Screwdrivers have long enjoyed the same popularity not only among professional builders, but also ordinary people, because these units are indispensable when you need to screw something or, conversely, unleash. The versatility of screwdrivers is the main reason for the popularity of these units, both in everyday life and in large-scale construction, but all users of these units have many difficulties when it comes to recharging batteries, which most screwdrivers are equipped with.
Screwdriver structure scheme.
The thing is that with improper charging a so-called “memory effect” appears, that is, under certain conditions the charge capacity may decrease, and in the future the unit will be discharged less fully. As a rule, this effect occurs when a person tries to recharge a screwdriver's battery that is not fully discharged. Proper charging of the screwdriver batteries has a lot of subtleties, so it is very important to consider all aspects of this case so that the screwdriver retains its functionality and performance for a long time.
The main types of batteries screwdrivers
Screwdriver batteries: Lithium Li-Ion, Ni-Cd Ni-Cd, Ni-MH Ni-MH.
Manufacturers of screwdrivers use in the manufacture of their units different batteries, which have their own characteristics of work and, accordingly, charging. In order for the screwdriver to work without failures for a long time, it is very important to carefully read the instructions that come with it. It is worth noting that different screwdrivers differ in many parameters, including price, quality and power, so all screwdrivers are divided into semi-professional and professional. Accordingly, the batteries, which are installed by the manufacturer, also differ in price, quality and, most importantly, charge capacity.
In professional models, which are more expensive, as a rule, batteries are installed with a larger capacity, so they can work without recharging for a much longer period of time. Most professional builders have a spare, pre-charged battery for uninterrupted work, but if the screwdriver is designed to perform simple household work, it is not necessary to have a second battery, although in some cases the additional battery of the screwdriver is included with the unit. There are 3 main types of batteries that are most often used in screwdrivers:
- lithium ion;
- nickel cadmium;
- nickel metal hydride.
Screwdriver battery connection diagram.
The most widely used at present are nickel-cadmium batteries for screwdrivers. This species has a rather compact size, relatively low cost and high charge capacity. The most important disadvantage of these batteries is the “memory effect”, but with proper use and recharging, batteries of this type can be recharged more than 1000 times, although it should be noted that even with proper use, the charge capacity will gradually decrease until it reaches a minimum. In addition, it should be noted that such a battery contains highly toxic substances, so their production is significantly harmful to the environment, which was the reason for their ban in many countries.
Nickel-metal hydride batteries are the second in frequency of use. Batteries of this type belong to the new generation, as they are completely safe for the environment. This type has a lot of advantages, the main of which is the lack of a “memory effect”. However, it is worth noting that they have a high current of self-charging, and these batteries should be stored only in a charged state, and in the case of not using a screwdriver, it is necessary to discharge the device and recharge it for a month.
Lithium-ion batteries are a relatively new product on the market for these products. They do not have a “memory effect”, and therefore do not require adherence to charge cycles to restore charge capacity. It takes a very small amount of time to fully recharge these batteries, and the capacity of these funds is quite high. However, these batteries also have disadvantages, including reduced performance in the cold and a rather high cost.Back to table of contents
Features of charging batteries screwdrivers
Charger scheme for the screwdriver.
A very important point is the first charge of the screwdriver, since it depends on it whether the full capacity of the charge will be activated. Each type of battery has its own characteristics of primary recharging. The greatest difficulty is the charging of nickel-cadmium variants. Their first charge should be three times, so that the entire charge capacity is full. Thus, after the purchase, the unit needs to be fully charged, then turned on and left to work until it is completely discharged, then you need to re-charge and discharge again, and so 3 times.
The Nickel-Metal Hydride version should be completely discharged for the first time, because, as a rule, when buying, this battery has a small charge, after which you need to leave it fully charged. Recharging batteries of this type is possible only after they are completely discharged. The cycle of full charge-discharge should be taken into account the first 4-5 times, after which you can additionally recharge the batteries, even if they are not completely discharged.
Table of characteristics of screwdrivers.
Lithium-ion batteries are more modern, so there are no special requirements for recharging them, since in any case their capacity is not reduced.
During the first and subsequent recharging, it is necessary to take into account that the most optimal recharging effect can be achieved only if this process takes place at a temperature from +10 to + 30 ° C. In addition, it should be noted that when charging, some types of batteries may begin to heat up, which can adversely affect the entire battery. Do not overheat the entire battery above 50 ° C. After work, it is best to keep the battery separate from the screwdriver, although this is not necessary.Back to table of contents
How long does it take to charge the screwdrivers?
The composition of the battery.
Important questions regarding the charging of a screwdriver battery are the time it takes to fully charge the battery. Many people believe that charging the battery of a screwdriver is worthwhile until it gets warm, but in fact this is the right way to reduce the charge capacity and performance of the entire unit. It should immediately be said that at present there are hundreds of types of screwdrivers and not a smaller number of batteries, so it is very important to familiarize yourself with the instructions attached to a specific unit, because in one case 30 minutes will be enough for charging, while in the other for a full charging will take more than 2 hours.
Many types of batteries have a display system, that is, there are 2 LEDs on the upper instrument panel, usually red and green. These LEDs allow you to accurately determine when charging is complete. However, even if there is an indicator, it is necessary to disconnect the batteries from the network in time, as a long stay in the connected state after recharging may cause damage to the battery.
In addition, considering the duration of charging, you need to immediately notice that there are 2 main types of chargers, and it depends on what type is attached with the screwdriver that depends on how long the charging process takes.
Chargers are divided into pulsed and conventional.
As a rule, conventional chargers are equipped with cheaper semi-professional devices. Pulse chargers are more expensive, but at the same time allow you to charge the device in less than 1 hour, which is especially important for professional devices.Back to table of contents
Additional tips for screwdriver charging
If you do not plan to use the tool in the near future, the question immediately arises: do you need to recharge it before moving it to storage? In this case, much depends on the type of battery. Common nickel-cadmium batteries should be precharged. It should be immediately noted that in case the instrument will not be used for a long time, then before you start using it, you will need to perform at least 3 cycles of discharge-recharge the battery to restore its charge capacity.
Nickel-metal hydride units also need to be recharged before sending the tool to storage, and if the period of no use of the tool will exceed 1 month, before using it, it is worthwhile to put the unit into recharging for about a day. This will restore the charge capacity. Lithium-ion batteries are considered the most convenient in this regard, since they do not need to be charged before storage.