OTG standard

To many models of smartphones and tablets, you can connect the same models of flash drives as to a PC. you only need device support for the OTG standard and a special adapter.

samsung, charging, connector

With it, you can connect not only a compact flash drive to your phone, but also a computer mouse, keyboard or gamepad. An adapter is also suitable for connecting a printer. documents and pictures can be printed directly from a mobile gadget.


Previously, the Apple 30pin proprietary standard was used in the mobile gadgets of the Cupertino company, but since 2012 it has been replaced by the eight-pin Apple Lightning connector, which is similar in charging and data transfer speeds to MicroUSB. Calls from officials and the media did not lead to the abandonment of its own connector, instead, the company released a number of adapters with which you can charge the iPhone using ordinary USB chargers.

USB Type-C and USB 3.1. what’s the difference

It is necessary to distinguish the form factor of the connector from the communication standard. For example, the USB Type-C format can meet different specifications. USB 2.0, 3.0 or 3.1. In the first case, it is capable of transmitting data at speeds up to 480 Mbit / s, and in the latter, up to 10 Gbit / s. MicroUSB connectors on smartphones comply with the USB 2.0 standard.

The actual data transfer rate is usually several times less than the maximum and may be limited not only by the supported standard, but also by the cable, the port of a smartphone, tablet or computer, the performance of the controller and memory, so the theoretical limit is unattainable in real use scenarios.

Based on the foregoing, the presence of a USB Type-C connector on the device is not a guarantee of high speed charging and data transfer. The current version of the interface should be clarified in the technical specifications of specific devices, and then checked against user experience. this will help thematic forums and other specialized resources.

USB Type-C

A standard designed to replace the aging microUSB. USB Type-C. The maximum theoretical data transfer rate through this connector is up to 10 Gb / s, which is provided by a 24-pin contact group. However, it all depends on the implementation in a particular device model. if the manufacturer has not provided support for USB 3.0 or 3.1, limiting itself to USB 2.0, then there will be no increase in speed compared to MicroUSB. By the way, the dimensions of the connector. 8.34 x 2.56 mm. Slightly more than MicroUSB, but this is an insignificant cost for a multiple of the performance gain: USB Type-C remains very compact and can be used in almost any device.

An additional benefit of the updated interface is the symmetry of the oval connector. Now users do not have to flip the plug several times, cursing at engineers who are not familiar with the concept of “usability”. The charging speed has also grown significantly, and the maximum theoretical power that the interface supports (with USB 3.1) reaches 100 W, but this option requires an advanced implementation. standard profiles are limited to 7.5-15 watts. The declared mechanical resource does not differ from MicroUSB and is about 10,000 connections.

Types of connectors for charging phones

Once upon a time, the connectors for charging mobile phones had only one purpose. in fact, to charge the device. At the same time, almost every major manufacturer had its own standard, and the charger or cable from one phone did not fit the other. But already at the beginning of the 2000s, companies drew attention to consumer dissatisfaction and began to more often use not proprietary, but unified solutions in their devices.


The most famous and popular of these solutions is the MicroUSB connector, which allows not only charging the device, but also transferring data. With its distribution, the need to have its own charger for each gadget has disappeared, and the MicroUSB / USB Type-A cable has become a universal way to connect a smartphone to both a charger and a computer or laptop.

Important: a PC charges the phone much more slowly than a charger connected directly to an outlet. If you want to charge the device as quickly as possible, put it into airplane mode and use the charger.

The dimensions of the connector are only 7×2 mm. It was the compactness that became one of the main factors that played in its favor when manufacturers chose between MicroUSB and MiniUSB options. The standard provides power up to 2.5 W and allows you to fully charge the phone in 1-5 hours, depending on the battery capacity, as well as the characteristics of the charger and the device itself. The maximum data transfer rate through such a connector in theory can be up to 480 Mbit / s, but in practice it is limited by many factors and can be several times lower.

In 2009, 13 firms that make smartphones and other digital technology, including big ones like Samsung and Apple, signed a document confirming their intention to standardize connectors and interfaces. The reasons are not only marketing, but also political, as well as reputational. the European authorities have repeatedly urged manufacturers not to increase the number of different chargers, which then need to be recycled or disposed of.

