Micro USB connectors. Types of USB connectors, their features. USB: types of connectors and cables for a smartphone

Phones usually run out of charge at the most inopportune moment, when there is catastrophically little time to charge. We turn on the first charger we come across with a wire and wait... Sometimes the charge occurs quickly, and sometimes it takes a treacherously long time, and after a while we are again left without communication.

Let's look at the process of charging a phone and all its components. And we’ll try to give recommendations that will help you choose the right chargers and always stay connected.

Modern communication devices are charged from 5 Volts, this is the voltage that is present at the output of the USB connector of a computer, router, TV, and so on. Chargers that are plugged into a socket are usually equipped with this connector. But in addition to voltage, an important parameter is the current with which the charge occurs.

If we talk about a computer, then the standard maximum current value for USB 2.0 is 0.5 A (amps), which is not very much for modern devices. If the charging device requires a higher current (1-2 A), then charging will take a painfully long time and may never be completed.

Another USB 3.0 standard (the connector is indicated by blue plastic inside) provides a current of up to 1 A, which is much better, but such connectors are only available on modern computers (TVs, routers and other devices are usually equipped with a USB 2.0 standard connector or even a USB 1.1 standard). That is, if we need to charge the phone from a computer, we should, if possible, choose the blue USB 3.0 connector; the device will charge much faster.

It is no coincidence that universal chargers have different prices; in most cases they differ in the maximum possible charging current - the higher the price, the higher the current, as a rule, and, accordingly, the potentially shorter charging time of the device (in this case, we do not take into account the markup for the brand and design) .

Of course, it is important to know the capabilities of your device in order to choose a charger with the required parameters. As a rule, most manufacturers indicate a maximum current of 1 A. But not all actually provide it. To compare different chargers, we will use a tester that shows current and voltage, as well as simulating a consumer with different current consumption.

Ideally, the charger should output 5 Volts and the maximum current that the device being charged can consume. But in reality the picture is different. To eliminate the influence of the cable connecting the charger and the phone, we will connect the tester directly to the charger.

Test 1 (5 Volts and 1 A stated):

We see that the voltage is 120 mV lower than declared and the current is 70 mA less.

Test 2 (5 Volts and 1 A stated):

We see that the voltage is slightly higher than declared and the current differs from the declared one by only 40 mA.

Test 3 (5 Volts and 1 A stated):

We see that the voltage is slightly higher than declared and the current corresponds to the declared one.

Test 4 (stated 5 Volts and 0.7 A):

The voltage and current are significantly lower than the previous ones; you should not expect fast charging from this device.

Test 5 (stated 5 Volts and 1 A):

Voltage and current correspond to the declared ones.

Test 6 (parameters not indicated):

The voltage and current are lower than the previous ones, you should not expect fast charging from this device.

Test 6 (charger combined with a block of sockets, stated 5 Volts and 2.4 A):

Very decent parameters.

Test 7 (charger combined with a tee of sockets, stated 5 Volts and 1 A):

Very good results.

As you can see, not all manufacturers were able to provide the declared characteristics, and in those cases where the voltage is lower than required and the current is lower, we will naturally get a longer charging time for the phone or tablet.

The second important element in the charging process is the cable connecting the charger to the phone. There are many options for such cables, some even with backlight. However, their main parameters are the material of the current-carrying conductors (preferably copper) and the thickness of the conductor (the thicker, the less the cable will affect the charging process). Let's test several cables.

Test 0 (tester connected directly to charger):

Test 1 (cable included with Sony Xperia Z3):

A good cable for a current of 1 A, at 2 A there is an overload and loss of parameters.

Test 2 (cable purchased separately):

Good cable for 1 A, loss of parameters at 2 A.

Test 3 (cable purchased separately):

Bad cable, charging will be very slow.

Test 4 (cable purchased separately):

The leader in fast charging, according to phonearena.com, is the Samsung Galaxy S6 (1 hour 18 minutes with a battery capacity of 2,550 mAh). In second place is Oppo Find 7a (1 hour 22 minutes with a battery capacity of 2800 mAh), in third place is Samsung Galaxy Note 4 (1 hour 35 minutes with a battery capacity of 3220 mAh),

In fourth place is Google Nexus 6 (1 hour 38 minutes with a battery capacity of 3,220 mAh), in fifth place is HTC One M9 (1 hour 46 minutes with a battery capacity of 2,840 mAh). Fast charging technology is also supported by: LG G3, OnePlus One, Samsung Galaxy S5, LG G4, Samsung Galaxy Note 3, Apple iPhone 6, Motorola Moto G, Sony Xperia Z3 and a number of others.

