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 in this 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 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 a 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 mains 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. Even though 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 answer an important call, receive text message or 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 body 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 computer 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 can 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 went great.

Modern phones have improved significantly, but users have to pay for new features for a short time. autonomous operation. If you constantly use your smartphone for entertainment, browsing the Internet or making phone calls, the battery usually runs out in half a day (5-7 hours).

A message appears on the screen asking you to connect the device to electrical network, and here a problem arises - often there are no free sockets nearby. You can always recharge your phone from a computer or laptop - just use the USB port. We will look at the advantages and disadvantages of this method.

Arguments for charging from a computer:

1. Ability to stay connected. Sometimes you need a few percent of charge to make an important call or send a message. All you need to do is connect your smartphone to the nearest computer and recharge the device’s battery.
2. Convenience. If there is a computer nearby with several free USB connectors, there is no need to look for a free outlet or install an electrical power strip.

Arguments against charging from a computer:

1. The threat of virus infection. If you connect your smartphone to someone else's computer, you can accidentally receive a dangerous file - a virus. To insure against the problem, before connecting, open the phone settings section and select the “Charge only” mode. This function blocks the transfer of information.
2. Slow charging. Computer USB connectors are not able to provide the required level of current for charging mobile phone, so the battery charges slowly. Sometimes you need to wait several hours for your smartphone to reach at least 50 percent charge.
3. Battery wear. Some users have noticed that when frequently recharging from a computer, the smartphone battery begins to discharge faster. That is why phone manufacturers recommend using original chargers to fill the battery with energy.

The difference between charging from USB 2.0 and 3.0 connectors

Most modern computers have advanced USB ports 3.0. This connector allows you to charge phones faster thanks to an increased current of 900 mA. The outdated analogue (USB 2.0) had a rating of 500 mA, which is why smartphones were charged from computers very slowly. If it is important to quickly get a few percent charge, connect your phone to a modern USB port (3.0). As a rule, such a USB port is blue inside.

What if the USB port stopped working after charging

Sometimes the phone puts a lot of load on the USB port, and it stops working, as if it freezes. In such cases, it is also possible that the message “The USB device is not functioning properly and has exceeded the power limits for its hub port” may appear. Then it is better to disconnect the phone from the computer and it is better not to charge it from it. In the window with a message about the problem, click the “Reset” button, if there is one.

But even after stopping charging, the USB port may still not work. In this case you can:

But if this does not help, then disconnect the computer completely from the power supply. If this is a laptop, then it is also better to remove the battery for 10 seconds and put it back. Now turn it on and check.

Conclusion

In total, in 99% of cases you can recharge your smartphone from a PC or laptop without any fear, especially if you need to make an important call. I recommend using this feature when necessary, not all the time. Otherwise, there are possible, albeit unlikely, risks - infection of the device with viruses and rapid depletion of battery resources.

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 a USB output connector, which has 4 contacts: two is 5 Volts, is used as a charger. direct current and two informational ones Data + and Data - . The device being charged, for correct charging (the task is not to overload the charger, to ensure the fastest possible charge, not to use an unidentified or weak charge), tries 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 charging device.

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 a USB output can usually deliver significantly more current than a 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, APP Charger programs, which help charge devices faster by receiving USB port current greater than 500 mA (probably will not work on any motherboard).

Quick Charge 2.0 - Qualcomm technology that uses 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; compared to 2.0, the charging algorithms are mainly optimized; 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 situation when the battery on a smartphone runs out and there is no way to charge it is critical for many. That is why it is very important to find out why the phone is not charging and choose the most suitable one. best option fix the problem. The instructions are suitable for all models and brands: iPhone, Alcatel, Asus, Lenovo, Phillips, Prestigio, Sony Xperia, HTC, Samsung, Xiaomi, Umidigi, Leagoo, Doogie, Huawei, HomTom, etc.

