If the charging circuit of your device is working properly (it charges normally from another charger), but it does not charge from the charge you need (for example, through a cigarette lighter), you can do the following:
Replace/repair/remake the cable from the charger to the device being charged (there is no point in saving on the quality of the wire; often a shorter and thicker cable charges faster)
Replace/repair/modify the charger (a charger with a more powerful current may charge faster, instead of the charger you can use external battery some have more powerful outputs - about 2 Amperes, which can help if the device is completely discharged)

More details
Often the problem is just a USB cable with high resistance (for example, the wires are thin and long). Sometimes the cable may be partially broken (one core remains intact or the broken wires are attracted to each other only by insulation) in this place the resistance increases sharply.
When you try to charge with a high current, the voltage drops significantly at a high resistance and becomes insufficient for the device being charged. Such wires may be suitable for data transfer and charging low-current devices, but not for charging devices that require high current. If it is not possible to replace the wire, you can significantly shorten it or cut off the connectors from it and solder them to a wire of a larger cross-section; it probably will no longer work as an information cable.
If the device being charged is turned off (put into sleep mode), charging will go faster, or will be possible at all.
Most often, a power supply with USB connector at the output, which has 4 contacts: two are 5 Volts DC and two informational ones Data + and Data - . The device being charged, for correct charging (the task is not to overload the charger, to ensure maximum fast charge, do not use unknown or weak charging) attempts to calculate the characteristics of the charger through the state of the Data + and Data - signals.
Accordingly, some manufacturers can install jumpers, resistors, and more complex solutions between the contacts of the USB charger connector, with the help of which the device will recognize the charger as original and charge. Without “seeing” the required states of information signals, the device will not begin to charge.
The Micro-USB connector has 5 contacts, an additional contact is most often used to recognize the fact of connecting a cable (for example, a USB OTG cable - it has a jumper between 4 (ID) and 5 contacts) and switching to master device (host) mode, in some models may affect the current consumed when charging the device.
If the rated power, voltage of the charger and other quality characteristics are suitable for charging your device, then the charger can be modified by finding the appropriate circuit.
You cannot cheat the charging circuit (or use a low-current charger in the case when the high-current device being charged does not have a charger power recognition circuit), you cannot use a low-quality cable, since there will probably be no charge anyway or it will take a long time, either the charger or the charging circuit may fail device being charged.

Maximum current consumed by power lines USB bus, should not exceed:
USB 2.0 - 500 mA;
USB 3.0 - 900 mA;
USB 3.1 up to 5A.
USB 2.0 is still the most common - by default, the device is guaranteed to consume a current of up to 100 mA, and after coordination with the host controller - up to 500 mA.
Power supplies with USB output can usually deliver significantly more current than USB port.
Often, to increase the current received from the computer's USB ports, a Y-type cable can be used, which allows you to receive power from two ports at once.

Ai Charger and APP Charger programs, which help charge devices faster by receiving a current of more than 500 mA from the USB port (probably will not work on every motherboard).

Quick Charge 2.0 - Qualcomm technology, using a more powerful charger and the use of higher voltage (Quick Charge 1.0 simply meant a more powerful charger - 5 Volts / 2 Amps)
Output voltage/current: 5V/2A, 9V/2A, 12V/1.67A and 20V
Power - about 18W
Quick Charge 3.0 is a Qualcomm technology, charging algorithms are mainly optimized compared to 2.0, the speed has not increased significantly compared to 2.0. Quick Charge 3.0 asks the device for the required voltage, which can be anything in the range from 3.2V to 20V in 200 millivolt increments. This provides a greater selection of available voltages.

Standards:
Battery Charging v1.2 Spec and Adopters Agreement (BC1.2)
IEC 62680-2:2013 Part 2: Universal serial bus - Micro-USB cables and connectors specification, revision 1.01
IEC 62680-3:2013 Part 3: USB Battery Charging Specification, revision 1.2

The phone does not charge from the computer - reasons and solutions to the problem

One of the main advantages of a smartphone, like any other portable device(tablet, laptop, mp3 player, smart watch) is the ability to hold a charge for a long time. However, sooner or later you have to recharge the device.