So, if charging speed is important, you should choose phones that support QuickCharge technology.

Naturally, fast charging speeds are only possible when using high-quality chargers and cables that support the required currents and voltages. Of course, it is better to use the charger that comes with your phone. But if it is purchased separately, then when choosing, you should take into account the above described parameters.

An additional charging cable is far from the most necessary accessory in the house. Many phone owners have been using the included cable for years and everyone is happy. But if the cable gets frayed, gets lost, bursts, or just needs a backup, you run to the nearest communication store or to a thematic website and... You discover dozens and hundreds of models and manufacturers. How to make the right choice in this case?

We present a complete guide to choosing a smartphone charging cable.

The first problem that buyers think about is often the choice between an original and a non-original cable. On the one hand, the well-known logo seems to be a guarantee of the reliability and long service life of the accessory. On the other hand, not everyone wants to overpay for a well-promoted name. If you have your own reasons not to buy an original cable, but to choose a suitable product from a third-party manufacturer, read below what criteria you should pay attention to before purchasing.

For Android smartphones

Thanks to standardization, most modern phones have one of two connector types, microUSB or Type-C. The latter is less common, as it began to gain popularity relatively recently.

The USB Type-C connector has a symmetrical shape, and when choosing a cable for it, you should take into account a very important nuance: which interface the smartphone works with, USB 2.0 or USB 3.0/3.1. Often Type-C is only a form, and there will be no advantages in the form of high data transfer speeds or increased maximum current, because inside it is still the same USB 2.0 with a bandwidth of 480 Mbps. Therefore, there will be no point in buying an expensive USB 3.0 Type-C cable.

In addition to this nuance, cables with a Type-C and microUSB connector are selected according to the same criteria.

• Plug and build quality

Try to look at the cable as best you can before making a purchase. If you buy an accessory on the Internet, give preference to sites with high-quality, high-resolution photographs that can be enlarged. The cable should not have any creases, protruding plastic, or crooked contacts of different sizes. The plug should not dangle or look flimsy.

It is worth paying attention to the connection of the cable and plug. This is a very vulnerable place for breaks, so you need to give preference to models with dense, rigid plastic corrugation at the plug.

• Shape and length

The three most common cable shapes are flat ("noodle"), round and twisted ("spring"). Each type has its pros and cons. Flat cables are less tangled and more compact, but if the cable is of poor quality and too thin, it will quickly break. Round cables last a long time, but you should choose flexible models rather than rigid ones, because... they are more convenient for everyday use. Twisted cables are a good choice for a car, as they will not get tangled underfoot and can even reach the rear passenger seat if necessary. But if the twisted cable gets tangled, you will have to spend a lot of time putting it in order.

The optimal cable length is determined only by the user, but most often cables for smartphones are one meter long or a little more than a meter long. And if necessary, then any decent mobile accessories store will stock short USB cables and accessories with a length of 1.8 meters or more.

• Braid

• Maximum current

Unless you go shopping with a portable USB tester, you won't be able to accurately determine whether the cable delivers the stated amperage or whether the manufacturer is deceiving you. But to protect yourself from unscrupulous sellers, consider the type and price of the device. Since there are no miracles in the world, a cable for 50 rubles will still not be able to charge a powerful smartphone or tablet, and a USB cable as thin as a thread will not provide a current transmission of 2.4 A. This contradicts the laws of physics and logic.

But remember that you can buy defective goods either from an unknown Chinese seller or from the company store of an influential mega-corporation. Therefore, choose products in stores that provide a quality guarantee and clearly describe the return procedure.

• Additional features

If you are buying a cable not only to charge a smartphone, but also to connect a mobile device to a computer, choose models whose descriptions indicate the ability to transfer files and compatibility with specific operating systems.

Some cables are equipped with an LED operation indicator, which not only looks beautiful, but also informs the owner about the functionality of the gadget.

If your smartphone requires charging constantly, then connecting the cable every day will sooner or later loosen the power connector. To avoid having to spend money on repairing your smartphone, buy a magnetic cable with a detachable plug. The contact pad of this cable is installed into the phone connector and cannot be removed, and when you need to charge the device, simply bring the rest of the cable to the already installed plug. And the charge goes on, and the smartphone is protected from dust and dirt inside.

