How to restore the screwdriver battery and its capacity? Is it possible to restore the screwdriver battery?

Screwdriver is a tool in the household, but time comes and its energy source - the battery stops working. Models are constantly changing and finding the right battery can sometimes fail. However, you can completely restore it or extend the service life by 2-3 years. This article tells how to repair a screwdriver battery.

Battery disassembly

Solving the question of whether it is possible to restore a screwdriver battery, we must, first of all, understand how to extract elements from it. The battery is housed in a plastic housing of two halves. First, unscrew the connecting screws. If the connection is made with glue, then you have to tinker with a screwdriver or chisel. Disassemble should be carefully, so that you can then seal the case again.

Inside there are elements connected in series. In some designs, a parallel-serial connection is used.

Substitution of elements

Solving the problem of how to restore a screwdriver battery, it is necessary, first of all, to identify faulty banks that spoil his work. If the battery has sat down, it needs to be charged, and then to check up pressure on all elements. It should not differ from the nominal by more than 10%.

Repair is how to restore the battery capacity of the screwdriver as a whole. It affects the health of each element. It must have a given capacity, which is understood as the ability to feed the load connected to it. Sometimes it is better to replace the failed components, which are quickly discharged. They can be detected by corrosion damage or the presence of characteristic traces of electrolyte on the surface.
One or two elements can be a serious obstacle in the work of the entire line.

If the battery is used for more than 3 years, then most of the elements can be faulty. In this case, it is better to replace them all. It is important that they are suitable for voltage and size. The cost of accumulators collected separately is lower than the new ones.

The serviceability of each can is checked by the value of the internal resistance, which should be about 0.06 Ohm. To do this, a load is connected to it (a resistor of 5-10 ohms) and the current and voltage are determined. It is convenient to use low voltage incandescent lamps. Measurements are made with two different resistances, respectively 30% and 70% of the permissible load. From the 1st voltage, the 2nd is subtracted, and the 2nd voltage is the 1st. Then the results of the subtraction are divided and, in accordance with Ohm's law, we find the internal resistance of the battery.

The battery is often sold complete with a spare. From two it is possible to collect one and still there will be banks in a stock. It is desirable to use them somewhere as power sources, for example, for a flashlight with a car lamp.

After the diagnostics, the checked items are collected in a line. The assembled kit must be welded in the same order. The can body has a negative polarity, and the middle bar is positive. Then, without assembling the battery, you should connect a charger to it. It is necessary to control the temperature of the elements. If they are in good order, then there should not be excessive overheating. After the charging time has expired, and also after a day, the voltage should be measured on each element. If any battery "sits down" by more than 10%, it needs to be replaced with a new one. After the battery passes the test, you can assemble its case completely. Screws of fastening are screwed on the places accordingly to the sizes, and as glue acetate-acrylate ("Super-glue") is applied. With a competent selection of items, the battery will serve as a new one. After charging it should be subjected to intensive training, creating the maximum load of a screwdriver, until it is discharged. Such cycles should be repeated 2 more times, and then - 1 time per quarter.

Restoring cans

Not tested batteries should not be rushed to throw. The main reason for their failure is the evaporation of water through a rubber band located between the body and the middle tire. When it is full "zero", the battery is briefly charged with a 12 V voltage impulse through a resistance of 40-50 ohms. It should be checked that the case does not overheat. If after that, there is still no voltage on it, the jar can be discarded.

To restore the electrolyte, some craftsmen in the side groove of all battery cells drill mini holes under the syringe needle. Then the jars are filled with distilled water. After the batteries have to lie down for a day. The battery is then "trained", charged and checked by the voltage on each cell. The holes are sealed with silicone.

How to repair a screwdriver battery

The batteries inside all look similar. They consist of successively welded cans. The result is the total battery voltage at the output contacts. The elements use the following types:

• Ni-Cd (nickel-cadmium, U = 1.2 V).
• Ni-MH (nickel-metal-hydride, U = 1.2 V).
• Li-Ion (lithium-ion, U = 3.6V).

