Are wireless chargers slower than wired chargers?

8 min read

 

Charging speed and cable length were among the criteria that manufacturers of wired chargers for phones, whether Lightning, USB-C, or Micro-USB, to meet the needs of users who naturally do not want to wait for long periods before their phone batteries are fully charged They also like that the cords of phone chargers come with appropriate lengths that allow them to use the phone during the charging process when needed without having to stay very close to the power socket, and indeed chargers now come in large lengths starting from one meter and up to 10 feet (that is, more than 3 meters). ).

 

It is true that the length of the charger cord is not an advantage in all cases, but it allows comfortable use of devices while recharging their batteries, but it takes longer to recharge these batteries, and then achieving this requirement interferes with achieving the other requirement of fast charging batteries.

 

Are wireless chargers slower than wired chargers

In recent years, the need for smartphone users to use chargers with long wires has decreased with the advent of wireless chargers that have solved the problem of staying close to the power socket. Some companies producing smartphones have for some time refused to offer such chargers for their phones, citing the fact that it is an impractical type of phone charger, such as Apple, which eventually acquiesced and released 2017 the iPhone X and 8 Plus as the first versions of its phones that can Recharge its battery through a wireless charger. But does the use of this type of charger in turn affect the speed of the charging process? In other words, is the process of recharging the phone battery through wired chargers as quickly as recharging it through wireless chargers? Let us answer this question in the following lines.

 

How does the phone battery recharge?

 

Most smartphones today use rechargeable lithium-ion batteries, which provide a number of great advantages to their users such as small size, large capacity, and the ability to obtain from them very high voltages of up to 3.6 volts, in addition to their high efficiency and long life, as their relatively long They do not suffer from memory effect and have a low self-discharge rate compared to some other types of batteries. In order to be able to recharge any battery in the traditional wired way, it is necessary to have a source of alternating current, such as an electrical socket, and a charger that matches the type of that battery, and we also need to have an appropriate entrance through which we can connect the battery to the charger.

 

How does the phone battery recharge


As soon as the phone is connected to the power source through the charger, the charging process begins, and the electricity flows into the battery and reverses the chemical reactions that occurred inside the battery during its use and discharge of energy. In the case of a lithium-ion battery, the battery discharges its energy during use through the transfer of lithium ions from the negative terminal of the battery to the positive terminal of the battery, and thus; To recharge the battery, the lithium ions must be re-accumulated at the negative terminal of the battery. Good chargers usually pass a small amount of current into the battery, between 3-5% of the maximum current value that the battery can handle, keeping it safe for as long as possible.

 

Wired chargers consist of a step-down electrical transformer and a cable that contains a number of wires of equal cross-sectional area, which are mostly made of copper materials. The charger transformer works according to what is known as Faraday's law of electromagnetic induction, which describes the effect of mutual induction between two coils.

 

When the two ends of the primary winding of the transformer are connected to an alternating current source, the passage of a changing current inside the coil is accompanied by a changing electromagnetic field. The secondary winding is such that the induced current is proportional to the original current passing through the primary winding of the transformer. This current exits at the end of the charger adapter through the cable to charge the battery.

 

How does the phone battery recharge

The idea of ​​wireless chargers working is not much different from their wired counterparts except that they use air as an alternative to the copper wire charger cable to wirelessly transmit electricity to devices through two additional coils, one of which acts as an antenna, which is the transmitting coil located in the charging plate on which the phone is installed. This coil, by inductive resonance coupling, sends an electromagnetic field to be received by another smaller coil located inside the phone at the resonance frequency, and then the circuit of this smaller coil converts the electromagnetic field that it picked up into an induced electric current that works to charge the battery.

 

Ways to speed up the charging of the phone battery through wired chargers

 

Manufacturers of phone battery chargers have been keen to develop fast charging technologies so that they take as short a time as possible to perform their work in fully charging the batteries, which increases the desire of users to buy the product, either by increasing the current entering the battery or increasing the effort, both of which work on Increase the amount of electrical energy stored by the battery. Most fast charging technologies today involve increasing the value of the voltage rather than increasing the value of the current.