For iPhone

Cables for iPhones can be considered before purchasing in the same way as cables with a microUSB connector. However, if you want to choose a proven cable for your “apple”, but buying the original is expensive, but you don’t want an analogue one, there is a way out - look for the three treasured letters on the package.

Abbreviation MFi.

MFi stands for Made For iPhone/iPad/iPod. These accessories are designed for use with Apple products and, most importantly, have been certified by Apple as being of good quality analog accessories. The iPhone will not swear on them and a connection error message will definitely not appear on the smartphone screen. In the Partner online store you can buy MFi cables, and also check the authenticity of the certification on the official website https://mfi.apple.com/MFiWeb/getAPS if you enter the Partner name in the search using the Brand criterion.

Enjoy the shopping!

How is a USB cable different from other cables? The main parameters when choosing a USB cable are standards, markings and size.

Today, almost all multimedia devices are equipped with a USB connector. Sometimes the connection occurs through an extension cord, and not directly to the port.

You need to choose the USB cable correctly. Firstly, each cable has its own marking. For example, HIGH-SPEED 2.and 028AWG/2C+28AWG/2C.

So, if you need a cable that supports the USB 2.0 standard. or 3.0., then the inscription should read “USB High speed cable 2.0”. USB 2.0 standard. does not support cable marked 1.1.

A standard high-speed USB 2.0 cable consists of one 28 AWG twisted pair to carry data and a pair of conductors to carry power from 20 AWG to 28AWG. In addition, the USB cable must be shielded.

When transmitting a signal using USB, it is important that it does not fade. Therefore, when choosing a suitable USB cable, you need to determine the required size.

For example, the marking "28 AWG/1P.....", the first numbers mean the maximum length of the USB cable - 28 AWG = 81 centimeters. If 26 AWG, then the cable length is up to 1 meter 31 cm. With markings 24 AWG, 22 AWG, 20 AWG, the cable length can be up to 2.08 meters, 3.33 meters and 5.00 meters, respectively.

Therefore, if the length of a USB extension cable is 5 meters, but there are two pairs of 28 AWG wires inside it, then it does not comply with the standards. At this length it should be 20 AWG.

Another cable with a length of 1.8 and marked 24 AWG (which implies a maximum length of up to 2 meters) complies with the standard. That is, the actual length of the cord should not exceed the maximum permissible data indicated on the cable.

The marking also contains other data: a note that the cable is shielded - Shield; wires twisted into a pair - P (Pair); two conductors - 2C.

At the end of the USB cable there is a small thickening, a ferrite ring. It works as a filter against RF interference and is present in all high-quality USB cables. On some extension cords it is located at both ends.

If the USB cable is incorrectly selected, the speed of data transfer may be significantly reduced. Also, the system may not recognize a device connected via USB or simply stop seeing it at any time.

The longer the cable, starting from 3 meters, the more problems may arise. To ensure stable operation of a USB device, you need to choose a USB cable that is as short and thick as possible. Then, when transmitting data, there will be less resistance and less signal attenuation.

Combining all that has been written, we can conclude:

• to choose a high-quality USB cable, you need to check the maximum length and AWG value;
• the inscription on the cable should read HIGH-SPEED 2.0;
• at least one end of the extension cord must have a ferrite barrel;
• The cable length should be as short as possible.

Around the mid-1990s, an interface called Universal Serial Bus (USB for short) was invented. Ports of this format immediately gained popularity. They began to be equipped with personal computers, and later with laptops. But over time, it became clear that standard USB sockets are not ideal. In particular, they could not be transferred to compact devices. More precisely, the transfer process itself is possible, but this would have a detrimental effect on the dimensions of the device. Thus, manufacturers have taken a course towards minimizing this interface. As a result, mini USB sockets and then micro USB sockets appeared, as well as corresponding cords for them. In this review we will talk about cables of the latest format, because the ports for which they are intended are now equipped with almost any type of equipment - from watches to televisions. So let's get started.

What are micro USB cords?

An accessory of this type is a cord with four conductors inside:

• one pair is intended for transmitting digital information;
• the second pair is needed to transmit power with an optimal voltage of up to 5 V inclusive and a current of about 900 mA.

