And what are the disadvantages?
I would like to say that they do not exist, but they are not. The main disadvantage of wireless charging technology is that it is less energy efficient. The smartphone will not charge as quickly as when the cable is connected, and electricity will be used less efficiently, and some of it will go away in the form of heat. However, slow smartphone charging shouldn’t bother you if you can always put your smartphone on the rug at home or at work.
Another disadvantage is the rather high cost compared to conventional chargers. This is a more complex technology, and another nuance follows from this. Wireless charging is difficult to integrate into a device that is too thin.
Everything you need to know about wireless charging
It would be great to never charge your smartphone, or if it charges without any contact while connected to a Wi-Fi hotspot. Unfortunately, today no manufacturer can promise you this, but there is a way to forget about the need to connect a cable for charging. It’s about the so-called wireless charging. Today the Qi standard is actively developing, and many devices already support it. Let’s figure out what it is and whether we should use it.
What is it?
So, as said, wireless charging allows you to recharge your device’s battery without having to plug in a power cable. Nevertheless, a charging contact is still needed, and the device will not start charging until it is placed on a special charging platform or mat. Some devices natively support wireless charging technology, and the necessary elements are built into the case, and some devices can be taught to charge wirelessly using a special case, which, however, seriously increases their size.
Supported devices are inductively charged, which means that the element required for wireless charging is nothing more than a coil that is charged with electromagnetic fields. This process takes place unnoticed by the human eye. The only thing you will see is the battery charge indication on the smartphone screen.
Why is it needed?
In fact, using a charging cable is not convenient enough. Cables wear out, get tangled and get lost. It is much more convenient to have a site that is always in one place, at home and at work. The Qi standard is widespread today, and today wireless chargers can be found in cafes, hotels and many other places. It’s more convenient than looking for an outlet and cable suitable for your smartphone.
Finally, the last and most unobvious plus can be appreciated by the owners of devices protected from moisture. When there is no need to connect the cable, there is no need to open the plug on the case, which wears out quickly enough and is not very convenient.
Which devices support wireless charging?
Almost every modern device supports wireless charging, but some, like the iPhone, won’t be able to charge without an optional accessory. Devices from Asus, Google, BlackBerry, HTC, Cat, LG, Kyocera, Motorola, Nokia, Samsung, Sony and Yota Devices support wireless charging. A complete list of such devices can be found at this link.
I read that wireless chargers are harmful. It’s true?
Last year, the author of ZDNet broke the terrible news: wireless charging is causing premature wear on the iPhone battery.
Fortunately, the author meant something completely different.
Apple guarantees that the smartphone battery after 500 charges will lose no more than 20% of its initial capacity, and this will happen no earlier than after 2 years.
Using a conventional charger, the user reaches this figure after 800 or more charges, or 2-3 years. And with wireless. after 18 months.
Wireless charging rules
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It is enough to follow a few simple rules. Exactly the same as when using conventional, wired charging. A quality accessory, cable to it and power supply is the main guarantee of safety.
Other rules are not so binding. After all, 20% battery degradation is not really noticeable. And we change smartphones at least once every 2 years.
If these figures are scary, it is enough to remove the smartphone from charging after replenishing the battery to 80% and, in principle, do not store it on the charger.
It is also not worth using power-consuming applications while charging, especially 3D games or navigation programs that force the processor to work at maximum frequencies. This leads to overheating.
Simple adherence to the rules will make using the iPhone much more pleasant and reliable.
How wireless charging works?
Most smartphones equipped with wireless charging provide it in accordance with the international Qi standard (read “Qi”).
According to it, 2 flat coils of wire are used to transfer energy from the charger to a smartphone, be it a Samsung or an iPhone.
One of them is a base and is connected to an energy source (a power supply connected to a 220V AC outlet), and the second is located inside the charged device and is a receiver.
During operation, the initial detection occurs as a result of the deviation of the change in capacitance or resonance of the transmitter coil.
It is enough to touch the smartphone with the corresponding Qi-coil under the lid to the charging base, and the process of energy transfer begins. charging the battery.
To control the charging process, start or stop it on time. For this, the Qi base and the Qi receiver are able to exchange system information.
Once the object has been detected, the base station checks to see if the Qi-compatible device is located on it and transmits data. If it sends a response signal, charging starts.
During the charging process, the Qi device sends out control data packets to adjust the power level and finally stop charging when the mobile device is fully charged.
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The relationship between heating and battery life
Does this affect the life of the iPhone battery? Certainly. But not so much as to give up a convenient way to keep the gadget always with a full battery.
- likely wastes charge cycles;
- causes the battery to heat up constantly, albeit slightly.
These operating conditions are stressful for any LiPo cell. But what is there. for any batteries, constant heating is harmful.
The flow of current during electromagnetic induction is impeded by metal elements. for example, a plate for a car magnetic holder or a cover covered with silver paint (silver, paint based on aluminum powder).
A smartphone with a battery cover, a thick cover or a metal case can behave in the same way.
All this can lead not only to the complete inoperability of charging, but also to additional heating of the case.
Wireless or wired? Which is faster?
In fact, the main disadvantage of wireless chargers may well turn out to be an advantage: the Qi standard provides for an option with a low power from 0 to 5 W and an average power of up to 10 watts.
For comparison, a regular iPhone charger has a power of 5 watts. For fast charging. 15-18 watts. The OnePlus charging head provides 40 watts. And slow charging is better for the battery.