The charging process involves several things at once: the charger, consisting of a plug, tip and cord, as well as the battery itself. That is why, if the smartphone does not charge and does not accept energy from a standard or new purchased “Chinese” charger, we check each unit separately.

1. Damage or clogging of the connector.
2. The cord comes off (play) or the plug does not match the socket (for example, micro-USB is not suitable for Type-C and Lightning).
3. Software glitches.
4. Fracture of the wire, “fragmentation” of the wire.
5. Using dubious Chinese “crafts” for 20 rubles, the veins in the cheap versions are very thin and break with little impact.
6. The wire is too long; the shorter the length (30 cm is ideal), the less current loss. But here again it all depends on the quality.
7. Battery malfunction (swollen, overheated, deteriorated due to age).
8. Burnt-out power controller or protocol incompatibility.
9. Heavy CPU usage, such as heavy gaming or watching 4K movies.
10. Failure to comply with temperature conditions. The battery replenishment process does not occur when sub-zero temperature, .
11. They forgot to peel off the protective sticker after purchasing a new gadget.

If the phone charges normally, but quickly discharges, the battery is temporarily worn out. The standard battery life is from 3 to 5 years (equivalent to 300-500 charge-discharge cycles), after which it begins to discharge a couple of hours after charging, or does not accept it at all.

There is another factor: a virus infection has occurred that causes problems in the power supply system.

Sometimes it shows that the charge level is increasing. But in reality, the battery does not take or does not respond to the supply of energy and after disconnecting the cable, the voltage sharply drops to zero.

Diagnostics

For self-diagnosis, take the test. The virtual assistant will identify the problem and tell you what to do.

Not charging

To understand why your phone is not charging well or why the power indicator is not displayed on the display, you need to follow a few simple steps:

1. Take a non-native charger and connect it to your smartphone.
2. Change USB cable to a new one (pay attention to the connector, 4 main ones are currently used - USB Type-C, micro-USB, Lightning and legacy mini-USB).
3. The indicator lights up, which means the problem is a charging fault.

If the other charger does not work and does not bring the charge level to full, there is a high probability that the problem lies in the software, battery or cell phone connector.

The first step is to carefully clean the nest. If this does not help, it is recommended to take the gadget to a service center, because... It will be difficult to fix it yourself.

Faulty power supply - it can be repaired by the owner himself by purchasing required part for replacement, but due to the low cost of USB cords, it is more logical to purchase a new one.

How to check the connector

Diagnosing the condition of the USB cable socket involves examining it in bright light using a magnifying glass. If it is dirty, you should clean it with a thin brush dipped in alcohol. Dust and debris create poor contact between conductors and interfere with the flow of current.

What to check:

• The nest does not wobble in the body.
• No contamination observed.
• There is no visible deformation of the module (bent contact groups, changes in geometry, etc.), and the smartphone will not respond to charging.
• Visually there are no drops of water or moisture.

If this is not the case, you will have to look for the reason in another part.

How to check the battery

The above method showed that the smartphone does not receive energy not due to a burnt-out memory, but due to a damaged cable. If the cable is turned on and it says that charging is in progress, but the phone does not charge, there is a high probability that the faulty battery needs to be replaced.

• The battery is swollen and/or protruding from the case.
• The battery is not fully and slowly charged, no more than to 60-90 percent - only replacing the module.
• If the charger is working properly, the cell phone does not charge or does not see charging, although the process is ongoing.
• Download the utility to check the remaining capacity.

This means you need to test the battery: simply replace it with another analogue and see if the indicator lights up when connected to a power outlet. This method will not work for Apple technology!

Signs of a virus infection

The main symptom when the software is infected malware, is the lack of indication. It can also freeze constantly, and if previously the battery lasted two days, then after getting a virus it will be discharged in 5-12 hours (i.e. a very long time).

To troubleshoot problems, you need to scan your phone using an antivirus program. If infected files are detected, they will be deleted automatically, and if this is not possible, you will have to clean the system manually, removing the application itself that contains the viruses.