One end of these cords is equipped with a micro USB plug, which is inserted into the corresponding port on the device. The other end is a standard USB plug, which usually plugs into a PC or wall charger.

As a rule, conductors are made of good copper. The resistance directly depends on the quality of the metal used: the better the material, the lower the resistance and vice versa. To be clear, low resistance provides optimal voltage and recharges the battery faster.

The wire cross-section is often 2 mm. Sometimes the conductors have a slightly larger diameter. But excessive minimization of the conductor size is also undesirable. Firstly, a wire that is too narrow will lead to a loss of voltage during charging, and secondly, the shelf life of such a conductor is extremely short.

Rubber is most often used as a braiding material. Conscientious manufacturers who focus on the durability of their products use soft plastic. The most beautiful version is considered to be rubber insulation covered with fabric (such cords look like ropes). In most cases, accessories with this design contain high-quality conductors, and the fabric shell reliably protects them from physical damage.

Types of micro USB cords

Cables of the format in question may differ in shape, length, and braid color. But the main difference concerns the structure of their plug. There are two independent options on the market:

1. Micro-USB Type-A- have a flat rectangular plug. Its dimensions are 7x2 mm. You can only plug such a cord into a socket of the appropriate format.
2. Micro-USB Type-B- these cords have an even thinner plug. The height of the contact itself is 1.8 mm. The sides of these plugs are beveled and slightly rounded. This design makes incorrect placement inside the port impossible. In addition, a Type B cable cannot be inserted into a connector designed for Type A cables.

It would seem that there are only two types, but even among them you can get confused and accidentally buy the wrong thing. Therefore, manufacturers have released universal options on the market - hybrids, in which both types of plugs are located side by side horizontally. Also, almost all modern devices are equipped with universal micro USB Type-AB sockets. They are double, so that you can insert a type A and B plug into them. Moreover, the design of the socket will not allow you to insert the contact incorrectly.

The best brands of micro USB cords: TOP 8

Now we will look at the seven best micro USB cables. Perhaps you will give preference to one of these brands in the future. So, which micro USB cable is best?

1. Monoprice Premium. This is the most inexpensive participant in this TOP. It has gold-plated USB and micro USB plugs. The connector heads are made of glossy polycarbonate. This material was not chosen by chance, because it made the heads rigid and compact. The braid can be black or white. The minimum length of such a cord is 91 cm, and the maximum is 183 cm. The cable allows for fast charging of the device and high-speed data transfer from the PC to the gadget and back.
2. Scosche FlatOut LED Micro- quite a worthy representative of our TOP. Manufacturers have tried hard to make this product as practical and convenient as possible. One of the highlights of the described cord is the LED indicator located near the micro USB plug. It emits red light when the device is charging. When the energy replenishment ends, the color turns blue. Thus, the owner will not overexpose his gadget to charging. Another feature of the described cord model is the unique design of the plug. It can be plugged into the phone in any position, which also adds convenience. The disadvantage of the Scosche FlatOut LED Micro is that after prolonged use the USB plug begins to stay in the socket less well. However, such a flaw becomes noticeable after a couple of years of active use. By the way, the shape of the cord is flat. And although cables of this kind are usually not famous for their high strength, this model can be safely classified as a pleasant exception. The cord supports fast charging and high-speed digital data transfer. The cable length can be 91–183 cm.
3. TYLT Flyp Duo- another high quality flat cable. At one end of this model there is a standard USB plug, and at the other there is a micro USB plug and an adapter to Lightning. Thus, this cable is an excellent solution for families that use both Android devices and Apple gadgets. The cord supports fast charging. Data is also transferred at a decent speed. The model has an elastic braid. There are models on the market with different color options, including classic black. The cable length can be from 30 to 100 cm.
4. Anker PowerLine- This is an inexpensive but very high quality product. It has long strands reinforced with Kevlar fibers. Stress points are reinforced, which guarantees solid durability. This cable is characterized by fast synchronization. It supports high-speed charging of mobile devices. The length of the cord is quite large - 3 or 6 meters. Thus, the model in question can become a real savior for people in whose homes free sockets are located far from the place where the gadget is located. The cord comes with a pair of Velcro strips that allow you to secure it for storage or transport.
5. Volutz Equilibrium- a model with as many as 4 length options: 91, 100, 200 or 300 cm. The braid is made of hard nylon, which protects the wires from excess load and prevents the wire from getting tangled. The shell of both plugs has a convenient shape, thanks to which they can be pulled out of the connector with one thumb. The cable supports fast charging and high-speed data transfer. Perhaps the only disadvantage of the cord is its bulkiness, but during operation it is practically not felt.
6. Fuse Chicken Titan- This is probably the toughest micro USB cable. Its braid is made of industrial steel, so cats are definitely not afraid of this cord. The standard length is 1 m. Using this cable, you can quickly charge mobile gadgets and transfer files to them. The main disadvantage of Fuse Chicken Titan is its own advantage - steel braiding. It makes the accessory quite heavy, so it is not suitable for everyday wear. In addition, the cable does not bend well, so you will have to carefully consider the location of the charging device relative to the power source.
7. MicFlip 2.0- another representative of our TOP, capable of fast charging and transfer of digital information. It has gold plated plugs. The fork shell is made of aluminum for added strength. Standard cable length is 183 cm.
8. Floveme micro USB magnetic cable. It is no coincidence that this model made it into our TOP. The magnetic cable in question is the best of its kind. Its length is 1 m. The diameter of the cord is 3 mm, which is considered the optimal value. The general design of the model is similar to all previous cases, but there is one interesting point: the micro USB plug can be left in the device, separating it from the magnetic part of the wire. This connection method is designed to minimize damage to the port that occurs when a plug is inserted into a socket multiple times. The model has a very nice design. This magnetic cable will ensure fast charging of your mobile device and high-speed transfer of files to it and back.