The following instructions will show you how to fully charge your camera's battery. Chargers can be purchased. . In this case, it is recommended to unplug and turn off the camera. Here are some pictures showing the preferred type of battery charging.

Electronics installed in the units determine how much current can flow during charging. The prerequisite for this, however, is that you have a charging cable with the appropriate connection for your mobile phone. The cable and power supply can usually be disconnected from new chargers. Also in this case, customers can simply disconnect the power from the cable and connect another one.

Not so long ago, manufacturers supplied their products with original connectors, and they could only be connected to an outlet or PC using a proprietary charger and cable. Fortunately, today almost all smartphones are equipped with a universal micro-USB port (most Android models) or USB type C (new models on Android and iOS).

If the voltage is outside the specifications, the smartphone simply does not charge. However, there are differences in the output power of power supplies. This is from 2.5 to 10 watts. This corresponds to current intensities from 0.5 to 2 amperes. The following applies: the longer the power supply, the shorter the charging process.

Try different chargers yourself

Therefore, it may even be useful to try power supplies from other manufacturers if you are unhappy with the charging speed of the included power supply. Many mobile phones don't often get maximum power from their own chargers.

Such universalization has made life much easier for the user. Losing or breaking a charger is no longer a significant problem - they are all interchangeable. In addition, it is now possible to charge your devices directly from computer USB ports, meaning you no longer need to carry a bulky power supply with you!

Some manufacturers even stopped including charging in the kit - just a USB cable and that’s it. But what to do if your smartphone refuses to charge like this? in a convenient way? Let's list possible reasons problems and ways to solve them.

The autonomy of today's mobile phones is not what is required and, as a rule, we have to boot our device every day if we want it to be fully functional. Either because we are in a hurry or for any other reason, we are going to give you some tips so that you can charge your mobile phone as quickly as possible.

Currently, battery life of smartphones usually does not occur during a day of normal use. Manufacturers are trying to counter the limitations of existing batteries by programming saving modes, with which we can deactivate functions or characteristics that consume the battery, but at a certain point we are not needed. Although in these saving modes we can extend the time battery life in some cases, it may happen that we forgot to charge the mobile phone and we need to use it in a short time.

Why can't my phone charge from my computer via the USB port?

Let's first consider the options in which there is no reaction to the connection at all. That is, messages do not appear on the computer and phone screens, and corresponding sounds are not played from the speakers. There may be several reasons for this.

The phone charges, but very slowly

So, you have ruled out all the reasons listed above, but your smartphone stubbornly refuses to charge normally without a charger. That is, everything is in order with the connectors and cables, you can connect to the computer normally, and it even sees the smartphone, but the charge level practically does not increase or even decreases. Most likely, you are faced with one of two reasons.

Activate airplane mode or turn off the phone

It's as simple as activating the device's airplane mode to disable all connections, which, by the way, consume a lot of battery. Another option is to turn off the device directly, since we will not turn on the screen, another of the sections that consume more battery.

Therefore, by activating airplane mode or turning off the screen, almost all or all of the power from the network will be designed to charge the battery, allowing for shorter charging times while increasing autonomy. We talked to you recently and we see that using a copy can be dangerous for us. Although there are original chargers that can get good performance, it is better to always use the original, as it was designed by the same phone manufacturer and should know perfectly well how to supply power to the device.

Recently I encountered a problem. The phone is charged from USB using the original cable that is included, but it cannot be charged from a similar Chinese one.

And something strange happens: the phone writes that it is charging, but in fact nothing is charging, the battery just runs out. It's some kind of nonsense.

Typically the copy has fewer components and less security, so in addition to not getting enough power and running slower, you may have significant security risks. If we can choose this option, the charging time can be reduced by 50%. To finish, just comment two tips that highly recommend keeping our battery in good condition and this will allow us to charge the battery 100% without slowing down the charging time. One of them is related to heat, as it is very important that batteries are charged at room temperature and not exposed to sources of excessive heat.

