Power bank does not work. The power bank charges the smartphone slowly (it only charges when it is turned off). How to know if the external battery is charged

The battery of a modern phone is a weak link, as the charge is depleted very quickly. The solution to this problem was external high-capacity batteries.

But constant use of such products can lead to their breakdown. In this case, it is advisable to trust the repair of the power bank to an experienced specialist.

Charging rules

External batteries are practically no different from the phone’s built-in batteries. But they are configured to release energy. In order for the system to serve for a long time and reliably, when charging it you should follow several rules:

1. It is advisable to immediately charge new batteries to 100% capacity. After this, the battery is completely discharged 2-3 times and charged again to full.
2. It is not advisable to use a design that has not fully filled the capacity. Experts recommend charging the device until it reaches 100% capacity. Please note that if the indicator shows this value, you should leave the external battery on for a little longer. This is necessary because “drip” charging is carried out.
3. Do not completely discharge the battery during operation. It is advisable to start recharging it at 20% capacity.

We repair the battery

Very often these batteries are not charged from the mains, which in turn does not allow it to be used to operate the phone. There are several reasons for this:

1. Damage to the entrance. To determine whether this is the case, you need to disassemble the battery to gain access to the internal microcircuits. Then use a multimeter to check if the current is coming from an external source. If this is not the case, you need to completely change the battery charging socket.
2. Complete exhaustion. Very often, users drain the battery to 0%. Therefore, when connecting the charger, the controller sees this value and simply thinks that this device just missing. Decide this problem quite simple. You should remove the internal battery and charge it directly. For this you can use so-called “crabs”, suitable for all types of batteries. When the system has recharged a little, you should insert it inside the case and try charging with it.

Please note that there are many other reasons why an external battery may fail. Therefore, it is better to trust its repair to experienced specialists. They will quickly determine the cause, as well as the need to replace all faulty parts with new ones.

Every owner of a smartphone or any other portable device is familiar with a power bank charger (“power,” as it is colloquially called). It is very convenient to use because the phone can be recharged at any time. However, many have to face the problem when the power bank does not charge the phone for some reason, even if it is strictly followed. It may also happen that the device is working very slowly. In any case, do not rush to contact repair services: you may be able to eliminate the cause yourself.

What could have happened

Before you start dealing directly with the power bank, you should understand whether this is the essence of the problem. It is quite possible that it is the phone that is working poorly, and not the device for charging it. First of all, connect your phone to another charger and watch what happens.

The USB cable used may also be the reason why the power bank does not charge the phone: for example, the cable is damaged or kinked too much . Therefore, you need to carefully examine it for external damage. If they were found, all that remains is to replace the old cable with a new one. Or immediately purchase a higher quality USB device.

When the problem is in the device itself

If the power bank was recently purchased or has not been used for a long time, You can also try recharge it for 8 hours . The fact is that while the device was lying in the warehouse and not being used, chemical processes inside it could have slowed down considerably, which is typical even when they are not working. It is quite possible that this is why the power bank does not charge the phone. When it is “boosted,” the substances that slow down the battery will disintegrate, and the device will produce the required amount of energy.

It happens that at first the charging process goes on, and then begins to be interrupted. Since all power bank chargers are made in China, it is not surprising that the capacity indicated on the charger does not correspond to its actual level. Of course, a power bank with a real capacity of 2000 mAh will not be able to fully charge a smartphone whose battery has a capacity of 3000 mAh. To the question of what to do next, there is an extremely simple answer: purchase a charger with a capacity at least twice the phone's capacity .

There is another reason why the powerbank first charged and then stopped charging the phone. Often the controller turns off the process if there is overheating or some kind of malfunction. Contacts may also be weak or faulty. In these cases, it is advisable to contact a repair and service center.

Many owners are forced to charge smartphones from a power bank only when the devices are turned off: otherwise they charge very slowly or take much longer. Naturally, in this way it is impossible to simultaneously charge the phone and search for something on the Internet, this is very inconvenient.

Low charging speed may have the following reasons:

• the controller has failed , or it has an internal defect;
• the initial current is insufficient (the power output current is 1 A, and the phone is 1.5 A);
• The cable is thin, poor quality - reduces the voltage indicator;
• Several devices are connected to a phone with a small battery capacity .

First of all, you need to do the following: check the output current readings on the connectors of the charger and phone . If the amperage is different, the device should be changed. The thin cable needs to be replaced with one whose quality and conductivity will be better - you can buy it in specialized stores or order it online.

In order to know what to base your assumptions on why the powerbank does not charge the phone, it is advisable know exactly the capacity of both the device and the charger , without relying only on the inscriptions of Chinese manufacturers.

What else can interfere with full charging?