What to look for when buying a micro USB cable?

We mentioned above that the speed of charging the battery on the gadget directly depends on the quality of the conductors. What caused such dependence? Let's try to figure it out.

Almost all modern devices are equipped with lithium-ion batteries, and they replenish energy reserves using a complex algorithm:

1. Initially, a fixed current is supplied, and the voltage gradually increases.
2. Then the voltage is fixed at the maximum level for the battery, after which the current is gradually reduced.

The process of replenishing the energy reserve is controlled by the built-in charge controller. At the very beginning, he tests the quality of the current source so as not to overload it. The test is carried out in a simple way - a load is applied and the voltage indicator is recorded. Even with a high-quality source, the voltage will subside, but not much. When charging the gadget, the cables themselves play the role of source, so the controller will test them. On cheap cord models, the voltage is initially underestimated, which is why the device will take less current than 1A. For example, this figure can be 0.7 or even 0.5 A. It’s easy to guess that with such a current, charging will take a lot of time.

In order not to purchase a low-quality micro USB cable model, it is recommended to check their voltage yourself in the store. To do this, you need to take special equipment with you. The optimal voltage for the cord is 4.5 V (or higher) with a current of 0.8 A.

It is clear that only men with experience in working with electronics will be able to carry out such checks. As for ordinary people, there are clearer guidelines for them:

1. Price. In the case of micro USB cords, the inscription on the price tag largely determines the quality of a particular model. There is no need to take the most expensive accessories, but only cables that have an average cost should be considered as potential purchase options.
2. Manufacturer- the second most important point. It is better to take models from popular brands for which their reputation is important. Although here again it is worth considering the price. For example, a cheap analogue from Samsung may turn out to be much worse than the so-called noname option with an average price.
3. Form. It is recommended to give preference to round cables as they have good strength. As for flat options, we reviewed the best cords with this shape above. The rest of the models will look beautiful, but they won’t last long.
4. Braid. The logic here is simple - the denser the better. Micro USB cords often become bent when carried and can be mistaken for a toy by a cat. In addition, the cable can be accidentally caught with your foot or hand while charging the gadget. In these cases, only a dense braid will save the cores from breaking.

It is highly desirable to clarify the material of the conductors, but you are unlikely to receive useful information: the seller either will not have such information, or will tell a lie in order to sell the product.

Cost of micro USB cables

The price of such accessories can vary greatly. Models are sold on the market even for 35 rubles. In general, the cost of micro USB cords can be divided into 3 categories:

1. 35–100 rubles- options that you don’t even need to pay attention to. These cables break down quickly, and charging speeds can reach 10-12 hours.
2. 100–300 rubles- this is the price they are already asking for more or less decent models. Overall, this is the best option for most consumers. Cords priced in this range have good performance characteristics and last quite a long time.
3. Above 300 rubles- for that kind of money you can buy one of the representatives of the above-mentioned TOP. Prices will range from $6 to $30. Of course, this is a considerable price to pay for the charging cord, but you definitely won’t have to worry about quality and durability.

