The popularity of rechargeable screwdrivers is constantly growing, it is due to the mobility of devices and ease of operation. Included, as a rule, attached both different batteries and charging devices for screwdrivers. Therefore, it is worth considering the selection, proper operation and repair of equipment.

Types of devices

Two types of charging are used in the equipment kit:

• standard;
• pulse.

For household screwdrivers, basically standard devices are used, which are designed for conventional battery charging. Therefore, the battery is completely filled for 3-6 hours. The second type is designed for professional equipment, thanks to the enhanced operating mode, the pulse chargers for the screwdrivers are able to fill the battery in just 1 hour.

Principle of operation

When connected to the 220V network, the device does not show readiness to work. But for convenience, there are two LEDs in the design - green and red. The first lights up after the replacement battery is inserted, then the equipment is ready for operation.

The "Start" button is also proposed, the pressing of which leads to the closure of the electromagnetic relay. Next is the connection to the network rectifier, the charging process begins. Then, instead of the green LED, the red lights up. When completing the battery filling, the green indicator lights up again, and the electromagnetic relay opens the charge chain.

The duration of the charging process directly depends on two factors:

• the battery capacity extinct ampere clocks. Thus, the standard household models of screwdrivers have a charging capacity of not more than 1.5 years, professional - 2.5 days. With a larger battery capacity, the current current increases, which affects the power of the instrument;
• the battery voltage comprising from 2.4V to 36V. In the screwdrivers usually apply 9V and 12V devices.

Operating rules

Recommendations for the period and frequency of battery charging indicate separately for each model of screwdrivers, you can read in the instructions. To determine the charging steps in devices, indicators are provided, the duration of the functioning process is determined. It is important to interrupt the battery charging process in time to prevent damage to the battery. For example, the battery Ni-CD with a capacity of 1.2 hour requires charging for 7 hours. Permanent current provides a network adapter included in the equipment.

For long-term operation of the battery, it is important to charge it correctly, there are certain rules of work:

• before the first use is charged with a battery, because when stored it loses energy;
• the new Ni-CD battery is incomplete, so it is important when operating the first 3 times completely discharge and charge the battery. Already after such a cycle, the device will ensure the longest service time, subsequently, it is enough to charge with minimal power;
• it is important to take into account the temperature mode of operation, the optimal indicators are from + 10 ° C to + 40 ° C;
• in the charger you can not leave the battery;
• if the battery is not long used, then it is charged 1 time per month.

Often situations occur when the battery does not charge for two main reasons:

• with battery malfunction;
• due to breakdowns of the charger.

In the first case, charging the battery with a lot of current, rather than prescribed in the manual. Next will follow complete discharge and again the charge is already low. Such recharge gives a new life to batteries, subsequently they can still serve for a long time. But this method helps if the electrolyte has not evaporated.

Sometimes the contact between the terminals of the charger and the battery is disturbed, they are simply unfolded during operation. Then it is necessary to disassemble the charging unit and adjust the terminals.

The contacts of the battery and the charging unit can oxidize or contaminated, sufficiently slightly contamination to violate the process. This problem may indicate a decrease in the time of the charging process and the period of operation. To prevent problems, you need to regularly wipe all contacts.

If, when buying a new tool, the defects of the automatic charger for the screwdriver are found, for example, equipment overheating, then you can upgrade it. With voltage drops, the batteries can be slowly charged or overheated, then when replacing the transistor, the situation is corrected. For starters, the equipment disassemble and view the composite elements, you can use a simple scheme of the charger for the screwdriver to be upgraded. According to the current circuit, it goes through the battery, controls with a transistor. In turn affects the indicator readings. Then the current decreases as charging and the LED goes out.

An example of equipment repair can be viewed in the video presented:

Market offers

You can separately buy a charger for a screwdriver, some tool owners are put up for sale used equipment. Also in stores there are separate models in sections of spare parts to the tool. The approximate prices of them are presented in the list:

• charger for Chitachi 12-18V screwdriver, suitable for working with any type of batteries costs about 1000 rubles;
• the original Charger for the Bosch 7.2-18V screwdriver in stores is found at different prices, on average from 800 rubles to 2500 rubles. The presence of automatic shutdown of the equipment when the battery is heated above 45̊С - the feature of these proposals. At the same time, representatives from the professional series are characterized by a high price - about 7.5 thousand rubles;
• the Universal Charger for the Makita screwdriver automatically selects the required charge voltage from 7.2 to 14.4V, the process of process and defective batteries are shown on the control panel. The cost of models of this type begins from 2000 rubles;
• charger for the Black Decker screwdriver can be found from 650 rubles. This equipment is designed for voltage 12V, but the manufacturer is hard to find on the market;
• in the same price range are the chargers for an intercol screwdriver. Separate models come from 600 rubles, they charge the battery from 3 to 7 hours, it all depends on the characteristics of the battery;
• the same cost is the charger for the SKIL screwdriver at 12V. This manufacturer is popular among consumers due to excellent operational properties and affordable price;
• the feature of the charging for the screwdrivers bison is their versatility. There are fully automatic representatives designed to work with a wide range of batteries. Such models are carried out careful and maximum charging. The price is only 600 rubles.