 

Ways to speed up the charging of the phone battery through wired chargers

There are many other ways that can help smartphone users charge their phones using wired chargers as quickly as possible, including replacing the normal chargers that come with phone accessories when buying with newer versions of chargers compatible with the device; For example, the basic iPhone 8 charger with a 5-watt charging capacity can be replaced with the 20W USB-C charger provided by Apple, which is also compatible with the phone model. To two and a half times or three times the speed of charging it using the original charger that comes with the device accessories.

 

Is the speed of wireless chargers different from wired chargers?

 

The charging speed of batteries for phones and other devices depends on many factors; Such as the type of device or type of phone, the type of battery used, the capacity of this battery, the power of the charger adapter, in addition to some other factors such as the quality of the charger cable, the thickness of the wires inside the cable in the case of wired chargers, or the distance that separates the transmission coil in the charging plate from a coil The reception in the phone for wireless chargers, the farther the distance between the transmitting coil and the phone, the electromagnetic field lines find it difficult to reach the receiving coil and the charging process is slower, and therefore the wireless phone charging speed reaches its maximum limits when the phone’s receiving coil is placed next to the transmission coil on the panel Shipping.

 

Of course, it is possible to overcome this obstacle by designing larger transmission coils, but this method remains limited by design limitations, as using a larger transmitting coil in the charging pad will need to place a larger receiving coil in the phone as well, which is not desirable in the design of phones and leads to Increase the final size of the phone.

 

In general, the speed of charging smartphone batteries through wireless chargers is much slower compared to conventional wired chargers, as it can reach almost half of its speed. It took the iPhone XR battery, for example, to power to 50% of its capacity. After being completely discharged for half an hour when charged using a standard wired charger, the same process took a full hour when charged using a standard wireless charger compatible with the battery.

 

Is the speed of wireless chargers different from wired chargers

Fast charging with wired chargers, especially those using USB-C cables, is still the fastest way to charge compatible smartphone batteries. In spite of this, with the development of technology, and as is the case with the fast charging methods that were made available for wired chargers, there are fast ways to charge phone batteries wirelessly, although the fast wireless charging methods equivalent to fast charging methods using wired chargers are still not available for all phones so far. But the near future promises a lot when it comes to fast wireless charging technologies.

 

In the end, the reader may wonder what is the best. Does he use wireless chargers or wired chargers?

 

what is the best? Wired or wireless chargers?

 

Both types of chargers provide some advantages that the user may prefer at times, and then he alone has to choose between them according to his requirements. While fast charging with wired chargers is ideal when you want to recharge your phone's battery after a long day's work, and in no time before you're ready to leave the house again, on the other hand, you may find that wireless chargers are easy to use and give a sense of comfort. All you have to do is place your phone on the charging pad to start recharging the battery without having to drown in a clutter of cables, worry about wires being pulled out, or have to stay near a power socket.

 

what is the best Wired or wireless chargers

With wireless chargers, you can keep your phone handy at the dining table while you eat dinner, or at your desk at work while its battery is being replenished. The ideal and recommended option is to trade between the use of both types and take advantage of the advantages that each of them offers, but in the event that this is not possible, it is inevitable to charge using wired chargers, as they are small in size, practical and light in weight that can be carried with you easily to anywhere during travel in addition to the advantage Charging speed, but note, dear reader, that you cannot connect both types of chargers to the phone at the same time, thinking that this will help increase the speed of charging the battery, this method will not work for you anyway

 

Summary | The charging speed of phones in the case of charging using conventional wired chargers differs from that in the case of using wireless chargers. It is about half slower in the case of wireless chargers, in which the charging speed of the battery depends on the distance traveled by the electromagnetic field lines coming out of the transmitting coil located inside the charging plate and directed to the coil The receiver in the phone whose battery is to be charged with energy, which captures this electromagnetic energy and turns it into the electric current needed to charge the battery. However, the speed of charging batteries wirelessly can increase in some modern phones that use fast wireless charging methods, but these technologies are still not available for all types of smartphones.

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