About a year later, the European Parliament issued a statement formally calling on mobile device manufacturers to adopt a single standard. This policy of representatives of various states played a role in securing microUSB as a universal connector for charging gadgets and transferring files. Only a few companies have abandoned it. The most famous among them is Apple.

Charging gadgets via USB

Wiring diagrams for chargers from different manufacturers.

USB charging problems usually appear when using a third party (non-native) charger. The gadget may charge slowly, not completely, or it may refuse to charge altogether. Actually, this article is devoted to this problem. But first, I have to make a few important points regarding USB charging in general.

  • Oddly enough, some mobile devices do not support charging via the USB mini / micro slot at all, although they are equipped with it. For example, some tablets are equipped with a separate (round) socket for connecting a charger (charger).
  • When charging a device from a USB computer, it should be understood that the USB port is capable of delivering a current of no more than 0.5 amperes (USB 2.0) or no more than 0.9 amperes (USB 3.0). And if a higher current is required to charge the device (1 ÷ 2 amperes), then the charging time can be painfully long, up to infinity. We’ll have to look for a memory of suitable power.
  • To understand what kind of contacts are responsible for what in USB connectors and how they are numbered, read the article “USB 2.0 pinout”. In short: the first pin in USB is 5 volts, and the last is ground.

So, you connected the gadget to the left / homemade charger, but it does not charge, and even says that the charger is not supported. This is due to the fact that before allowing yourself to be charged, some mobile devices measure the voltages on the 2 and 3 USB pins and, based on these voltages, determine the type of charging port. And some. just check for the presence of a jumper between pins 2 and 3 or else and control the potential of this bundle. If the gadget is not designed to connect to this type of charging port or the port type is not defined, then the charger will be rejected. This whole kitchen is described in detail in the article “Types of charging ports”.

The practical side of the issue is for the gadget to see the voltages it needs on pins 2 and 3, and this is ensured by connecting various resistances between the USB contacts of the charger. At the end of the article, there is a drawing of various types of charging port (without reference to gadget models) with an indication of the voltages on pins 2 and 3. It also indicates what resistances this can be achieved. And right now we will see what certain models of gadgets expect from the charger port.

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Nokia, Fly, Philips, LG, Explay, Dell Venue and many other devices recognize the charger only if the Data and Data pins (2nd and 3rd) are short-circuited or shorted by a resistor of no more than 200 Ohm. Pins 2 and 3 can be short-circuited in the USB_AF socket of the charger and safely charge your phone via a standard data cable. The same scheme is supported by the Freelander PD10 Typhoon tablet, but besides this, it requires an increased charge voltage, namely, 5.3 volts. If the charger already has an output cord (instead of an output jack), and you need to solder a mini / micro USB plug to it, then do not forget to connect 2 and 3 contacts in the mini / micro USB itself. In this case, you solder plus to 1 contact, and minus to the 5th (last).

Samsung, HTC and other Koreans: one 30 kOhm resistor between 5 and jumper D-D; another 10k ohm resistor between GND and jumper D-D

iPhone and other Apple products. Freelander PX1 tablet readily charges from the same port.

The Ginzzu GR-4415U car charger, which claims to be versatile, and its analogs are equipped with two output sockets: “HTC / Samsung” and “Apple” or “iPhone”. The pinout of these sockets is shown below.

Old Motorola “requires” a 200 kΩ resistor between pins 4 and 5 of the USB micro-BM plug. Without a resistor, the device does not charge until complete victory.

The device E-ten (“Raccoon”) is not interested in the state of these contacts, and will support even a simple charger. But he has an interesting requirement for the charging cable. the “Raccoon” is charged only if pins 4 and 5 are shorted in the mini-USB plug.

Your Garmin Navigator requires a dedicated data cable to power or charge. Just to power the navigator through the data cable, you need to short-circuit 4 and 5 contacts in the mini-USB plug. For recharging, you need to connect 4 and 5 pins through an 18 kΩ resistor.

