Conditioning chargers. How to choose a car battery charger. Introduction: modern chargers

Types of chargers. Safety instructions for charging the battery.

The most common types of chargers are:

Accelerated memory devices 1-3 hours;

Not every type of battery can be charged in an accelerated charger; for example, a lead acid battery cannot charge as quickly as a nickel cadmium battery.

Determining the end of the charge is extremely important in accelerated chargers, since a longer battery charge at high currents and, accordingly, a rise in temperature are dangerous for the battery.

Slow chargers 14–16 hours (sometimes 24 hours);

If the Ni-Cd battery is charged with a current of 1 C (100% current of the nominal capacity for an hour), then the typical charge efficiency in terms of capacity will be 0.91 (for an ideal battery it will be - 1). For a 100% charge, you need to charge 66 minutes. On a slow charge of 0.1 C (10% current of the nominal capacity for 10 hours), the charge efficiency in terms of capacity will be 0.71.
The reason for the low charging efficiency is that some of the charge energy absorbed by the battery is dissipated into heat. Therefore, in a slow charger (the current is 0.1 C, that is, 10% of the nominal capacity - see the capacity estimate), the battery is recommended to be charged for 14-16 hours (this should not be taken as a 140% charge!), And not within 10 hours.

Usually slow chargers (for Ni-Cd, Ni-MH batteries, the charging current is equal to 10% of the nominal battery capacity) do not determine the end of the charge, since at a low charging current, a longer stay of the battery in the charger, say, for 1–2 hours, does not leads to critical consequences.

Conditioning chargers;

The preference for air-conditioning chargers is that by constantly charging Ni-MH and Ni-Cd batteries in these chargers, you can significantly increase the battery life (not forgetting the rules for using batteries!)

Car batteries are a complex and dangerous technique. In their manufacture, poisonous and hazardous chemicals are used that can harm the human body if the elementary rules for safe work with batteries are not followed. It is necessary to handle them, observing safety precautions, since the composition of the batteries contains dangerous explosive and harmful poisonous substances:

Sulfuric acid is extremely dangerous, toxic, easily reacts with all elements, causes burns, fire, vapor poisoning. When interacting with water, in the case of electrolyte preparation, a lot of heat and gas are released. Charged car batteries have a 30-40% concentration of sulfuric acid in the electrolyte, while discharged ones have only 10% or less. It contains small proportions of arsenic, manganese, heavy metals, nitrogen oxide, iron, copper, chloride compounds.

Lead - Lead and lead salts (lead sulfate) are highly toxic substances. The toxicity of lead does not have such a bright instant effect as sulfuric acid, but it tends to accumulate in the body, affecting vital organs, for example, the kidneys. Persistent lead poisoning causes headache, fatigue, and pain in the heart.

Arsenic is very toxic. Poisoning occurs when only 5 mg enters the human body, and it also accumulates, causing serious consequences. Arsenic compounds are also poisonous. Causes headache, vomiting, abdominal pain, nervous disorders.

Hydrogen is an explosive and flammable gas. At a ratio of approximately 2 to 5, hydrogen and oxygen form an oxyhydrogen gas that can cause a violent explosion. Every year tens of thousands of people suffer from burns and wounds when exploding oxyhydrogen gas while working with batteries.

Battery safety rules:

1) Car batteries can only be charged in a well-ventilated area or with constant access to air.

2) It is possible to work with electrolyte only with rubber gloves and goggles; the surface of the skin should be as much as possible covered with clothing.

3) DO NOT pour distilled water into sulfuric acid, only acid into water, because water is lighter than acid, getting on its surface, it boils and splashes poisonous liquid around. Acid, getting into the water, immediately drowns and cannot be sprayed.

4) DO NOT smoke, ignite anything, use faulty electrical appliances that can spark when charging the battery.

5) Before charging the battery, it is necessary to release the accumulated gases, clean the gas outlet. Even when the battery is fully charged, when you install it, you need to wait until all gases have evaporated.

6) Ventilate the engine compartment before installing the car battery in its seat. Connect after a while, do not try to cause a "spark" in order to avoid an explosion.

7) DO NOT charge car batteries in a closed area where people are, for example, in an apartment. Evaporation of vapors of toxic compounds can cause mild poisoning, which causes the typical symptoms of chemical poisoning: headache, nausea, pain in the eyes, fatigue, nervous breakdown and irritability.

