How To Disassemble The Elti 18 Volt Screwdriver

Batteries 18 volts for a household screwdriver Batteries for a household screwdriver 18 volts: what are there, what advantages and disadvantages they have, how they differ from each other.

Benefits

If we talk about the advantages inherent in such batteries, then we highlight the following as the main ones:

  • High specific capacity. According to this indicator, the battery almost twice surpass nickel-cadmium products;
  • Compact size and light weight;
  • High electrical density;
  • No memory effect.

Varieties of batteries for screwdrivers

Before talking about which battery will be suitable for this tool, you need to decide for yourself whether you need it at all. If you realize the need for it and are determined to purchase a battery-powered screwdriver, then you should know what type of battery it can be equipped with.

It is worth saying that the purchase of a cordless screwdriver allows the owner to solve a lot of problems.

  • If there is no electricity on the site, then you can safely work with this tool, since the presence of an electrical network for it is not the main condition for use.
  • When working with such a tool, there is no need to use power cables. You do not have to connect various extension cords to it, which are often an obstacle to the normal performance of various operations.

But in order for the battery to provide the convenience of working with the tool, it is necessary to choose the right product. Particular attention should be paid to operational and technical characteristics batteries.

It is worth saying that modern models of screwdrivers can be equipped with various types of batteries:

  • Nickel-cadmium;
  • Nickel metal hydride;
  • Lithium-ion;
  • Lithium polymer.

Note that the latter is rarely used in a power tool due to the high price of such 18 volt batteries. However, manufacturers are actively working on the introduction of such batteries in relation to screwdrivers.

When choosing a battery for a screwdriver, first of all, you need to take into account:

  • Frequency of tool operation;
  • Financial opportunities.

Compared to lithium batteries, they are even cheaper. However, many refuse to purchase such batteries, because of their characteristic feature: they have a so-called memory effect. If, when using a screwdriver equipped with such a product, do not follow the rules for charging and discharging the battery, then its capacity decreases until it is completely depleted.

Another type of battery is nickel metal hydride. It should be noted that the disadvantages inherent in batteries of the first type are minimized. They also have a memory effect, however, it is less pronounced. One of the features of these batteries is their increased capacity.

The disadvantages inherent in the first two types are absent in lithium-ion batteries. However, they have their drawbacks. Experts do not recommend discharging them completely when using them. Also, do not overcharge them. The consequence of such actions can be a breakdown of the battery, which is often accompanied by an explosion. However, in modern models of cordless tools uses advanced batteries, thanks to which the risk of such unpleasant phenomena is excluded from them.

For domestic needs, experts recommend using nickel-metal hydride batteries. Their main advantage is their low price. If a breakdown occurs, then you can restore the battery’s performance with your own hands by soldering them. You can also purchase modern charger, which will get rid of all the disadvantages inherent in such a battery.

To make the right choice in favor of a battery for your screwdriver, you must first familiarize yourself with the advantages and disadvantages of each type of product, and then make a final decision.

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Disadvantages

Any type of battery has disadvantages. If we talk in relation to these, then they have the following:

  • Large dimensions and substantial weight;
  • The presence of a pronounced memory effect.

Nickel-cadmium batteries have another problem. The thing is that there is a high probability that the popularity of these products will soon come to naught. The main reason for this is that cadmium is a toxic material. In addition, such batteries must be disposed of in a special manner. The procedure itself is quite expensive. As for everything else, such batteries simply do not have any competitors.

By using a nickel-cadmium battery for your tool, you can ensure efficient operation in the following situations:

  • Reliable operation of the device is required;
  • The user wishes to purchase a battery with a long service life, which is able to withstand more than one thousand charge and discharge cycles;
  • It is necessary that the storage period of the battery is long;
  • Performing work requires the use of large charging currents;
  • The work will have to be carried out in difficult operating conditions;
  • Often there is a need to perform work in low temperature conditions;
  • Requires a battery that is able to maintain the voltage at a stable level throughout its life.

