else to pour water.

If it has not helped, you can read the article “How to remake a cordless electric screwdriver to 12 or 18 V mains with their own hands” and “How to make a power supply for an electric screwdriver. Still better than throwing a working tool back into the attic.

We found out how to charge the battery of an electric screwdriver without a native “charger”. Now even if your electric screwdriver’s “charger” fires, sinks, is lost or stolen, you will find a way out.

How to charge a screwdriver’s Li-ion battery and other important rules for using it

  • Li-ion operates optimally in the range of.10 to 45°C. Charge at 10 to 30°C.
  • Every 4 months, do a full discharge/recharge cycle to calibrate the charge level sensor in the battery controllers. That is, discharge to almost 100% and put it on charge for 12 hours.
  • Li-ion should be stored at 40-60% charge. Do not store 100% charged Li-ion batteries, because it will permanently lose 20% of its capacity in 3 months. If stored properly. at 40-60% charge. the Li-ion will irrevocably lose only 1% of its capacity in the same 3 months.
  • If you have two Li-ion screwdrivers, charge one to 40-60% and store it as a backup. Once a month, use it as a worker. charge to 100%, discharge to 40-60% and store again. The second Li-ion is the main working. After a day’s work put it on a recharge at the end of each day, even if it is less than 10% discharged.

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

That’s it. now you know how to charge the li-ion battery of your electric screwdriver.

I gave one to every carpenter, and even hung it up in the shop on the bulletin board.

And here’s another question. why I switched from Ni-cd to Li-ion cordless screwdrivers?

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

  • at least 2 times higher specific capacity;
  • the self-discharge is several times less;
  • No memory effect, which gives the possibility of recharging at any time;
  • withstands on average twice as many charge-discharge cycles, which means it will last twice as long.
  • Li-ion is subject to aging. Well, are Ni-cd batteries eternal or what?? Also age.
  • Li-ion has low resistance to low temperatures. It’s all in the past. Now they make a Li-ion battery so that it will work even with the battery’s six ounces.10 ° C for sure. And some sources indicate that even at.30°C can work;
  • Li-ion batteries only require the use of an original charger. What’s the big deal?? All electric screwdrivers are sold with their original charger.
  • Li-ion has a high cost. I wouldn’t say that. Went to the store the other day. Ni-cd batteries under 1 t.р. have not seen. And you can buy a whole electric screwdriver on AliExpress with Li-ion for 3 tons.р.

And finally, if you work with an electric screwdriver professionally. do not hesitate. it will collapse simultaneously with the Li-ion battery. So you probably don’t need to buy a separate Li-ion battery.

Just with a reasonable non-vandal use for a couple of years should suffice electric screwdriver.

And, yes, one more important rule of thumb. Do not skimp on the power of your electric screwdriver. It corresponds to the voltage of the battery. Get one with a 20 volt minimum Li-ion battery. It will spin like an animal.

And buy a weak one. it will be of little use, and the joy of penny savings will not be too.

I actually got some screwdrivers with 25 volt Li-ion batteries. Carpenters can’t get enough of it. Especially after a 14 volt Ni-cd.

That’s pretty much it. There are still questions, do not agree with something. write in Комментарии и мнения владельцев.

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charge, metabo, electric, screwdriver

Recommendations for battery storage

It is a good idea to store all types of batteries when you disconnect them from your electric screwdriver. Each battery type also has its own unique characteristics in this regard:

  • Nickel-cadmium batteries should be discharged before storage to the extent that the electric screwdriver does not operate at its full capacity;
  • nickel-metal hydride batteries are recommended to be kept fully charged, but a slight discharge is still allowed;
  • lithium-ion batteries also need to be discharged before storing, but only halfway.
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Makita DF012D Electric Screwdriver Review

After a long period of storage rechargeable Ni-MH batteries, capable of 200 to 300 recharge cycles without loss of capacity, must be recharged within a day. Units of this type have a significant self-discharge characteristic.

as mentioned above, lithium-ion batteries do not have a “memory effect. They have a high capacity and the lowest self-discharge rate. They can be recharged at any time, regardless of the degree of discharge.

Li-Ion batteries should not be completely discharged because the built-in electronic safety system may be deactivated by a rise in temperature or voltage.

Lithium-ion batteries need to be charged from near zero for a period of about 65% of the time it takes to reach 50% of the charge required for proper storage.

Following the simplest recommendations for storage and charging of the different types of accumulator packs will allow to use all the resource of batteries, put into them by the manufacturers.