We have now completed our review of the best micro USB cables. As you can see, choosing a suitable cord is not difficult. The main thing is to focus on obvious criteria and not save too much on price. Fortunately, there are many more high-quality cables on the market than bad ones, so the likelihood of a successful purchase is quite high. More interesting information about micro USB cables from different manufacturers in the following video:

We present a selection that will interest almost every smartphone owner - 5 reliable USB cables for fast charging devices.

Choose the appropriate cable model for your phone and order it on AliExpress with free delivery throughout Russia.

The products presented in the selection are only from trusted sellers with excellent service.

Happy shopping!

Looking for a charger for your iPhone? The MCDODO Lightning USB cable will definitely come in handy If, of course, you have an iPhone 5, 6, 7, 7 Plus and 8. This is a smart accessory with auto-shutdown and fast charging functions.

The cable length is 120 cm and 180 cm. The seller offers it in 4 unusual colors, for example Tiffany color.

By the way, the MCDODO cable is also compatible with iPad Air, air2, air 3, Air 4 and Mini 2. It is designed for 15,000 charging times.

Another useful feature is the LED indicator. Thanks to the improved quality of the materials from which the charger is made, the life of the product increases. Reviews about the product are good.

In general, every iPhone owner needs such a cool MCDODO cable with auto-shutdown.

Customer reviews:

• The cable is great! Stiff and doesn't bend much. Delivery 15 days to Moscow region. I’ll add more later, depending on how long it lasts.
• The track is tracked, delivery is about a month, the cord is of high quality, only a little hard (according to the comments they say that it will become softer over time), it copes with its functions, about half an hour after a full charge it turns off the power supply (that’s why I bought it) . I'm satisfied 5+

Seller's reliability: excellent!

Delivery within Russia: free!

Need a charger for Samsung, HTC, Xiaomi, Sony? The VEnTIOn micro USB cable will come in handy If, of course, you have Samsung, HTC, Xiaomi, Sony.

This is a smart accessory with auto shut-off and fast charging functions.

Cable length - 1, 1.5, 2, 3 m or 50 cm. The seller offers it in 3 colorful colors.

By the way, the Micro USB 2.0 cable is compatible with Android.

The cable is made of quite high quality. Reviews about the product are good. It will last a long time, and it charges your smartphone quickly.

In general, every owner of Samsung, HTC, Xiaomi, Sony needs a VEnTIOn Micro USB cable.

Order it for yourself on Aliexpress with free delivery throughout Russia.

Customer reviews:

• Everything arrived perfectly, as in the description. Charges great. I conducted an experiment: my meter-long 1-amp wire charged 10% in 16 minutes, and this 1.5 (!) meter wire charged 16% in 16 minutes. The quality is great too. The connector can be reached through the millimeter case normally.
• I constantly order from this seller, another order and everything is great.

Seller's reliability: excellent!

Delivery within Russia: free!

Micro USB Type-C cable from Pzoz is a new product among fast charging devices for smartphones; it is magnetic. Magnetic data cable. Compatible with iPhone 7 and 6S, HTC, Panasonic, Samsung, Sony, LG.

A smart gadget with auto-shutdown and fast charging functions.

The cable length is 1, 2 m and 3 m. The seller offers it in 6 unusual colors.

Another useful feature is an LED indicator indicating the charging time of the smartphone. Thanks to the improved quality of the materials from which the charger is made, the life of the product increases. Reviews about the product are good.

By the way, the magnetic plug for the cable holds the weight of the phone quite firmly if you hold it by the wire.

In general, every iPhone owner needs such a cool MicroUSB Type-C cable with auto-disconnection.

Order it for yourself on Aliexpress with free delivery throughout Russia.

Customer reviews:

• Great cable! Flexible, soft. The magnet is strong and can withstand the weight of the phone without jerking. A very convenient thing, I recommend it! Delivery 35 days, fully tracked.
• The usb input and output were smaller than I expected! The quality is normal, the compactness was a pleasant surprise! Akum 4100 charges without loss of time! Good quality for the price!! Time will tell the rest!

Buy on AliExpress.