1. General safety requirements.
1.1. Persons who have passed a medical examination, introductory instruction on labor protection, instruction at the workplace, who have mastered the practical skills of safely performing work and have passed the test of the knowledge and skills obtained during the instruction are allowed to work on charging and maintaining batteries.
1.2. Batteries in the process of work must comply with the internal labor regulations of the company.
Smoking is allowed in places specially designated for this purpose, provided with fire extinguishing means.
1.3. It is necessary to keep the workplace in order and cleanliness, store raw materials, workpieces, products and production waste in the designated areas, do not clutter the aisles and driveways.
1.4. The worker can be exposed to hazardous and harmful production factors (moving machines and mechanisms, moving loads, industrial microclimate, increased explosive concentration of hydrogen, caustic acids and alkalis).
1.5. The battery operator must be provided with overalls and personal protective equipment:
a cotton suit with acid-proof impregnation;
rubber ankle boots;
rubber gloves;
rubber apron;
protective glasses.
1.6. Those working on charging batteries must strictly observe safety requirements when working with acids and caustic alkalis, which, if improperly handled, can cause chemical burns, and with an increased concentration of vapors in the air - poisoning.
1.7. When rechargeable batteries are charged, hydrogen is released, which introduces fine electrolyte splashes into the air. When hydrogen accumulates, it can reach an explosive concentration; therefore, batteries cannot be charged without ventilation.
1.8. Electrical safety rules must be observed when connecting batteries.
1.9. Persons involved in charging batteries must know well and strictly follow all the requirements set forth in this manual, and the administration of the enterprise is obliged to create normal working conditions and provide the battery operator's workplace with everything necessary for the safe performance of the work entrusted to him, as well as first aid means to prevent chemical burns with electrolyte (running tap water to wash off acid or alkali splashes; 1% boric acid solution to neutralize alkali).
1.10. Batteries must be familiar with and follow the rules of personal hygiene.
1.11. Batteries must be able to provide first aid to the injured person in the event of an accident.
1.12. Safety instructions must be issued to all battery operators against receipt.
1.13. Trained and instructed battery operators bear full responsibility for violation of the requirements of the labor protection instructions in accordance with the current legislation.
2. Safety requirements before starting work
2.1. Put on working overalls, rubber boots and prepare personal protective equipment (rubberized sleeves, rubber gloves and goggles), fasten the cuffs of the sleeves, wear acid-resistant suit trousers over the boot tops, put on a rubber apron (its lower edge should be lower than the upper edge of the boot tops), tuck in clothes so that there are no fluttering ends, pick up hair under a tight-fitting headdress.
2.2. Carefully inspect the workplace, put it in order, remove all objects that interfere with work. Arrange the working tool, fixtures and auxiliary materials in a convenient order for use and check their serviceability.
2.3. Check and make sure that the supply and exhaust ventilation and local extractors are working properly;
check the sufficiency of lighting in the workplace;
make sure that there are no unauthorized persons in the room.
3. Safety requirements during work.
3.1. Avoid ignition of fire, smoking, sparking of electrical equipment and other equipment in the battery charging room.
3.2. Connect the terminals of the batteries for charging and disconnect them after charging only when the equipment of the charging place is turned off.
3.3. When inspecting batteries, use a portable, safe voltage 12 V lamp.
Before connecting the portable light bulb to the network, in order to avoid arcing, first insert it into the socket, and then turn on the breaker; when turning off the electric lamp, first turn off the breaker, and then remove the plug.
3.4. Do not touch the two terminals of the batteries with metal objects at the same time to avoid short circuit and sparking.
3.5. Check the battery voltage only with a voltmeter.
3.6. When removing and installing batteries on an electric car, make sure that they do not short circuit with the metal parts of the electric car.
3.7. Connect the batteries to the DC power grid and connect the batteries to each other with rubber gloves and rubber shoes.
3.8. Do not touch live parts (terminals, contacts, electrical wires) with your hands without rubber gloves. If it is necessary to use a tool, use a tool with insulated handles.
3.9. When working with acid, acidic and alkaline electrolyte and electrolyte preparation, observe the following requirements:
the acid should be stored in bottles with closed ground stoppers in special crates, in separate ventilated rooms. Acid bottles should be placed in one row on the floor. Empty acid bottles should be stored under similar conditions;
on all vessels with electrolyte, distilled water, soda solution or boric acid solution, bottles with acid, clear inscriptions (names) of the liquid must be applied;
the transfer of bottles should be carried out by two persons using special stretchers, on which the bottle is securely fixed. Pre-check the serviceability of the stretcher;
the filling of acid from the bottles should be done with a forced tilt using special devices for securing the bottles. Acid can be bottled using special siphons;
prepare electrolyte only in a specially designated room;
when preparing the electrolyte, it is necessary to pour a thin stream of sulfuric acid into distilled water, stirring the electrolyte all the time;
it is forbidden to pour distilled water into sulfuric acid, since water in contact with acid quickly heats up, boils and, splashing, can cause burns;
prepare electrolyte only in lead, earthenware or ebonite baths. Preparation of electrolyte in glassware is prohibited, as it may burst from sudden heating;
it is forbidden to work with acid without protective glasses, rubber gloves, boots and a rubber apron, which protects against possible acid drops on the body or eyes of the worker;
crushing of pieces of caustic alkali should be carried out using special scoops, tongs, tweezers and burlap. The worker must be protected by a rubber apron, rubber gloves and goggles;
do not stir the electrolyte in the bath by blowing air through the rubber hose.
3.10. When charging batteries, do not lean close to the batteries to avoid scalding from acid splashes escaping from the battery opening.
3.11. Carry the rechargeable batteries in special trolleys with slots for the size of the batteries. Do not carry batteries manually, regardless of their number, except for rearrangements.
3.12. Do not touch heated resistance coils.
3.13. Strictly observe personal precautions: eat only in the room designated for this purpose. Before eating, wash your hands and face with soap and water and rinse your mouth with water. Do not store food and drinking water in the battery room;
daily to clean tables and workbenches, wiping them with a cloth soaked in soda solution, and once a week to clean walls, cabinets and windows.
4. Safety requirements in emergency situations.
4.1. In case of contact of sulfuric acid on the skin or eyes, immediately wash it off with a copious stream of water, then rinse with a 1% solution of baking soda and report to the master.
In case of signs of poisoning from an increased concentration of sulfuric acid in the air, go out into the fresh air, drink milk and baking soda and report to the master.
4.2. In case of contact with alkali (caustic potash or caustic soda) on the skin or eyes, immediately wash it off with a copious stream of water and rinse with a 3% solution of boric acid.
In case of signs of poisoning from an increased concentration of alkali in the air, go out into the fresh air, drink milk and report to the master.
4.3. In case of electric shock, you must:
release the victim from the action of electric current;
to free him from the clothing that embarrasses him;
provide access to clean air to the victim, for which open the window and doors or take the victim out of the room and do artificial respiration;
call a doctor.
4.4. In the event of a fire, call the fire brigade, notify the administration of the enterprise and start extinguishing it with the available means.
5. Safety requirements at the end of work.
5.1. Tidy up the workplace.
Wipe the tools and accessories and put them in the designated place.
5.2. Close the taps of the acid and electrolyte containers securely.
5.3. Inform the foreman or supervisor about all faults and shortcomings noticed during work, and about the measures taken to eliminate them.
5.4. Remove and deposit in the prescribed manner overalls, personal protective equipment.
5.5. Wash your hands and face with warm water and soap, rinse your mouth well or take a shower.