I googled it - I’m not the only one who has this problem, both in RuNet and on the Internet there are a couple of mentions of this problem, although without a solution.

My first thought was that the original cable had a tricky feature, maybe some kind of pull-up resistor, bypassing the specifications, in order to inform the phone about the “originality” of the cable. I called, but it was not confirmed.

This will allow us to extend the battery life and avoid other complications. Finally, it is also wise to perform battery maintenance tasks. This is what is commonly called battery calibration and consists of charging the cell to 100% and completely discharging it until the device turns off. To know for sure that the battery is fully charged, a good trick is to touch the charger and check that it is cold.

What do you do to boot up your devices faster? Of course, some of us have found ourselves in a situation where our phone is running low on battery and we don't have a charger handy, while at the same time desperately needing to stay connected to take an important call, receive a text message or receive an email. .

Then for some reason I thought that the inductance of the cable was interfering, the phone quickly turns on the charger, measures the voltage drop, is surprised by its strong drop and refuses to charge. To test this hypothesis, I opened the cable and placed the smoothing capacitance closer to the plug. The cable was thick and inspired confidence, but it turned out that the insulation was so thick, the conductors themselves were thin.

Before we get to the problem of thieves, we should note that not all chargers are as good for your smartphone. The Internet is full of complaints, most of the users who tried to charge their expensive phones with non-original chargers or adapters. In some cases, the phone ended up becoming an expensive paperweight. At times it is already very strange, the people who were holding his phone were seriously injured or even died.

Unfortunately, these may not just be accidents. We doubt you want to test your phone's durability using this method. Locking your phone will save you from being exposed, but will it seriously prevent you from using it when you're charging it?

I soldered it and checked it - it didn't help.

Then I wandered onto this topic. User Rob provided interesting data:

SONY ERICSSON W 810i - - - - Battery BST-36, on the original BST-37 the currents are almost exactly 2 times higher. - 4.4 v - 0.0ma/the phone does not see the charge 4.6 v - 0.0ma/the indicator is already with lightning, that is, it sees the charge, but in fact the charge current is 0. 4.8 v - 50.5ma/Very long to charge 5.0 v - 107.8ma/. ... 5.2 v - 110.0 ma/ current almost did not increase 5.4 v - 180 ma 5.6 v - 225 ma 5.8 v - 240 ma 6.0 v - 270 ma 6.2 v - 340 ma 6.4 v - 500 ma 6.6 v - 0.01 ma/ tel goes into failure - "charge error! Not a standard charger, stop charging immediately!"

Data size varies depending on phone platform and operating system host system, but in any case, not only is it loaded, but it is also found that they are transmitting data such as device name, provider name and serial number. Of course, you think that there is no problem with the transfer of data, but there is because after analyzing the public information of a particular operator, we saw that much more is allowed than indicated in the system.

You can also send calls to any number, and if you're roaming, those calls can leave you red very quickly. Depending on your carrier, this mode also allows you to instantly access any type of application, including malicious ones.

I measured the voltage at the connector under load - 4.46 V. At the same time, at charging 4.96 V. I measured the resistance of the wire - 2.2 Ohms! The original cable has a resistance of about 0.3 Ohm. Bingo!

The picture is this: the Chinese saved on copper and installed thin conductors in the cable. This does not in any way interfere with data transfer and the operation of most devices, but when you try to charge via a cable (the maximum current from one USB port according to the standard is 500 mA), the voltage U=I*R at the wire resistance begins to drop. As a result, instead of the required 5V, the phone receives 4.46V, which is why the electronics behave in such a strange way.

All of the above is possible even when the smartphone is locked! You will never know this before you connect your device, so don't do it. We recommend that you charge the battery before using it. If the battery is completely discharged, it may take several minutes to start.

Select a configuration option: compatible PC or mobile device

Batteries to receive detailed information about the battery, its battery life and small battery notifications. Both methods require an Internet connection. Everything is ready to start, have fun!

What are the dangers of charging your mobile phone in public places?

At an airport, bar, or rental car that connects ports available to charge your smartphone's battery, the security of your personal data could be compromised.