Some users like to download intensive applications and games from the Internet onto their devices. This means that the phone will now take much longer to charge. In the first days this is not noticeable, but later it can greatly affect the charging speed. In addition, if the powerbank charges the smartphone poorly, you can try calibrate the battery of both it and the phone (discharging to zero and charging the devices again). It is recommended to do this three times and, if there are no other problems, the essence of which was described above, this method will be effective. There is no need to contact the service center.

Sometimes, when the smartphone is actually fully charged, the program incorrectly displays the charging indicators. For a more accurate check, you can try to charge the phone yourself simply from a 220 V network.

If your phone won't charge at all

It happens that the purchased power bank is simply incompatible with one or another device model.

The main signs of such incompatibility are that a natural accumulation of energy occurs in the device when it is plugged into the network, it begins to blink, but nothing happens to the phone. There is only one way out: try connecting a phone of a different model and check how charging will happen. If the power bank charges another device without any problems, you will have to exchange it for another, having previously clarified the issue of compatibility with consultants.

If everything was fine with the charging process before, and suddenly the power supply stops working, the problem may lie in one or the other battery, as well as in the condition of the connector and board contacts. Errors in operation and mechanical damage, of course, can also cause failure of a particular device. If the phone is already more than three years old, you should keep in mind such a phenomenon as the natural percentage of battery wear, and then it is not at all surprising that.

Of course, before you get upset and contact the service center about problems with your power bank, it will never hurt to carry out a few simple and accessible steps yourself. At least in this way it will be possible to find out what the cause of the malfunction may be, and, based on this, make the appropriate decision.

So finally you have mobile charger (Power Bank).

Congratulations! Buy Power Bank in Ukraine- a very correct decision!

(If you are just thinking about such a purchase, where will you order)

Of course, you would like the charger to last as long as possible and keep your gadgets happy forever. To do this, you need to know some features of Li-Ion batteries and follow a few simple rules uses:

1. After purchasing an external battery, immediately charge it fully.

The ideal charging process (both the PowerBank and the battery of your phone/tablet) also includes the so-called “trickle” charging - charging the gadget for some time after the indicators show that the device is 100% charged, while the charge continues very weak current.

Special applications have been created for smartphones and tablets that recognize “drip” charging:

http://bit.ly/battery-doc - for Android

http://bit.ly/battery-doc2 - for Apple (the application is no longer available in the AppStore)

Previously, to find out when the “drip” charging was over, you needed special measuring equipment (ammeter, voltmeter - tester). How all this equipment works is known to a rather narrow circle of radio amateurs, and not everyone wants to delve into all these details (even for the sake of increasing the life of the batteries).

That is why they have become such a joyful and saving novelty for everyone.

With this little device you can see not only the voltage and current, but also the amount of Ah (amp/hour - the unit of capacity for all batteries) that has passed through USB tester. Therefore, you will always know the condition of the battery of your phone, tablet or, since we are talking about a Power Bank, Power Bank capacity.

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Usually Power Bank charging The current is 1-1.5A. The closer to the end of charging, the lower the number of Amperes. “Drip” charging is 0.1-0.05A. To ensure that your battery has maximum capacity for as long as possible, wait until trickle charging is complete. As soon as your USB tester will show 0.00A - charging is completely completed and the device can be disconnected from the network.

2. In order for your Power Bank to reach its maximum capacity, you need to do 2-3 full charge/discharge cycles.

Also, if in the future the Power Bank begins to discharge faster than usual, it is worth repeating this cycle of 2-3 repetitions and thereby rewriting the battery statistics.

3. ALWAYS charge Li-Ion batteries to 100%!

Try to never stop charging prematurely - only after the battery is 100% charged. Yes, many will say that “modern Li-Ion batteries do not have a “memory effect.” Yes, manufacturers also claim this. But, based on our practice and experience, this is not entirely true: in Li-Ion batteries this effect is much less, but still present (this applies to phones and any other gadgets).

4. Do not completely discharge the PowerBank (to 0%)

Modern Li-Ion batteries that come with mobile batteries don't require this. Moreover, their constant discharge to 0% reduces their service life. Charge the Power Bank when it still has 10-20% charge.

In external chargers Oh With a percentage indication of the discharge/charge level, this is very easy to find out; in devices with LED indication, you will have to do it “by eye”.

(devices with % indication can be found )

5. This point contradicts the previous one, but nevertheless it is also very important: completely discharge the battery from time to time (once every 1-3 months).

This allows you to reset the charge limits (upper and lower - calibrate the Power Bank).

6. If you do not plan to use the external battery for a long time, discharge it by about half.

Storing a fully charged (as well as a completely discharged) battery is very harmful to it and significantly reduces its service life.

7. Use only original mains chargers or those that have the required characteristics (if PowerBank It is recommended to charge with a current of 2A, then use a charger that gives 2A).