Many modern devices do not operate on an electrical network, but on a battery that stores energy. Cars, mobile phones, players, etc. are arranged according to this principle. Different types of chargers are used to service technicians. They can be used for industrial purposes, as well as for servicing home portable devices.

Main types

There are different classifications of battery chargers. They are all based on different parameters and properties of the devices. Depending on how they work, there are 2 types:

In addition, chargers are usually subdivided according to their operating speed. ... Taking this criterion into account, the following types are distinguished:

Pulse devices

These devices are designed to charge small household appliances. They are equipped with an electronic timer that can operate for 4 hours in quick charge mode. During this period, almost any discharged battery gains its capacity.

After this time, the device switches to the pulse charging mode. Energy is supplied to the terminal elements of the device to maintain the charge level.

The advantages of such models are as follows:

1. Low cost.
2. Technical simplicity.
3. Ease of use.

Typically, manufacturers set the timer based on the fact that the battery is completely discharged. If it was partially discharged, then there is a risk of damage to the battery by excessive current. This feature does not apply to branded batteries for mobile phones, tablets and other digital equipment, unless they are charged using universal devices.

The most advanced in their line are the types of chargers with microprocessors. They do not allow recharging the battery, so they can be used to work with any devices, even if they are not fully discharged, but partially. The disadvantages of such models include a very high price.

It is highly undesirable to replace a branded device from a phone or PDA with a universal one, since they may have differences in the structure of electrical connectors. When connecting to the charging of any household appliance, the charger itself is first connected to the network, and then a phone or other device is connected to it.