Thus, similar batteries are an excellent choice for not only screwdrivers, but also for any power tool.

Disadvantages

Any type of battery has disadvantages. If we talk in relation to these, then they have the following:

  • Large dimensions and substantial weight;
  • The presence of a pronounced memory effect.

Nickel-cadmium batteries have another problem. The thing is that there is a high probability that the popularity of these products will soon come to naught. The main reason for this is that cadmium is a toxic material. In addition, such batteries must be disposed of in a special manner. The procedure itself is quite expensive. As for everything else, such batteries simply do not have any competitors.

By using a nickel-cadmium battery for your tool, you can ensure efficient operation in the following situations:

  • Reliable operation of the device is required;
  • The user wishes to purchase a battery with a long service life, which is able to withstand more than one thousand charge and discharge cycles;
  • It is necessary that the storage period of the battery is long;
  • Performing work requires the use of large charging currents;
  • The work will have to be carried out in difficult operating conditions;
  • Often there is a need to perform work in low temperature conditions;
  • Requires a battery that is able to maintain the voltage at a stable level throughout its life.

Thus, similar batteries are an excellent choice for not only screwdrivers, but also for any power tool.

Lithium polymer

This state-of-the-art power tool battery uses lithium-ion technology. Them the cost is quite high, therefore, they are extremely rare in household power tools. Their main difference from lithium-ion batteries is that they use a gel polymer instead of a traditional electrolyte. Its use allowed the manufacturers of these products to increase the battery capacity, as well as get rid of the restrictions regarding the shape of the product body. In addition, such batteries are less explosive.

Varieties of batteries for screwdrivers

Before talking about which battery will be suitable for this tool, you need to decide for yourself whether you need it at all. If you realize the need for it and are determined to purchase a battery-powered screwdriver, then you should know what type of battery it can be equipped with.

It is worth saying that the purchase of a cordless screwdriver allows the owner to solve a lot of problems.

  • If there is no electricity on the site, then you can safely work with this tool, since the presence of an electrical network for it is not the main condition for use.
  • When working with such a tool, there is no need to use power cables. You do not have to connect various extension cords to it, which are often an obstacle to the normal performance of various operations.
Read more:  Remaking a Screwdriver 18 Volt On Lithium

But in order for the battery to provide the convenience of working with the tool, it is necessary to choose the right product. Particular attention should be paid to operational and technical characteristics batteries.

It is worth saying that modern models of screwdrivers can be equipped with various types of batteries:

  • Nickel-cadmium;
  • Nickel metal hydride;
  • Lithium-ion;
  • Lithium polymer.

Note that the latter is rarely used in a power tool due to the high price of such 18 volt batteries. However, manufacturers are actively working on the introduction of such batteries in relation to screwdrivers.

When choosing a battery for a screwdriver, first of all, you need to take into account:

  • Frequency of tool operation;
  • Financial opportunities.

Compared to lithium batteries, they are even cheaper. However, many refuse to purchase such batteries, because of their characteristic feature: they have a so-called memory effect. If, when using a screwdriver equipped with such a product, do not follow the rules for charging and discharging the battery, then its capacity decreases until it is completely depleted.

Another type of battery is nickel metal hydride. It should be noted that the disadvantages inherent in batteries of the first type are minimized. They also have a memory effect, however, it is less pronounced. One of the features of these batteries is their increased capacity.

The disadvantages inherent in the first two types are absent in lithium-ion batteries. However, they have their drawbacks. Experts do not recommend discharging them completely when using them. Also, do not overcharge them. The consequence of such actions can be a breakdown of the battery, which is often accompanied by an explosion. However, in modern models of cordless tools uses advanced batteries, thanks to which the risk of such unpleasant phenomena is excluded from them.

For domestic needs, experts recommend using nickel-metal hydride batteries. Their main advantage is their low price. If a breakdown occurs, then you can restore the battery’s performance with your own hands by soldering them. You can also purchase modern charger, which will get rid of all the disadvantages inherent in such a battery.