It’s worth mentioning separately about network adapters: They're in real trouble. Finding one that produces the declared current is a very difficult task. Even if you buy an expensive adapter in a company store, very often you will get not 1A, but 0.5A at the output. And that’s half the problem (it’s just that your phone/tablet will take 2-4 times longer to charge). It is much worse if in fact it produces a much higher current and does not smooth out significant voltage surges - this can already greatly reduce the battery life of your gadget, and sometimes even lead to its failure.

The problem is that if you don't have a USB tester, you have no way of knowing whether your charge is normal or not. The phone is charging - everything seems to be in order. This is exactly what unscrupulous manufacturers and sellers are counting on (the same can be said about cables - even if charging produces 1A, a poor quality cable can lose up to 80% of the current, and you, again, will have no way of knowing about this without a tester).

This is why we almost always recommend that our clients order a USB tester right away. This purchase will pay for itself more than once! Here you will find various : more expensive and cheaper, more and less informative. But no matter which one you choose, it will be one of the most useful and smartest purchases you make!

Speaking of network chargers:

For a long time we did not sell them at all precisely because of this: we could not find a reliable supplier who had good and (which is very important) constant quality. However, customers kept asking, and we never stopped looking. After many test purchases we managed to find it. Now you will find many high-quality original chargers . Among them -

8. Do not allow the PowerBank to overheat - both during charging and from external factors (heating battery, direct Sun rays and so on.)

If you do not neglect these tips, your Powerbank (as well as any other device) will serve you long and well.

These Power Banks are quite a convenient thing - they can be used for their intended purpose, charging smartphones and Cell phones if there is no outlet nearby. Or you can take 5 volts from them and power various flashlights, devices and gadgets, check the operation of any pocket equipment. The Power Bank consists of several lithium batteries combined into one battery, a charge unit, a 3.7-5 V inverter on the TD8208 and a controller that manages all this equipment, at the same time showing the charge status with LEDs.

In general, this device was bought from the Chinese a couple of years ago, I used it for some time, and then it remained in the garage for a whole year, after which it stopped turning on. We'll have to fix it.

It is possible (albeit difficult) to open the plastic box with an ordinary knife, one by one unclicking the latches at the ends of the case. This must be done very carefully so that pieces of plastic do not break off, otherwise the presentation will be lost and the joy of the Power Bank owner will be somewhat darkened.

Opening the case we see several Li-Ion batteries, size 18650 (like in a laptop battery). Each can, according to the manufacturer’s idea, should provide 4000 mAh. This means the total will be 6x3500=20000 mA. But this is natural in theory. In practice, you will be very lucky if you have half the declared capacity, but it is often even weaker...

This depends on the price of the Power Bank and the brand name of the manufacturer. It is naive to assume that a 50-amp device bought cheaply on Ali Express will correspond to the sticker. When buying, it is better to choose a middle ground. For example, this copy does not have not only the company name, but also no stickers on the batteries. But we digress - let's get back to the repairs.

Pressing the button (the only one on the device) for 2 seconds starts the device, as evidenced by the lit LED (or several - depending on the degree of discharge). 5 volts will appear at the USB output jacks. But this doesn't happen. Why? We'll figure out...

First of all, we measure the voltage on the banks themselves. They are all paralleled here, which is not very good, since it will be technically difficult to find the problem one - everything is welded and it will not be possible to unsolder it. Secondly, with this mode of operation, there may be a skew in the charging current and voltage of the elements, and this also has a bad effect on durability. And if one of the cells shorts inside, everyone will suffer.

Fortunately this did not happen, however the voltage is only 1.1 volts. This is clearly not enough to start a Power Bank, since I know from experience that a minimum of 3 V is needed. The circuit “does not see” a battery with such a low voltage and cannot start charging it. You will have to do this manually by pumping it from a regular regulated power supply, setting the current to 1 A and keeping them on charge for 10 minutes, to at least a level of 3 volts.

But now things have started! The Power Bank started up and one blue LED lit up, indicating that the charge was only 25%. The rest will be 50, 75 and 100%, respectively. Now we put it on the adapter (or connect it to Computer USB) and bring the charge up to maximum (about 8 hours). It takes a long time because the charging current is limited by the circuit to 0.5 A.

After successful repair, do not rush to close the case. Let the Power Bank remain open until the end of the day to measure the rate of voltage drop on the battery. Perhaps there is a rapid self-discharge. In my case, in half a day the voltage dropped from 3.76 to 3.74 volts - in principle, this can be attributed to the error of the multimeter itself. If the drop was 0.1 V or higher, this may indicate a problem bank that needs to be found and neutralized, otherwise your Power Bank, after lying for a couple of weeks, will fail again.

That's all the work. As you can see, in simple cases, you can repair this thing yourself, unless, of course, the breakdown affects the electronic part. Then it will be easier to replace the entire module using the instructions.