Car attachments

All devices for charging car batteries are usually divided into several groups. Based on the existing classification, there are:

When choosing a charger for cars, you should take into account some of the features of its operation. If possible, then it is better to give preference to the charging and starting option. With such a device and an electrical outlet at hand, you can always start the car without waiting for the battery to be fully charged.

When buying a charger, it is better to choose a model that exceeds the battery requirements by about 10%. For those who are not strong in electrical engineering, the automatic model is more suitable - although it costs a little more, it will help to avoid unnecessary difficulties.

It is better to buy a device in trusted stores, preferring reliable manufacturers. Before using the device, be sure to read the instructions.

A charger is a special device that is designed to charge the battery with electricity from external sources. In most cases, they use power from the AC mains. Such devices can be used to recharge tablets, phones, laptops, toothbrushes, cars and other units where battery recharging is required.

Battery chargers are often included with purchased equipment, for example, a charger for a cell phone. But in some cases, such a device must be purchased independently. There are a large number of devices on sale today that allow you to recharge the battery. But for the right choice, you need to know how to correctly evaluate the selected product, which, first of all, you should pay attention to.

Views

The charger, according to the method of its application, can be:

• External.
• Built-in.

Devices can be classified according to the method of battery charging, type of indication, performance, presence of a discharge function, and others. For example, in devices for cell phones, the indicator is the mobile screen, where the battery charge level is displayed.

Charges can also be:

• Rechargeable- the work is carried out according to the charge accumulation scheme and its further return to the battery device.

• Networked- power is supplied from the electrical network, after which the voltage is converted to the voltage required for a particular unit.

• Automotive- they operate from the cigarette lighter located in the car. The power source here is the on-board network.

• Universal Is a wire that has a connector for connecting a smartphone, as well as a USB connector for charging from a personal computer.

• Wireless- the phone does not interact directly with the current. The device represents a special platform. This accessory is based on the principle of an induction coil.

For different types of batteries, different charging devices are produced, for example, for NiCd, NiMH, Li-Ion or even combined batteries.

According to the method of charging, the devices can be charging with constant or impulse current. Depending on the required functions, the devices can be professional or household. Charging times can be slow or fast.

Device

The charger in most cases includes the following items:

• Voltage transformer. It can be a switching power supply or a transformer.
• Voltage regulator. It maintains a constant voltage, regardless of its fluctuations occurring in the input circuit.
• Rectifier. This element converts electric current of alternating value into direct current, that is, the one that is required to charge the battery of a particular device. Each type of battery requires a certain amount of input voltage.
• A device that controls the charging process or the strength of the electric current.
• Led indicator.

The charger may have other elements, for example, a battery in external units and other devices. Industrial devices additionally have blocks with electronic equipment that control the charging process. Such devices are used to simultaneously charge 3-5 rechargeable batteries. Certain models can simultaneously charge with pulsed currents and perform continuous charging.

Complex devices are equipped with microcontrollers that allow you to accurately track a number of parameters: temperature, battery voltage, charge and other indicators. In more advanced devices, there is even an outside temperature sensor, because it significantly affects the charging process.

Operating principle

All devices that are used to recharge batteries almost always operate according to the same principle. When connected to an electrical network, a voltage of 220 V is supplied to the charger. The elements of the device adjust the strength and voltage of the current to those indicators that are necessary for charging a specific battery. In addition, each type of battery requires its own method and order of recharging.

For automotive lead-acid batteries, it is recommended to recharge until they are completely discharged. Alkaline batteries should be fully discharged as they have a memory effect. But at the same time, both types of batteries should be recharged to their maximum value. Therefore, in recent years, only automatic devices for machines have been produced, which do not require human intervention. They only need to be connected to the mains and clamped to the battery terminals.

An automatic charger controls everything:

Monitors the charge level, cycle, as well as the procedure itself. After charging one hundred percent, the unit turns itself off. If the device is not disconnected, it will constantly monitor the status of the battery. When the charge drops, the sensors see this, as a result of which the battery begins to recharge. As a result, the charge level will be at 100 percent.

There are wireless charging systems that use the principle of electromagnetic induction. This means that charging occurs at a certain distance due to the appearance of an electric current in the closing circuit when the magnetic voltage that permeates this circuit changes. The system includes the first and second coil. The result is an inductively coupled system.
The alternating current that flows in the winding of the primary coil forms a magnetic field, forming an induction voltage in the second coil. It is this voltage that is used to charge the battery. But this principle is valid only at a certain short distance. When the phone or other device is removed, most of the magnetic field is dissipated, as a result, the secondary coil does not receive it.