A separate topic is charging tablets. As a rule, a tablet requires a decent current to charge (1 ÷ 1.5 amperes), and charging through the mini / micro-USB socket is simply not provided by the manufacturer in many tablets. After all, even USB 3.0 will not give more than 0.9 amperes. True, some tablet models can be slowly and sadly charged when turned off. On YouTube, one guy suggests installing a jumper in the 3Q tablet between the first pin of the mini / micro-USB socket (this is 5V) and the plus (center) pin of the round (coaxial) charging socket. Say, there is enough current from USB for this tablet, it’s just that the USB jack is not connected to the battery charge controller. After installing the jumper, the tablet is supposedly charging. In principle, this is a way out if the round charger socket itself is already broken. On the contrary, if the round socket is in order, but for some reason you want to take power for charging from a USB computer or a charger with such a connector, then you can make such an adapter.

True, he has nothing to do with the topic of this article.

Charging port types

Again, detailed information can be found in the article Types of charging ports. Here I will also give a summary diagram of the voltages on the USB contacts with an indication of the value of the resistors that allow one or another voltage to be obtained. Where a resistance of 200 ohms is indicated, a jumper must be installed, the resistance of which should not exceed the same 200 ohms.

So, if you want to convert a regular charger into a USB charger for your phone:

  • make sure the device outputs about 5 volts DC
  • find out if this charger is capable of giving a current of at least 500 mA
  • make the necessary changes to the connections of the USB-AF jack or USB-mini / micro plug

All “Computer” All “Mobile” All “Charger”

Using Fast Charging on Samsung Phones

No matter what smartphone you use, you will constantly monitor the battery level and regularly connect your mobile device to a power source. Different models of mobile devices take different time to replenish the battery. Fast charging technology helps to reduce it. Today, more and more Android and iOS devices are receiving this feature. From the name of this technology, it follows that, subject to certain rules, the phone can be charged up to 80% in just half an hour.

Some Galaxy S10 phones (S10, S10 Plus and S10e) use a 15W charger (Qualcomm QuickCharge 2.0 technology), Samsung Fast Charge for the Galaxy S10 5G is rated at 25W, and the S20 and Note 10 adapter supports 45W The standard charger, with which most phones are charged, has 10 watts.

Quick Charge Basics

So, we know how batteries are charged and discharged. But fast charging is different from regular charging, and in order to understand how it works, you have to learn a little about what a battery charge controller is. You will also have to remember from the school physics course that voltage is measured in volts, current is in amperes, and watts are a unit of measure for power, that is, the amount of energy that is consumed per unit of time.

Higher amperage and higher voltage charge the batteries faster. But when it comes to the battery, these parameters are limited.

Smartphone batteries are recharged when an electric current flows through them. But it must be remembered that the battery cannot take on infinitely much current; at peak loads, it breaks down and collapses. This is where you need a device such as a charge controller. This controller protects the battery from dangerous current peaks. It regulates the flow of electricity that goes into and out of the battery. Simply put, controllers regulate the current (in amperes) at which the charging process takes place, measuring both the strength and the voltage. They do not allow critical exceeding of permissible parameters that can damage the battery.

Acceptable / standard values ​​for USB charging are shown in the table below.

Voltage Current strength Max. power
USB 1.0 5 in 0.5 A 2.5 watts
USB 2.0 5 in 0.5 A 2.5 watts
USB 3.0 5 in 0.5 / 0.9 A 4.5 watts
USB 3.1 (USB-C USB-PD) 5–20 V 0.5 A / 0.9 A / 1.5 A / 3 A / 5 A 100 watts

Fast charging standard

USB Power Delivery (USB-PD) technology has become the standard for fast charging. It was developed several years ago to transfer power in larger quantities. The maximum power of USB-PD, as we can see in the table, is up to 100 watts. Consequently, from the USB-PD connector, you can charge not only smartphones, but also some laptops that are equipped with USB-C.

The advantage of the USB-PD standard is that portable chargers that have a USB-C port can serve as a power source for other gadgets, or, conversely, these chargers can take charge for themselves, being powered by energy from third-party devices. USB-PD chargers are capable of transferring energy at high speed, for example, to a smartphone battery. And then, also at the highest speed, charge the laptop.

Different manufacturers use the USB-PD standard in different ways, each has its own pros and cons.

Samsung Adaptive Fast Charging

  • the technology is used in the vast majority of Samsung devices;
  • technology compatible with Quick Charge 2.0.

Disadvantage. there is some conservatism of the manufacturer regarding the further improvement of this standard.