How to charge without a standard charger

In any store cell phones You can find a universal charger suitable for both smartphones and iPhones. The battery can also be any.

In another way it is called a “frog”, and using such a charger is very easy:

1. We insert the battery into the clamp, the “plus” and “minus” contacts must match.
2. We insert the “frog” into the outlet and leave it to charge for several hours.

Question answer

% stands still does not add

Or the process only runs in the off state:

1. There is not enough charger current. For example, the charger produces 250 mAh with the required 1000 mAh.
2. The USB cord is of extremely low quality and does not allow voltage to pass more than 4.5 volts, which is critical.

Cannot charge from computer/laptop via USB

• Most likely there is not enough current, for example due to artificial limitations on the computer's motherboard. Or the restrictions are triggered at the software level, you will have to look for new drivers for the USB hub.
• This can happen if the cord is old or “works every now and then.” Somewhere in it the contacts are shorting. This is especially true for “shaggy” iPhone cables. In general, buy a new one.
• Another trivial reason that is relevant for different variations of Type-C is protocol incompatibility. Each Type-C contains a small chip responsible for data and energy transfer. At the same time, there are a bunch of standards, for example, some cables can “refuel” a full-fledged laptop battery, while others can only exchange data.
• It happens that the USB connector in laptops is longer than the standard connector from a smartphone, and the hardware simply does not touch.

From the cigarette lighter

If car charging from the cigarette lighter does not work, a similar diagnosis is carried out (see previous sections), because The principle of supplying energy to the battery is the same everywhere.

From the radio

From power bank

Standard situation, most often the PowerBank does not have enough output current. Or it's time to buy a new power bank. In the case of Type-c, it may not allow charging the battery.

From wireless charging

Not all models support the wireless power transfer function. First, make sure that the manufacturer has included this functionality in your gadget.

If you are sure that wireless transmission installed at the hardware level, but the charge does not work, you need to check:

• Whether the station is not connected to the network.
• Does the device move/shift from the center of the site?
• Not wearing a thick case or magnetic dock.
• The cable is not inserted or data is not being transferred to the computer.

If this doesn’t help, check the installation itself on another device; if everything works as it should on it, take your device to the workshop. Very similar to the problem with the wireless microcontroller.

Writes moisture detected

There are two options here:

1. The device fell into water or another liquid (beer, wine, juice, tea, toilet). What to do is written.
2. There was a strong temperature difference, for example, we came from a cold place to a warm room and condensation formed on the board. Wait a couple of hours and everything will be back to normal.

Low or high battery temperature

The operating temperature of modern batteries is from +3 to 45 degrees Celsius. If these values ​​are exceeded, the controller limits the flow of energy to the batteries. It is necessary to cool/heat the phone.

There was a strong blow or fall

Lithium-ion “products” do not like strong mechanical impact, and can fail due to strong impacts and falls. This is just replacing the module with a new one.

After a long period of non-use

A deep discharge has occurred - use the “frog” to “push” and try to revive the battery.

To extend the life of your iPhone or Android smartphone, you need to follow these recommendations:

• Do not let the gadget fall.
• Do not discharge the battery too often (no more than once every 2 months) completely to 100 percent. It is ideal to keep the level from 20% to 80%.
• Do not abuse the use of a low-power universal charger, even a new one.
• Install anti-virus protection on your phone.
• Do not leave the device in the cold or heat (operating temperature from +3 to 45 degrees).

Conclusion

Many owners of smartphones (both Android and iOS) encounter the problem of lack of charge, but to carry out diagnostics it is not necessary to take the phone to a service center: just use the instructions to find out the reason.

If the gadget does not charge due to a battery malfunction or has stopped receiving power due to the USB connector, it is recommended to contact a technician. In other cases, it is enough to replace the damaged charger with a new one, ideally an original one.

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