I cut the wire and shortened it to 10 cm, to carry it as an adapter in my backpack. Shortened to 10 cm, charging worked great.

If it happens to you that charging in progress, but the smartphone is not charging, read the article. It describes all the problems and ways to solve them.

The main advantage of any smartphone, like any other mobile device, is to keep the battery charged for a long time. But you still need to recharge the gadget.

• Formerly manufacturing companies similar devices equipped mobile devices with special original connectors.
• The device could only be plugged into a power outlet using a proprietary “charger” provided by the manufacturer.
• Now mobile devices are equipped with universal micro-USB connectors on Android devices and USB type C on new gadgets with latest versions Android and iOS OS.
• This helped make using the device simple for the user; losing the cable is no longer a problem, since you can charge the device from a PC. But what should you do if you can’t add charge to your smartphone using this charging method? Look for the answer further in the text.

Why can't my Android phone and iPhone charge via USB from a computer, laptop, or from a wall charger?

If you connect your smartphone to charge from a computer or laptop, and the charging percentage does not increase, there may be a variety of reasons. Let's take a closer look. It is worth noting several main reasons why Android phones and iPhones do not charge via USB from a computer, laptop, or from charging from the mains. Let's look at them in more detail:

System glitch in the device program.

• If the OS is frozen, the controller does not give a command to transfer current to the battery.
• Getting rid of this problem is simple: restart the device by holding down the On/Off or Home key for a few seconds.
• Then turn on the device and connect it to your computer to charge.

The problem is in the firmware.

• This problem often occurs on iPhones. If you recently updated the firmware, and suddenly the phone stopped charging, then do a rollback.
• But to perform this action you need backup which you should have done earlier.
• This recovery is done through iTunes. Just click in the program " Restore from copy».
• If you don’t have a system in reserve, then reset it to the manufacturer’s settings. But keep in mind that in this case you will lose all photos, music and video files.

Charger fault

• The charging unit can quickly break down, especially if it is Chinese and cheap.
• Expensive smartphones need to be charged only with a branded unit. The use of “left charging” can have the most unpleasant consequences: rapid wear of the battery, breakdown of the device, or even its unexpected explosion.
• Try connecting the device to the computer using a different cable.

Lightning cable failure

• Even if such a cable looks great on the outside, it may still be faulty.
• Try using a different cable of the same type. If charging continues, it means the old cable is faulty and you need to buy a new one.

Lightning port glitch

• This problem often occurs with iPhones.
• This is not always a breakdown. The problem may be caused by dust and dirt. This will be visible if you look into the port.
• If you can see that there is a lot of dust in the hole, then carefully remove the dirt from the port with a toothpick. The contacts will clear and begin to conduct current.

USB port is not working

• The USB port on your PC or laptop may not function or may have low current or power.
• Connect to a different port or charge your smartphone from a wall outlet or PowerBank.

Fault in parts (battery, cable, etc.)

• If you have already followed all the tips, but the phone still does not charge, then some part of it is faulty.
• It happens that water gets into the smartphone and it stops functioning normally.
• In this case, you need to take the device to a specialist for service. They will find the problem and fix the problem.

Lack of charging current

• You can find out using a tester, usb-doctor, or using special program on the phone.
• If you cannot do this yourself, contact IT specialists for service.

Thin cable

• Perhaps the wire is too thin and does not conduct the current required.
• Try using other wires with the charging box instead of charging from the computer.

Low power in the motherboard circuit

• It's unlikely, but such cases do happen. Basically, manufacturers adhere to the standard, but such a malfunction must also be taken into account. If the manufacturer still does not announce the function of charging devices via a USB port, then you should not count on powerful charging currents.
• Contact a professional if you suspect this problem.

Bus feeds

• If your computer is designed only to be turned on from peripherals, and not to power gadgets, there may not be enough power for charging.
• You should review your BIOS settings. But it’s difficult to do this on your own. Contact the specialists.

If you doubt the quality of USB ports, then you should purchase a special tester for the charging cable. Its price is small (up to 250 rubles), but you can always find out what is causing the problem.