Initially, Samsung only used Adaptive Fast Charging on its Galaxy series devices. Unlike Quick Charge and other rapidly evolving standards, adaptive charging is fully compatible with the Exynos on-chip system commonly found in devices intended for sale in the global market. Adaptability implies the ability to vary the process for different conditions. As for charging, in this case, its power changes / adjusts. When the battery is heavily discharged, it charges with increased power. As soon as the battery reaches a sufficient level, the power decreases, but not smoothly, but in steps.

There are several charging options available for Samsung devices today. Now it is not only 18 watts, but also 25, and even 45 watts. Support for higher indicators was carried out not in hardware, but at the firmware level.

If a Samsung phone owner intends to use Adaptive Fast Charge for their device, they must additionally purchase a certified cable and adapter. By the way, there are also devices for car and regular fast wireless charging on sale. However, most Samsung smartphones support accessories that are compatible with the Quick Charge standard.

How Standard Charging Works

Let’s remember the main points: every mobile phone is powered by a rechargeable battery, and each battery functions according to more or less the same principle. It consists in the fact that the battery has two electrodes. positive and negative, anode and cathode. The electrodes are immersed in electrolyte. This is a special liquid that is a catalyst for physicochemical processes, during which the movement of electrons from the anode to the cathode occurs. When electrons move, an electric current is generated, which feeds the battery and charges it.

In disposable batteries, which cannot be recharged, the chemical reactions that trigger the flow of electrons only occur once. After that, the batteries become unusable. But in a lithium-ion battery with reusable charging cycles, as used in a smartphone, these reactions are renewable. During the period when the battery is gradually discharged, chemical reactions generate electricity. When the battery is recharged, these reactions, on the contrary, absorb energy.

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samsung g530 grand prime charging port replacement #softwarehardwaretechnology

Charging connector for iPhone 3, 3GS, 4, 4S

This whole list belongs to the 30 pin connector or Apple 30 pin. The iPhone charged quickly enough and there were no problems with it. But, we all love to do it quickly and very often we had to look at the cable in order to understand which side to insert the cable. A little annoying, but everyone got used to it and everything was fine.

Another problem appeared when the transition to the next species began. After forgetting your cable, you simply could not charge your phone.

Influence [edit | edit code]

Lightning was one of the first popular connectors that can be inserted from both sides. This was followed by the development of other similar reversible (reversible) connectors, for example, USB Type-C in the USB family [8].

Adapters [edit | edit code]

In addition to cables with Lightning connectors (at one end) and USB (at the other end), there are Lightning to microUSB adapters that are designed to connect devices with a Lightning connector (iPhone 5, iPod Touch 5th generation, iPod nano 7th generation, and iPad 4 and iPad mini) to microUSB cables to sync content and charge device batteries. Released Lightning to VGA and HDMI adapters [5].

Since September 2016, an adapter has been produced from Lightning to the classic TRS minijack 3.5 mm for connecting headphones, at a price of about 10 [6]. This adapter is included with iPhone 7 / Plus, iPhone 8 / Plus / X and is compatible with any Apple device with a Lightning connector and iOS 10 or later [7].

I think all Apple devices will have a Lightning connector for a long time. After all, it was made with the goal of serving for a long time and so far, it is used in a sufficiently large number of iPhones.

Technologies are developing and it is possible that very soon there will be no cables and connectors at all. Everything will happen wirelessly and it will be damn convenient. We will follow the development.

The real scourge for iOS device owners is Lightning cables. There are many of them, they are different, but not all of them can be chosen.

Let’s figure out the device of this seemingly simple accessory with a whole arsenal of secrets.

Sensor problems

Mechanical damage to the sensor not only prevents the selection of the required system command, but can also affect the arbitrary launch of unnecessary ones. If you notice that something incomprehensible is happening on the screen, most likely you have gotten the buttons stuck or the screen is damaged.

The main malfunctions why the tablet does not turn on

To effectively eliminate the problem, it is necessary to correctly identify its cause. Let’s analyze the most common problems faced by the owners of the Korean brand tablets.

Low battery

The battery charge affects the performance of the gadget. When it ends completely, the device turns off until the moment it is put on charge. With certain user settings, the system can disconnect the device from the network, restrict the operation of some applications and change the screen backlight settings depending on the battery level.