There is also a manual charger, which is often used to charge a cell phone somewhere in the wilderness, where there is no electrical network, for example, in the taiga. However, the principle of their operation is completely different, they operate on the principle of wind turbines. The main element of such devices is the handle for rotation. The function of this handle is comparable to that of a wind turbine propeller.

When the handle is twisted, the rotation is transferred to the rod. As a result, the kinetic energy, which is created by man, is directed to the generator of the charging device. It is the last element that produces an electric current with a low voltage of about 6 volts. This voltage is quite enough to charge a dead battery, make the necessary call or send a message.

Application

The charger is used to charge the batteries of devices and equipment:

• Cell phones and smartphones.
• Tablets.
• Laptops.
• Toothbrushes.
• Portable, and many other battery-powered electric tools.
• Electric cars.
• Portable vacuum cleaners, hair dryers.
• Cars, motorcycles and other equipment.

How to choose

A huge number of types of battery charging are sold. These are domestic and foreign. Therefore, it is sometimes difficult to make a choice.

• If you need a device to charge your car from time to time, then take a look at a simple but reliable device without unnecessary functions. For example, such charging can be useful for charging the battery due to its idle time during cold weather or travel to foreign countries on vacation.
• For beginners, it is best to choose automatic devices where no configuration is required. For experienced car owners, multifunctional or starter-chargers are recommended. The number of options is limited only by financial means.
• You only need to purchase a charger that is designed for your specific electrochemical system. You should be aware that most of the devices are used only for a specific type of equipment. For example, the phone connector may not fit or the device generates a current of a certain voltage. Whereas for a certain device, a completely different voltage is required. Do not charge the battery in case of voltage mismatch.
• Using a charger with a higher power rating will shorten the charging time, but the battery itself may be limited. Rapid charging in the absence of such a function in the unit can reduce the life of the battery or even damage it.
• You should also pay attention to the shape, design, construction and dimensions of the charging device. The choice here in this case depends on the buyer.
• When choosing a wireless device, you need to pay attention to the manufacturer of the equipment. Not every brand makes devices with batteries that are suitable for wireless charging. There are also "PMA" and "Qi" food standards. There may be limitations here as well. Not all technology can support these two standards.
• When choosing a wireless device, you should also pay attention to power, functionality, operating time and safety.

There are a great many chargers in the world, but it is not always possible to find what you need in our country.

For rare models, there are none at all, even the most simple ones, and for common models there are only chargers, similar to those included in the delivery of mobile phones, and automobile ones. This is due primarily to the low demand for accessories of this kind. In most cases, consumers think they can get by with the charger that comes with the phone, and I must say they are almost 100% right. Of course, "if the stars are lit, then somebody needs it." And if chargers are available (I must say - for every taste and wealth), it means that someone also needs it. Our task is to tell you about what storage devices are and what functions they perform, as well as what you should pay attention to when buying a storage device. Chargers differ from each other in the way the battery is charged, in the presence of the discharge function and in all kinds of indications. In the charger, which are included in the delivery set of a mobile phone, as a rule, the charge indicator is the phone itself, more precisely, its screen, which displays the battery charge level. Such chargers do not have a discharge function (unlike, say, desktop chargers). What other types of storage devices exist in nature?
1.Different chargers are available for different types of batteries. So, there are chargers for nickel-based batteries (nickel-cadmium (NiCd) and nickel-metal hydride (NiMH)), for lithium-ion (Li-Ion) batteries and combined.
2.Depending on the design, chargers can be built into the phone or into an external power supply (designed to charge batteries directly in the phone); they can be desktop (provide both charge and discharge) or manual (Motorola has released a charger called Motorola FreeCharge, which works on manual recharging).
3. RAMs, as mentioned above, can differ in the way of charging: there are devices that charge direct current, and devices with a pulsed charging method.
4. According to the charge time, there are “fast” and “slow” chargers.
5.According to the type of input supply voltage, there are different chargers connected to the AC voltage network and chargers connected to the vehicle's on-board network (they provide power to the phone from a 12 or 24 V network from a car cigarette lighter and charge a spare battery).
6.Depending on the functions performed, household and professional chargers also differ.