What to do if it won’t charge

If there is no battery charge, there may be the following reasons:

  • Charger malfunction.
  • No contact between battery and charger.
  • Faulty safety sensor.
  • Residual capacity is very low.
  • Failure of individual battery cells.
charge, metabo, electric, screwdriver

Serviceability of the charger can be checked with a voltmeter or other battery.

Batteries and chargers have 3 or more contacts. Additional contacts provide connection to the protection sensor(s) located in the battery. For nickel cells, this is a thermostat switch. If the battery reaches a temperature over 4050° C, this is a sign of malfunction. the thermostat switches off the charger. The thermostat switch must be in the closed position. If it is open all the time, that is a sign of malfunction. You can short-circuit the “T” contact to the “minus” of the battery and charge without the overheat protection. But you will need to monitor the temperature of the battery and turn it off if the temperature is above 40 o. Lithium batteries can have a whole integrated circuit with many protection elements. Not only the temperature of the cells is monitored, but also the state of charge of each cell.

Single cell failure is indicated by the voltage of the charged battery. Even a battery that has no capacity must be charged to its nominal voltage. If the rated voltage is matched, then all cells have some capacity and deliver a voltage close to the rated. Conduct training cycles: if the capacity increases, the battery is recoverable. Continue training cycles until charge and discharge times no longer increase.

When the voltage of a charged battery is a multiple of the voltage of 1 cell, there is a high probability of failure of the individual battery cells from which it is assembled. take the battery apart and test each cell. Faulty ones are removed and serviceable ones are soldered in their place. Two defective batteries can be assembled from one of the remaining serviceable cells.

Types of chargers

Included with a screwdriver is one or two batteries with a battery charger. There is a trend among power tool manufacturers to sell their products without batteries. This marketing trick makes the buyers buy the models of the producers that they already have in their arsenal. In any case, if a battery is purchased, even separately, a battery charger can be included. It’s also a matter of mechanical design. one manufacturer’s charger probably won’t work with another manufacturer’s battery charger.

The energy-recharger is almost always optimized for a given type of battery, charges it at the most favorable current rate, and stops charging automatically at the end of the process. That’s why when you buy a charger and batteries of one manufacturer you can not think about compatibility if the charger is designed for the same manufacturer and type of battery.

In most cases, chargers are sold as pulse-reversers. But for nickel cadmium batteries there are chargers that are considered to be professional (at a reasonable cost). They are called pulse-reversing. For every positive pulse they give out a small amplitude negative pulse. This eliminates the memory effect inherent to Ni Cd batteries and maintains their capacity.

Overview and balance in Metabo Li-ion 14.4v 2.0Ah

In general, the idea of adding a balancing slot in the battery was floating around for a long time, but never got around to it.Well, here we are, at the same time let’s see what’s what inside, and maybe it is not necessary )) The screwdriver is very good, I liked almost everything.

charge, metabo, electric, screwdriver

Bought it to replace the old Metabo BSZ 12 impulses, which served me faithfully for a number of years. The reason for the death, quite natural death by the way was the native Ni-Cd battery. At first I had the two batteries and out of the 20 cans I selected the 10 ones that were more or less survivable. Didn’t last long. Then I went to Mitino Radio Market and bought 10 new batteries. Lasted a couple more years. So it was probably time to change it to something newer and I bought the Metabo BS 14.4 as you can see from the numbers it is on Li-ion batteries, a capacity of 2 amp hours. All in all a great screwdriver, much lighter than the old BSZ.Old BSZ 12 is better in two ways than the new 14.4, first of all it has 52 Hm torque compared to 40 Hm for the new 14.4 (although there is a version of 14.4 LT with 50 Hm torque).And secondly, the old Metabo chuck was 13mm, and the new chuck is only 10mm, not critical, but still sometimes convenient when you can just take a drill 13mm and insert it into the screwdriver, and not look in the store for a drill with a 10mm shank.The battery itself is pretty regular

The housing is made of two halves on self tapping screws, you need a T10 screwdriver to unscrew, one self tapping screw is covered with a plastic seal. And this is the only tool you need for assembly and disassembly.Inside everything is also very nice, at least I liked it. As it should be at 14.4 voltage inside 4 lithium batteries, neatly placed in a plastic cage, judging by the markings on the body of the battery pack is Li-ion, but not the newer LiHD.

And at first glance, these two thin wires gave me an idea that the battery assembly already has a balancer and, in principle, you can continue to assemble everything back and not worrying that the dead bank shrink the entire battery.But did I have to turn four screws for nothing ? ))) go ahead.At the end, 4 LEDs and a button for diagnosing the degree of charge are made in the form of a module with the board, you can disconnect it but I think the latches will fly away at once, and I do not think there is anything interesting.