Mechanical damage

Falls of the device, damage to the case and screen, sinking of buttons. all this can negatively affect the operation of the system and the startup processes. Whenever possible, always use a tablet case and protect your device from shocks and drops.

Moisture ingress

If your device is not protected from moisture, spilling liquids on the screen or into openings can cause serious damage to internal mechanisms, from the screen cable to the motherboard. If you recently noticed that water or other liquid got on your device, this may be the reason that the device has stopped turning on.

Defective connector

If the attempt to turn on the tablet after charging is unsuccessful, check the operation of the charger or the connector itself. Try to connect a third-party cable. this way you will understand which part is faulty.

How to turn on your Samsung tablet

After we figured out the cause of the malfunction, it is necessary to eliminate it. In some cases, only a technical service specialist can help. In case of obvious damage, it is not recommended to undertake repairs yourself, especially when the device is still under warranty. When the problem is resolved, try to reproduce the following steps.

Micro USB Samsung

Perhaps the most common connector today. For over a decade, this connector has been installed in everything from wireless headphones to tablets. It is compact, fast and reliable enough. Has several standards:

Adaptive Fast Charge microUSB charging cable. proprietary current transfer technology with increased voltage up to 9v 1.67A which is equal to 15W. Fast charging Samsung microUSB for the company’s flagship line. Such chargers are used for Galaxy S7, S6, Note 4, Tab S and their modifications.

Normal cable for charging Samsung MicroUSB. at voltage 5v up to 2.1A current. Suitable for Galaxy J, A, Tab, Core, Grand, Star, Mega and other mid-budget product lines with Micro USB connector.

Important note! The South Korean manufacturer marks the wires with a small tag indicating the possible modes of operation. Faster Adaptive Fast Charge can be freely used with old equipment without the risk of damaging it, but the price of such conductors is higher.

Features of Samsung charging

Every owner of a smartphone or tablet from Samsung has probably come across a situation when it would seem quite high-quality, powerful and fast charging of another brand does not work correctly with his device. Why is this happening?

First, it must be said that the charger does not always work at full capacity. Like a power supply from a computer, it supplies the required current at the request of a gadget connected to it. This kind of protection is needed in order not to accidentally burn weak equipment by confusing adapters. Communication between the SZU and the controller takes place via the D-lines of the USB cable. All modes of operation are sequentially switched from the weakest to the optimal. So, the signal commands for Samsung equipment differ from the generally accepted standards. When connecting a third-party cable, the system simply does not recognize it and automatically switches to “safe mode” 5v and 0.2 amperes.

A similar technology is implemented in all types of connectors used by the manufacturer. On the one hand, it allows you to use Samsung‘s new fast chargers with old devices, and on the other. gives a lot of inconvenience to customers.

Samsung Tab

Long outdated tablet slot for thirty contacts. Very wide and bulky. Visually resembles a cord from an old iPad, with which Koreans were probably inspired in their time. It’s easiest with him. Today, only the original or a copy can be found on sale. However, both options work.

Samsung Galaxy J5 (2016) J510FN Charging Connector Replacement

USB Type C Samsung

One ring to rule them all! In the sense of one connector. The new universal standard designed to save you from the heap of cords in your bag. Laptops, smartphones, tablets, power banks, he can do anything. The bandwidth is much higher than the outdated micro USB, you can stick it in either side. But also not without surprises.

Original Samsung Type C cable. supports fast charging. Suitable for Galaxy S8, S9, Note 8, A8, A 2017, other tablets and phones with this type of connector. Voltages 5v, 9v, 12v and current up to 3A depending on power supply and battery capabilities.

Type C from third parties. it’s a lottery. For example, Hoco and Baseus wires are certified for use with Samsung and are fast. But there are no solutions from Remax, Nillkin and Xiaomi. When deciding to purchase such a product, consult the seller before purchasing.

How to choose a Samsung charging cable?

There are a huge variety of USB cables on the market today. Their can sometimes differ by an order of magnitude. How to understand all this variety and choose the right Samsung charging cable? Today we will try to answer this question in our article. Of course, in this text, we give tips for choosing the right Samsung charging cable. But these tips will also be relevant for equipment from other manufacturers.