Especially if you use the right accessories. The maximum power consumption of an iPhone wirelessly does not exceed 7.5W. no longer makes sense.
Do not charge a couple of smartphones at the same time.
In addition, all wireless chargers are built on the same coils providing 5V / 1A. To transfer more power to the smartphone, manufacturers build in 2 or more coils.
The condition “more power = more heat” is perfectly valid. over, if the charging base emits increased power, it will heat up more. But the smartphone will only take the energy it needs.
So that the coil in the smartphone, and, accordingly, the smartphone itself does not overheat, gadgets use “smart” algorithms that change the power of the charging current depending on the temperature of the battery.
Therefore, even with the same wired and wireless charging power, recharging with Qi will take longer: the coil heating will be added to the battery’s own heating.
And this is without taking into account the reduced power of Qi-charging for the iPhone compared to wired and the smartphone’s own heating.
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What is wireless charging
Of course, the main benefit is how induction charging works. There is no need to be permanently tied to a physical connection and a 220 volt power grid. In order to provide power to your iPhone remotely, you need to have a device in your home, which is commonly called a wireless charger.
So, such a device transfers energy from one device to another, based on the principle of electromagnetic induction. When the magnetic field changed, an electric current began to be generated. The wireless charging design features an induction coil that carries high frequency and alternating current.
Thanks to this current, changes are made in the characteristics of the magnetic field. Energy transfer takes place between parts such as transmitter and receiver. There is no magnetic field outside the memory, and it itself will be absolutely harmless to the user. Thanks to the latest technologies used, a smartphone can be supplied with up to 15 watts of voltage, which significantly reduces the time required to charge it.
Schematic diagram of wireless charging for phone
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IPhone Wireless Charging Models
Models of many modern gadget manufacturers have acquired this option in recent years. Apple was no exception in this regard. Before buying a new Apple device, many users are in a hurry to clarify whether it is compatible with a wireless charger? Of course, this manufacturer prefers to keep up with developing technologies, for example, getting rid of outdated connectors.
However, not all models will feature this feature. precisely, they support wireless charging of iPhone gadgets from the lines released later than 2017. Let’s take a closer look at this list:
- iPhone 8, as well as modification 8 X;
- iPhone X;
- iPhone XS and XS MAX;
- iPhone XR
- iPhone 11, iPhone 11 Pro, iPhone 11 Pro MAX.
This means that the manufacturer has already equipped the above models with a built-in magnetic coil. Do not worry that it affected the weight and dimensions of the device. even with the coil, they retained the same elegant, stylish and slim body.
Should owners of models such as the iPhone 4 or 6, or other variants that were produced before 2017, despair? The standard way to charge them is to use the mains power supply and a charging cable. However, Chinese engineers could not pass by the opportunity to create another convenient device for this consumer category. Therefore, there are also devices on sale that simulate charging from a wireless charger.
Which iPhone models are compatible with wireless charging
In recent years, the iPhone and Apple gadgets have been constantly improved. Many of them today support wireless charging, which users are actively using. An alternative can be the use of special cases and chargers based on the induction method.
How to properly use iPhone wireless charger
To properly turn on and use the iPhone charger without a cable, you need to familiarize yourself with its designs and principles of operation. The most common option was and continues to be the so-called “plate”. It is a fairly thin board equipped with a magnetic coil. To synchronize with the gadget, a Lighting connector is provided. It is enough to connect a plate to it, and the charge begins to flow.
In this case, only the Lighting connector holds the plate on the phone case. There is a risk that a disconnection will occur and she will fall to the floor. It is recommended to provide additional protection with a removable bumper.
Another kind of charger without a wire for different generations of iPhones is the platform type. In principle, this is almost identical to the above-described option. Often, an Apple smartphone is first installed in a specially designed holder. Now the wire is connected to a regular power supply. Today, it is more and more common to find devices of this type on the office desks of managers or even in cars when traveling. The disadvantage of this design can be attributed to the fact that the smartphone should be kept strictly in one position, which excludes its use when charging.
Another interesting option for a wireless charger is a case that not only performs protective functions, but also charges the battery. It can be called quite popular among iPhone owners of various generations. The rear bumper can be removed and put back on at any time. As long as it is put on the back of the case, the charge will go. However, it will not be able to protect the front part, so you need to separately put a protective film or glass.
The manufacturer placed the battery under the rubber bumper itself. With a special connector, it connects to a smartphone. Conveniently, as soon as the charger is discharged, it can be charged in the traditional way using an electrical outlet. If the user wants to get a device with a large charge, then he must rely on the fact that the bumper will be distinguished by an impressive thickness.
An alternative to the protective case is another type. a case for a wireless charger. It is installed in the same way and is attached to the back of the smartphone case. The device is synchronized by type, like the Qi-plate. You can charge the gadget and operate it at the same time. However, official products of this type are not produced, so you need to look for Chinese counterparts.
Wireless “chargers” are quite universal designs and are suitable for many phone models, regardless of the presence of connectors on them. They do not need to purchase any special cables, they do not take up much space and are easily transported. On the other hand, the existing versions of induction models are so far incapable of recovering capacity as quickly as the charger from the mains and cable.
The existing power of a wireless charger allows it to restore capacity in iPhones and other gadgets like smart watches, etc. However, in the future, it will be possible to use this device for a wide range of Spectra equipment and equipment, because manufacturing companies are constantly working to improve the technology. It is likely that this will affect computers and even electric vehicles.