To make the right choice in favor of a battery for your screwdriver, you must first familiarize yourself with the advantages and disadvantages of each type of product, and then make a final decision.

How to make a power supply for an 18v screwdriver with your own hands instructions and diagrams

Any household tool that can function autonomously has a significant drawback. Maintaining a battery in a normal state is troublesome, during operation it requires regular charging, the shelf life is limited, and the cost of such a power source is such that acquiring a new one is quite expensive.

And it will not always be possible to find it, especially if the screwdriver is of an old modification. The conclusion suggests itself to make a do-it-yourself power supply for an 18 volt screwdriver.

The most rational solution is to pick up components or remake an existing power supply from any technical device. This can be done with your own hands, without outside help.

What to look for:

  • Dimensions Ideally, when the finished power supply is placed in a plastic case from a standard battery. No problems while working with a screwdriver.
  • Current limit. If this parameter is not taken into account, then the proper torque cannot be achieved. You can clarify the value according to the certificate of the screwdriver. In the absence thereof, the battery with which it was equipped. As a rule, the current is selected approximately 1.6 (± 0.2) times higher than the capacity (in A / h) of the battery.
  • Output voltage. It is worth considering that when the load is connected with some power supplies, it may drop by 1 2 V. To use an electric / tool it is not essential, but you should know.
  • PSU type. According to experts and practitioners, the best option for a power supply for a screwdriver is impulse. The absence of a power transformer in the circuit reduces the weight of the product and reduces its dimensions. These are the most compact of all PSUs.
Read more:  How to Make a Charger for a Screwdriver

Having acquired a block, it remains only to remake the box in which the battery was placed. This is the only thing that even an amateur can do with his own hands.

  1. First. Drill a hole in the plastic (as easy as shelling pears), lead the power wire (cord) inside the case and connect (solder) to the power supply terminals. The most optimal option.
  2. Second. Install a semiconductor diode of appropriate power in the conductor, the cathode of which is towards the electric / motor of the screwdriver.
how to disassemble the elti 18 volt screwdriver

For those who have the skills to work with a soldering iron and a multimeter, folk craftsmen offer so many schemes that it will not be difficult to choose something suitable. Here are just a few of the easy-to-make list:

  • Power supplies are universal.
  • Based on two- and three-pole resistors.
  • Pulse.
  • With filters.
  • Blocks with a gain circuit and a number of others.

What do they overwhelmingly have in common? In addition to pulse modifications, a step-down transformer, since we are talking about a secondary (supplying for a screwdriver) voltage of 18 V. This is the main difficulty. You can pick up Tr, but, unfortunately, not all parameters of radio components are indicated on the diagrams. If the resistance value is indicated, then the power is not indicated; not all types of semiconductors are indicated and the like. And on the information transformer, there is practically no cross-section of wires, the number of turns, and so on. Therefore, the calculations will have to be done by yourself.

But even a transformer can be made with your own hands, with the skill and desire. For example, take it from an old PC’s power supply. The main thing is to meet the basic requirements specified above. There may be some differences depending on the modification of the computer. You can also use part of the LED lamp dimmer circuit. There are other options as well.

But all this time the experience of self-constructing theoretical knowledge. So it turns out that it is much easier and faster to purchase a power supply and / or alter it, adapting it to work with a screwdriver. All other options for a person who are with an electrician / electronics on you are hardly acceptable, even if there is a diagram and its description. After all, you will also have to poison the board to accommodate all radio components, how many people know how to do this?

It remains to add that the decision to switch to power supply from a power supply has a significant drawback of being tied to an outlet. But how relevant is this for a household screwdriver? And the advantages are enough torque stability, the ability to breathe a second life into a tool for which it is impossible to find batteries, and no maintenance of the power source. And from what it can be made, what are the options, it is described in some detail.