Accumulator screwdriver "Interskol"

Screwdriver "Interskol" is one of the most popular, due to its versatility. In addition to the main function, it can also serve as a drill. Batteries in it can be any of all common. Nickel-cadmium and metal-hydride are used more often, as cheaper and more powerful ones. In order for them to work reliably, they should be discharged to the end and charged to fully utilize the charge. Otherwise, the life of the equipment is significantly reduced. The reversible loss of the capacity of the element with incomplete discharge and charging is called a memory effect.

Lithium-ion batteries do not have this disadvantage, but they have a much higher price. During work, when every minute counts, it often requires a small recharging to maintain the required power of the screwdriver. Here, these batteries are irreplaceable, because their capacity can be quickly restored.

The customer selects the battery of the screwdriver "Interskol" independently, depending on the preferences, capabilities and required work. In most cases, nickel-cadmium batteries are used.

How to restore the battery of the screwdriver "Interskol", if it has not been used for a long time? When operating, you must try to ensure that the voltage drops to zero is not there. For a 1.2 V discharge, the discharge is up to 0.9 V. If the battery is completely discharged during long storage, the charger may not "see" it. It is necessary to "push" the battery with another, more powerful source of current, so that a small voltage appears on it. After that, you can connect it to a standard charger.

Recovery battery screwdriver "Makita"

Before you restore the battery of the Makita screwdriver, first you need to disassemble its case. It consists of 2 halves, connected by glue. If you carefully tap the battery case with a rubber mallet, the adhesive will fall behind. In some places there may be problems with disassembly. There may need to be an additional hand tool. Next, disconnect the halves of the housing, holding the screwdriver terminals.

According to the operating characteristics, the drill-screwdriver "Makita" is approaching the network tool. The autonomous power supply is provided by 2 replaceable Li-Ion batteries. Computer charging technology allows them to recover in just 22 minutes. At the same time, the battery life is significantly increased.

Defective banks should be replaced with similar new models. If they are difficult to find on sale, it is necessary to collect one of two accumulators. Factory welding can be contact, and during repair it is necessary to create a connection by soldering.

How to repair a Bosch screwdriver battery

Bosch screwdrivers are great for unprofessional applications. They have accumulators with Ni-Cd elements. They withstand large currents of load, but quickly self-discharging (3-4 weeks). At least 1 time per month, they must be restored in order not to fail. In addition, in the process of operation, unbalance of the elements occurs and over time the capacity is lost.

One way to recover is to disassemble the enclosure and "train" each element separately. If this helps a little, some of them will have to be replaced. Then the battery will last a long time.

Repairing the Hitachi Screwdriver Battery

How to repair a Hitachi screwdriver battery? Both Ni-Cd batteries must be charged, after which they should be disassembled and the voltage measured on each bank with a load of 1.5 ohms. Elements showing a lower voltage can be discarded, and from the whole, one good battery can be assembled. Only 1 or 2 can damage the battery. How to restore the battery of the Hitachi screwdriver, as well as all other models, depends, first of all, on the type of elements installed in them.

Recovering the Aeg screwdriver battery

Comes with a screwdriver 2 batteries are sold on Li-Ion elements. If one of them does not charge, this does not mean its malfunction. It is possible that it is too much discharged. To do this, you can try to "train" the battery by applying a pulsed voltage to it, and then put it on charge. The easiest way is to connect for a few seconds to a charged battery.

After the recovery of the Aeg screwdriver battery in the above way failed, its case should be disassembled and checked by each jar.

Recommendations for battery maintenance

1. If the battery has not been used, it should be discharged once a month by the permissible load and recharged again.
2. It is advisable to buy a screwdriver with two batteries in the kit.
3. Screwdrivers must be stored and used in conditions that prevent moisture from entering.

Conclusion

How to restore a screwdriver battery? There are several ways. Before disassembling it, we must try to find the cause of the malfunction, which can also be a mechanism or a charger. Observing the rules of battery operation, stated in the instruction, it is possible to significantly extend the life of the battery.