What determines the charging speed?

To fully recharge the device, the current must fill its battery, just as water fills a vessel. The electric capacity of the battery is usually indicated in the characteristics. For example, the Galaxy Note 4 has 3220 mAh, which means a powerful three ampere power supply will recharge the phone in just an hour, right? Not. In addition to the power of the charger, the process is also influenced by the bandwidth of the cable.

Does cable length affect charging speed?

Yes, but in very different ways. For example, by extending the wire up to three meters without increasing the cross-section of the conductors inside, we can lose two-thirds of the energy. A good branded cord produced in accordance with the AWG standard practically does not lose up to two meters. We recommend buying them.

How are the charging connectors on Honor and Huawei phones called?

Before buying a tool for a gadget, it is important to know the name of the connector for charging Honor and Huawei phones. Technically, devices are divided into:

  • wired. micro USB, USB-C, Type-C;
  • wireless.
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Visually, the difference is in size. When choosing a cable for a model, use the cheat sheet:

  • micro. 8x, y3, 10 Lite, 7c, 7a, 6a, 5a, 4c;
  • type C. Nova 3, p20 lite, p20, p30, p8 lite, 10, 9.

The micro USB format is considered standard, as it is used in devices of 11 brands of mobile devices. The features of the format include:

  • dimensions;
  • use in the manufacture of materials that help to use the plugs without damage;
  • high speed of information transfer, up to 480 Mbit;
  • OTG mode support.

Regardless of the connector, a cable is used to restore the battery’s performance. Supplied in a standard set with the purchase of the device, and can also be purchased separately.

What is the connector for charging Huawei and Honor phones

What is the charging connector for Honor 4c / 5a / 6a / 7a / 7c / 8x / 9/10/10 Lite and Huawei Y3 / P8 Lite / Nova 3 / P20 / P20 Lite / P30 and how to fill the battery. the answer to these questions is needed owners of smartphones. A gadget is not only a means of communication, but also a means for working and doing business, collecting information. Charging your phone with a cable or contactless technology is easy.

What are USB cables for smartphones

The manufacturer of USB cables for gadgets is constantly being surprised by new technical solutions and practicality. To make it easier to choose, we present the classification of wires.

  • Multitool. suitable for owners of technology, there are several plugs that work simultaneously.
  • Stretch is a compact device that looks like a toy. The cable is hidden inside, when in use it is unwound, then hidden.
  • OTG. indispensable when connecting a smartphone to a printer, hard drive and other devices.
  • Type-C. Quick Charge (fast way) and transfer information at a good speed.

There are these kinds at the points of realization. The main thing is to choose the required format that is suitable for the device.

Samsung Galaxy Tab2 P3100 teardown

If you do not know what Samsung Galaxy Tab2 (P3100) disassembly is, then read this manual. it will help you. Samsung Galaxy Tab2 disassembly may be necessary if the tablet won’t turn on or charge. The battery is most likely defective. In this case, you need to replace it or charge it manually.

Damage to the matrix or touchscreen of this tablet most likely does not threaten you, because they are protected by Gorilla Glass. Also, inside this tablet there are many components that are connected by loops, so the Galaxy Tab2 can get buggy and junk due to broken contacts. So let’s get started.

Samsung Galaxy Tab2 teardown

The back cover is secured with multiple latches. Their location is shown in the photo.

It is best to use a plastic tool, a guitar pick, or even a credit card to release the latches. We start the procedure from the side of the tablet power button and move along the arrows as in the photo.

As soon as the cover has given way, you can continue to work without tools. The strength of human fingers is usually enough for Samsung tablet latches.

We remove the back cover of our tablet, releasing the last latches.

Sort the screws

Now it remains to unscrew 16 screws with a small Phillips screwdriver. The cogs are circled in red in the photo.

To remove the battery. it is necessary to disconnect it from the board. Generally speaking, it is better to do this from the very beginning, because metal cogs like to fall directly onto the board and burn electronics.

Now we remove the speakers by carefully disconnecting their cables first, also with a plastic spatula.

Next, you need to disconnect the cables of the video camera, display, volume buttons, headphone jack, etc. In general, carefully disconnect all cables visible from this angle from the main board.

The board itself must be removed by freeing it from the slots in the bottom of the tablet.