Greetings to all readers of my blog! We continue to disassemble portable batteries. The cost of a good Power bank is significant enough to put up with quick loss performance. To extend the life of your device, you need to know how to charge a power bank correctly. We will talk about this today, and also analyze the situation when the Power bank does not charge: what to do, how to identify the cause and try to eliminate it yourself.

Charging the power bank correctly

To begin with, the new power bank needs to be “pumped”. First of all, we charge the battery to 100% (according to the rule, you should receive a portable device with 70 - 80% charge). It is not possible to pre-discharge new modern batteries, as was previously recommended. Next, be sure to carry out 2 - 3 cycles of complete discharge and charging to 100%. Such manipulations will allow you to “boost” the maximum possible battery capacity.

The next important recommendation on how to properly charge a power bank is to always “fill” the “energy storage” 100% and not immediately disconnect it from the network for “trickle” charging. It is carried out at low current strength, after the 100% indicator on the case lights up. The beginning and end of this process can be monitored using a USB tester. When a value of 0.1 - 0.05 A appears on its display instead of 1 - 1.5 A, then “drip” charging has begun. The battery will be charged to maximum if you wait until it resets.

You should not allow your portable battery to constantly discharge completely. It must be connected to the power supply when the critical threshold of 20% is reached. In this case, there are two ways to charge the device: from a stationary 220 V electrical outlet via an AC adapter and from a computer via a USB cable. The first method is the fastest and most preferable. At the same time, there is the concept of battery calibration, which implies its complete discharge. To prevent various malfunctions, such calibration should be carried out once every 3 months.

The battery charge level is displayed on an LED indicator (the more lights are on, the higher the charge) or on the display (shows the exact percentage). It is recommended to always allow the power bank to “feed” completely. Short-term recharging is harmful to a lithium-ion battery, despite manufacturers' assurances that there is no memory effect. It’s unfortunate, but such an effect exists, and such irresponsible handling of the device will lead to the inability to charge it 100% in the future.

Another frequently asked question buyers - how long does it take to charge an external battery? There is no universal answer for all models, since the time depends on the energy intensity, the presence of an additional fast charging function, and the current strength in the network (more precisely, on the value that your adapter produces). If we talk about 5 or 10 thousand units for smartphones, then they require an average of 12 hours of recharge. High-quality models with a capacity of 20,000 mAh for laptops are equipped with a fast charging function and, surprisingly, require only 3 - 4 hours. You will, of course, find more detailed and accurate information regarding the purchased device in the user manual or operating instructions.

What to do if the portable battery does not charge?

When we connect the power bank to the source electric current, the indicator immediately lights up and flashes until the process is completed. At the same time, there is no need to constantly wake up at night in order to promptly disconnect the charging gadget from the network. Most models have overcharge protection and automatically turn off when the battery is completely full.

But what to do if the real situation does not develop according to the manufacturer’s scenario? Why did an external battery that had been in service for months suddenly stop charging? The most common reason, according to service center specialists, there is a break in the wiring in the port socket. As a result, you insert the cable into the connector, but no current flows. There is one way to fix such a malfunction - solder the contacts.

If the device (especially one ordered via the Internet) does not even turn on upon first inspection, then most likely it is completely discharged, so you first need to charge it.

Many users encounter this problem when the power bank takes too long to charge (for example, 10 hours with a capacity of less than 5 mAh).

You need to look for the problem in the following:

• low-quality network adapter that produces low current output (less than 1 A);
• thin cable that loses a large percentage of current;
• controller malfunction;
• the contacts in the connector move away (current flows in and then stops flowing);
• poor-quality assembly (when it’s easier to throw it away and not suffer).

You can try to eliminate some causes yourself (take another adapter with a good cable, disassemble and solder broken contacts), but without certain basic knowledge it is better to contact a specialist.

Very often, a cheap power bank from a dubious manufacturer not only charges slowly, but also discharges disproportionately quickly. There can be two options here: either the battery capacity is outrageously lower than declared (and instead of the expected 12,000 you actually have about 6,000 mAh), or one or more parallel-connected batteries inside the case turned out to be poorly sealed and simply came off (as a result there is a noticeable loss of capacity).

Power bank should provide our comfort and mobility (this is its essence), but for this we must take care of it and not forget about the rules of operation: store long time with a charge level of about 50 - 80%, do not allow prolonged hypothermia, do not leave in a room with high humidity. Before you begin troubleshooting any problems, you should evaluate all the risks (especially when working with Chinese counterfeits). I hope I helped you understand the issues of charging a power bank in order to avoid its premature failure. Subscribe to blog updates - share interesting information with friends in in social networks and get to know the technology around us better.

What to do if the power bank does not charge your phone?

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Thank you for your attention! See you again on my blog. Sincerely, Rostislav Kuzmin.