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The printed circuit board is a big one, double sided, made of glass fiber board.At the top of the 5 contacts marked GND, T-, T, D and. All of them have wires.

Nearby is a 3 pin which apparently is used for balancing, but I wonder what’s on the other side of the board.Separate the board from the batteries interfere with the power rails, and if the plus wire still somehow allows you to raise the board, the minus wire consisting of a flat bar allows only a little raise of the board from the side of the plus wire. But it is enough to satisfy your curiosity.

This is already interesting the plus wire, by the way, is made of 2.5 square meters and secured by spot welding.The board from the bottom:

Only two chips, one in SO8 the other in a 14-foot TSOPThe whole board is varnished and it pleased me very much, that’s exactly what you should do all the rest.Not particularly into the wiring, I will make only a superficial examination and voice my thoughts.The 8 leg chip has middle legs connected on both sides which lets us think it is a stabilizer. But a 14 legged chip this is apparently a balancer and at the same time provides four LEDs for charging level indication.In the middle of soldered temperature sensor wrapped in some kind of KPT-8 which rests in the two middle banks.Trying to make out the marking on the 14-foot chip failed, the layer of lacquer is so shiny and masks the engraving, so macro photography came to the rescue. And the 8 leg battery pack is a 78L05 regulator from STMicroelectronics, so it delivers 5 volt at 100mA, hmmm why 5 volt? ? maybe it’s a 14 foot IC ?After about 15 tries to find the right illumination at which the marking can be seen at last a good picture:

PIC16F684 wow this surprised me. Although it is quite predictable at first the MCU allows to provide charge indication, secondly it can replace balancer chip, thirdly you can register to it a lot of useful things, like for example this picture from official trailer:The peak has 10 bit ADC and multiplexer before it with 8 inputs so it can control voltage of all four banks and signal from temperature sensor.

Isn’t it great? ?Important thing is that the MC monitors the battery temperature and charge in each bank and can transmit this information to both the screwdriver and charger, and balance the banks, but whether it does it yet a mystery, to be honest I am too lazy to bother with the circuit design so I just measured all the banks and got 4.36v in each that with 99% probability says that the MC still balances them, and the transistor near the three-pin connector incline me to this thought. And the 78L05 is the power supply for the MC.

Bank by the way to identify identify and could not look like a typical 18650 without protection, the marking in the first line of EBE9RXD, the second line is different. No help from Google or Yandex, but it’s supposed to be 2000mAh high current.There is not much else to do so I just broke out some jumpers in the ventilation hole to hide the balancing plug there

It is neat and does not interfere with anything

Metabo PowerMaxx BS screwdriver

Hello all, decided to share my opinion on this screwdriver.

I’ve been installing kitchen cabinets and drilling with them almost every day for a year and a half. Bought in a set with charger, two batteries in a soft bag, then sold one charger immediately and after a month bag too, 2000r. returned)) Took exactly two, one to drill, the other to twist, saving time and life of an electric screwdriver.

with an electric screwdriver it is possible to work both with a chuck and without a chuck if it is necessary to twist only screws inserting the bit or an extension lead directly into a shaft, inside a shaft there is a magnet, bits do not fall out.

Powerful for its size, very comfortable in the hand, there is a light and you can turn and drill in dark places, and at the slightest press the trigger is lit at the same time that the screwdriver does not rotate, so that in some moments they can just light a little bit although it shines so-so.

The power for its size, screws 4h70 fly thickly so, as pulls the drill fostner 35mm, the core bits on metal 35mm, bimetal core bits from 25 to 105mm, 105-th with difficulty, and only if new but sometimes saves where a great screwdriver does not fit. Artificial stone with a 35mm bit and 12mm drill bit can drill through without straining. In general, the smallest but the most remote.

There are also disadvantages, as with everything. Very unstable if put on the battery especially if a drill or bit is installed in the chuck, so you have to lie down so the screwdriver does not jam into the countertop or laminate. The screwdriver chuck is not fasteners well, I thought it might be defective, but the second chuck turned out to be the same. Tight torque, softer would be better.

In the beginning the battery was enough for one day of assembly, after a year and a half one charge is not enough anymore, it is undercharged. My partner also has one of those, but first he used one to turn and drill, and bought another one a year later. On the whole these are good wrenches for the money, but I decided to go with the other ones, where the torque is smoother and softer.

Hitachi electric screwdriver DB3DL2

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