Cleaning the connectors

You can now replace parts or clean the connectors with isopropyl alcohol if they show oxide or tarnish. To remove the headphone jack, you need to unscrew the two screws with a Phillips screwdriver and remove the ribbon.

Now we see the headphone jack itself, a video camera and a board with a sensor.

If necessary, remove the side volume buttons.

At this, the dismantling of the Samsung Galaxy Tab2 P3100 has been successfully completed. The assembly of the tablet is done in reverse order with the same non-trembling hands. If you have any questions, ask in the Комментарии и мнения владельцев, on the forum and subscribe to blog updates at the top of the page. All photos are taken from the official English-language Galaxy Tab 2 disassembly guide.

Pros and cons of wireless charging

We figured out the principles of the technology. Now about its advantages:

  • there is no need to constantly connect the smartphone to the charging cable. You just need to place the device on the station and turn it on;
  • When using wireless charging, the state of the smartphone remains better than in the case of wired charging. And this is due to the fact that the cable connector does not wear out;
  • smartphones that support Qi have their own cooling system. It protects the battery from overheating. At the same time, there is a ventilation system on the body of the product. Through it, the exhaust air is removed from the device;
  • Samsung charger fits any model that supports Qi.

Despite all the advantages, such charging also has disadvantages:

  • The charging station transfers energy to the battery 2–3 times slower than using a cable. And this significantly increases the time spent on food;
  • during charging, the user cannot move the smartphone away from the station more than 3-5 cm, which creates certain inconveniences. In addition, the battery recharge rate is slow, so the phone will not be able to perform resource-intensive tasks.

Wireless charging technology on Samsung phones, which models support

Today, there are so many household appliances in apartments that the wires literally entangle the walls and get in the way. In this regard, Samsung is releasing phones with wireless charging. That is, in order to connect the gadget to power, you just need to install it on the charging station. Next, let’s take a look at how a wireless charger works and which Samsung Galaxy smartphones have it.

Which smartphones support wireless charging

Samsung is among the leaders in the number of Qi-enabled smartphones released. Here is a list of Galaxy phones that come with it:

  • Note 5, Note 8, Note 9;
  • S6 / S6 Edge;
  • S7 / S7 Edge;
  • S8 / S8 Plus;
  • S9 / S9 Plus;
  • S10e / S10 / S10 Plus;
  • Note 10 / Note 10 (Note 10 Lite. no);
  • Z Flip;
  • Fold;
  • S20 / S20 Plus / S20 Ultra.

Accordingly, other Samsung Galaxy smartphones do not support wireless charging. Including the following Galaxy models from the list:

  • A8, A10, A30S, A31, A40, A41, A50, A51, A71;
  • M21, M31;
  • J3, J5, J7, etc.

Note! Even if your phone doesn’t support Qi technology, it’s easy to fix. There are special receivers for Qi, which are installed under the cover of the gadget or case. With their help, the gadget can be charged wirelessly.

How wireless charging works

The technology of its operation is based on the principle of electromagnetic induction. And the standard describing the technology is called Qi.

The charging station is connected to the mains and converts the energy into an electromagnetic field. To receive energy, a Qi-receiver must be installed inside the gadget. The material of the phone case is also of great importance. Often models that support Qi technology have a glass or ceramic back cover.

How to use Samsung Wireless Charger

The principle of operation of Qi technology is quite simple. In order to use it, you do not need to install additional software or special applications. Algorithm:

  • put the smartphone back cover on the center of the station. A notification will appear on the screen about the estimated completion time of the process (depending on the conditions);
  • at the end of charging, disconnect the gadget from the power.

Observe the following precautions when powering the battery from the station:


  • do not connect the phone to the station if there is material between them that conducts current (magnet, metal, etc.);
  • use only original chargers, as Chinese fakes can harm the battery’s performance;
  • do not put your smartphone on the charging station in a case if it contains a card with a chip, RFID tag, etc.

It is also not recommended to perform resource-intensive tasks while charging (for example, run games at high settings), since the battery will quickly overheat.

As it turns out, wireless charging is easy and convenient to use. If the speed of battery replenishment is primarily important for you, then we recommend using a cable and an adapter, since the Qi standard is inferior to a classic charger in this indicator.