The most widespread are the chargers supplied with the mobile phone. These devices provide users with a minimum of worry and are designed to work with NiCd, NiMH and Li-Ion batteries. Such chargers will equally efficiently charge all these types of batteries, but, as we mentioned above, they have one drawback: the fact is that nickel-based batteries must be periodically discharged in order to reduce the "memory effect" (arises from the fact that that the voltage at which the phone turns off exceeds the voltage to which it is necessary to discharge the battery in order to prevent a decrease in capacity that occurs during operation). For such batteries, it is recommended to use a desktop charger with a discharge function. (Attention: after the end of the charge, nickel batteries should not be left in the charger for a long time, since the charger continues to charge them, but only with a much lower current. Long-term presence of such batteries in the charger leads to overcharging and deterioration of their parameters.)

Car chargers are designed for those who spend most of their lives behind the wheel. The simplest of them is made in the form of a cord that connects a cell phone to a car cigarette lighter socket. It is very simple and very convenient, but you should not overuse this charging method, especially when driving around the city, since frequent stops and, accordingly, repeated starting of the engine can significantly shorten the battery life.

When using the charger, it is important to correctly determine the end time of the charge. "Slow" chargers (used for NiCd and NiMH batteries; charging current is 10% of the nominal capacity of the battery (nominal electric capacity is the amount of energy that the battery should theoretically (ideally) have in a charged state), charging time - 10 - 12 hours) are usually not particularly sensitive to small violations of the charging time: if the battery with a low charging current stays in the charger, say, 1 - 2 hours longer than the prescribed time, this will not lead to critical consequences.

"Accelerated" memory devices are a different matter. The fact is that it is dangerous for a storage battery to receive an excessive charge at a high current and, accordingly, overheat. "Accelerated" chargers charge the battery with a current equal to 33 - 100% of its nominal capacity. The charging time is 1 - 3 hours.

You can find out about the completion of the charging process in some cheap chargers by focusing on reaching a specific voltage value on the battery. Difficulties in assessing the correct state of charge of the battery are due to the fact that the voltage can vary depending on the ambient temperature and the rate of charge.

There are chargers in which the charging time is counted using a special timer: after a certain time, the current is no longer supplied to the battery. The problem is that if, after charging, you put the battery back into such a charger (for example, by mistake), it again "in good faith", at the exact time counted by the timer, will give the battery another portion of the charging current, as a result of which the "life" of the battery will be reduced ...

Complex chargers are equipped with a microcontroller, which allows you to more accurately track the end of the battery charge and several more parameters: battery voltage, current, temperature and other variable values. In even more complex chargers, there is an external temperature sensor (it has a very strong effect on the charging process).

Pulse charging, which is used in conditioning chargers and battery analyzers, is most suitable for NiCd and NiMH batteries. The essence of this method is that the battery is charged and discharged in short pulses for certain periods of time. Discharge current pulses are designed to minimize the formation of unwanted crystals on the plate of NiCd and NiMH batteries, which in turn minimizes the "memory effect" and increases battery life. However, batteries with a large "memory effect" alone will not save a pulse charge - in order to destroy more resistant crystalline formations, they need a deep discharge (recovery) according to a special algorithm. Conventional chargers, even with a discharge function, are not capable of this.

Studies carried out in the laboratory of the Kvazar-Micro-Radio service center have shown that periodic (at least once a quarter) recovery of batteries in an analyzer using a pulsed charge increases the life of NiCd batteries by an average of 20%, and 8% - NiMH, which have been in operation for less than a year.

So, if you want your battery to last long, buy desktop chargers. But keep in mind that not all devices of this type are capable of effectively charging Li-Ion batteries. For example, Motorola clearly states in its instructions that only charger with the “EP” (Expert Performance) logo should be used to charge Li-Ion batteries. In addition, each charger is designed to charge batteries of a certain capacity. For example, a "slow" charger designed to charge small batteries may not fully charge a large battery, even if the charging time is increased. And vice versa: a "fast" charger (with a high charge current) can overcharge a battery with a small capacity.

And one more thing: when buying a charger, be sure to pay attention to the rules of its operation (purpose, functions, features and restrictions of use), and then your mobile phone will not demand to recharge the battery at the most inopportune moment.

Well, as a postscript - information for thought (is the game worth the candle?):

1. Any telephone "morally" becomes obsolete in 1 - 3 years.
2. Even with the worst treatment, the battery can work for a year and a half.
3. The cost of a new battery in most cases is comparable or even lower than the cost of a fancy charging.
4. The new cell phone may not work with the charger purchased earlier.