The phone shows that charging is in progress, but is not charging: what to do, how to charge?

When mobile device does not charge - this is a disappointment for the user, especially if charging is in progress, but the battery remains empty. In this case, panic begins, because modern man without a phone is like without hands. What to do and how to charge if the phone shows that charging is in progress, but is not charging? Here are the possible causes of this problem and ways to resolve the situation:

• The charging unit does not function. Try charging the device through a different wire and unit. If it doesn't help, then that's not the problem.
• Faulty phone system. If you are sure that the wire and charging unit are working properly, and the smartphone says that charging is in progress, but the battery is empty, then you should contact a specialist with the device. In this case, you need to flash the device or replace the input.
• The battery has failed. The battery in the phone cannot be repaired, and if it malfunctions, you need to buy a new battery. If this part is built into the smartphone, then you will have to purchase a new device.
• Open applications and other services. If you put the device on charge and did not close the applications, and also did not turn off the services, then charging will proceed slowly as the power supply is running open source software. Disable all applications, programs, services, and especially WI-FI.

It often happens that the phone is charged for a long time, for example, all night, and after that the battery charge is scanty - 1-2%. In this case, the problem is a faulty battery or power controller. In the first case, you can replace the battery and continue to use the device, but in the second, you need to take the device to professionals for repair.

Video: iPhone4 shows charging, but does not charge. Repairing the battery cable

Many who are the owner Apple technology They will agree that sometimes it can be very capricious and forces you to buy only original devices for it. But all this is not connected with the idea of ​​extracting as much money from you as possible (although there is some truth in this too), but with ensuring the long service life of the device. Today I will look at the following problem: the iPhone does not charge in the car via USB. I’ll also tell you how to solve it and why it occurs in the first place.

iPhone won't charge in car using radio or cigarette lighter - solution

As I wrote above, Apple technology is capricious for a reason. If your Android phone can easily be charged from the cigarette lighter, but your iPhone flatly refuses to charge, then there may be several reasons:

1. Unstable voltage
2. Non-original device (cable or device that is installed in the cigarette lighter)
3. Radio tape recorder
4. USB connector

Now let's look at each problem in order. In the first two cases, the device is most often to blame because it is unable to maintain the normal current for charging. Usually these are “No name” manufacturers, so buying a branded cigarette lighter connector should solve the problem with charging your iPhone. Many car owners speak well of the Belkin charger. In rare cases, the problem may lie in the wiring of the machine itself, and here you need to contact a specialist. Recognize this problem An ordinary multimeter, which costs from 200 rubles, will help you. You measure the voltage in the cigarette lighter itself, after which it will be clear whether the problem is in the wiring or the cigarette lighter of the car or in the device. which you bought.

The next problem why the iPhone does not charge in the car via USB may lie in the radio. You can find out its presence using the same multimeter. By measuring the voltage everything will fall into place. For normal operation The device needs 1 Ampere; if the measuring device produces more, there is nothing to worry about. It’s another matter if you receive less than 1 ampere, since such voltage may not only simply not charge your iPhone, but also damage the battery or render it completely unusable.

And the last reason why the iPhone does not charge in the car via USB is the USB connector itself. Namely, if you have USB 2.0, then the iPad, for example, will charge, but the iPhone will not. The solution to this problem is very simple - buy a device with a USB 3.0 port. It’s worth saying that any consultant will assure you that all devices are currently compatible with USB 2.0, but this concerns data transfer. That is, USB 2.0 has a much lower speed than USB 3.0, but the current strength of USB 2.0 is 500 mA, while USB 3.0 is 950 mA, which is why the problem of charging an iPhone arises when using an old generation USB port .

Precautions when using Apple phones

In conclusion, I will say: in order for your iPhone to last a long time, it is advisable to use original chargers, usb cable. If you use memory from other manufacturers, try not to use Chinese analogues and always look at technical specifications. This will save you from re-purchasing, as well as your phone from being sent to a workshop. Using cheap analogues, you damage the battery, and there is always a risk of simply “burning” the board on your iPhone.