Wireless charging for the phone confidently pushing wired fellows in transport, public places and at home. But not each of them is suitable for a specific smartphone, and the more it will quickly charge it. Therefore, we will further analyze the general principle of wireless charging, find out the conditions for its use in the phone, the pros, and cons of wireless charging and the main characteristics that you should pay attention to when buying them.
The device and the principle of wireless charging for the phone
Find out how wireless charging works for your phone. For its implementation, two induction coils are used: transmitting and receiving. The transmitting coil is located in the case of the charging station. As soon as the station is connected to the electrical network, an electromagnetic field arises in the coil. If a receiving induction coil is placed next to it, then, by the principle of electromagnetic induction, a field will also appear in it.
This leads to the generation of electric current, which charges the phone battery. The only condition for the so-called transmission of electricity over the air is a small distance between the station and the telephone.
The process of wireless charging itself goes as follows. The phone is located on the charging station site, and the station is connected to the network using a cable. During operation, various indicators light up depending on the stage and correct charging.
When the phone specifies that it supports wireless charging, this means the presence of an induction coil. If it is not there, then such a coil, called a receiver, needs to be put on the phone. Note that companies continue to actively fight for the small size and weight of gadgets, so that the transmitting and receiving coils are made flat.
But the receivers are of different sizes, shapes and are placed in different places of smartphones, including covers (more on). This means that the coil is chosen for a particular model and may not be suitable for another phone.
Types of wireless phone charges
Today, there are several basic types of wireless charging for the phone: desktop, embedded, power banks with such charging and car. But given the development of wireless technology, this list may well be replenished in the near future.
Desktop Charging. This is a classic device designed to charge gadgets indoors. One of the options is a round station on which a charged phone is laid in a horizontal position. A more convenient option – station stand. In it, the smartphone can be placed vertically or with a slope, which is more convenient for watching a video or receiving messages while charging a gadget.
Built-in charging . They are most often built into furniture, which looks stylish and eliminates the need to move the station during cleaning or in other cases. So, it is convenient to use the chargers built into the writing or computer desk, on the bedside tables or on racks in public places.
Powerbank. Power Bank is a battery that you can charge your smartphone without the lack of electricity. Today, the market is dominated by power banks with wired charging, but wireless models are also gradually occupying their niche. The principle of charge here is the same as in the desktop versions. That is, to start charging it is enough to put the gadget on a power bank.
Car charging . They are used both in private transport and in public. The peculiarity of this charge is to securely fasten while driving and possible shaking of the car. To do this, use a variety of clamps, brackets and other mounts on the windshield, air conditioner blowers or torpedo car. There is also a version in the form of a glass with a slot. In public transport, this device is still rare, but in the near future it may become the same everyday thing as a monitor with advertising. In particular, at the end of 2018, Optare promised, together with its partner AirCharge, to launch buses with built-in wireless charging in Britain.
How to choose a receiver for your phone
If the smartphone does not have an induction coil, you can buy it separately. It can be built into the case or go in the form of a film with contacts. He and the other version of the receiver for charging the phone is selected primarily by the type of connector available in the gadget. Consider some of the most popular options.
Micro USB . If the smartphone has such a connector, then the film receiver is mounted under the cover or on the case (under the cover) of the phone. At the same time, the receiver plug is inserted into this port. But when buying, we advise you to pay attention that Micro-USB have different connectors depending on the type of port. For example, for type C connectors, this is an oval, and for types A and B, it is a rectangle and a trapezoid.
Lightning . This is an option for installing a receiver for Apple gadgets. The film in the same way fastens on a back surface of the iPhone and can be closed by a cover from any materials.
Special contacts . A number of smartphones have special contacts for wireless charging. In this case, the film receiver is attached to these contacts. These receivers indicate which specific phone models they are suitable for.
Characteristics of wireless charging. Tips for choosing
Standards . There are different manufacturers standards that you need to be aware of for the right choice of wireless charging. The main ones include the Qi standard from the Wireless Power Consortium and PMA from the Power Matters Alliance company. Some gadgets support both standards, but in most cases, phones can be charged using only one of the two technologies. You can find out if a particular smartphone is working according to the Qi or PMA standard in its characteristics. Note that the wireless charging device should work according to the same standard. The more common is the Qi standard and is supported by many popular phone brands.
The type and compatibility of the device . Above, we have considered several types of wireless charging. The choice of desktop, car or other charging depends on where it will most often be used. Compatibility assumes that the station is suitable for phones of different models or different brands. There are also such charges which can be used for other devices like laptops, tablets or fitness bracelets.
Input and output parameters. Here, the first thing we recommend to pay attention to the maximum output current per port. The most common value is 1 A (1000 mA), as it is suitable for many smartphones and phones of low and medium price categories. But for energy-intensive flagships with a powerful processor and high-resolution display, a current of 2 A is desirable. Otherwise, charging will take a long time. The output power must be greater than or equal to the power of the battery of a charged smartphone, otherwise, instead of charging, you will get a discharge. Stations with high output parameters are usually noticeably more expensive than devices with low power and output current.
Hours . This indicator is not always indicated in the characteristics, so you have to learn it from the reviews. If charging lasts longer than four hours, it is considered slow. But in our pace of life, we are not used to waiting for four hours, so many models use fast charging. For its work, the smartphone itself must support such charging, and a specific technology. Among the most common fast charging technologies are the latest modifications of the Quick Charge standard. But the following standards can be used: Adaptive Fast Charging, Fast Charge 2.0 and others.
The originality of the model . The wireless charging market is growing, and with it, non-standard solutions are emerging. So, there are devices with two sites at once for simultaneously charging two gadgets. For example, this is the Samsung Duo EP-P5200TWRGRU model. The Skyway Energy Fast device has a stylish wood design. A model Xiaomi SmartPad Qi is a roomy rug on which you can charge not only a smartphone, but also a mouse or tablet.
Brand . Many branded models are distinguished not only by their stylish design and high product quality, but also by using the most modern technologies. In particular, it protects the device from overheating, high voltage, short circuit or falling into the charging field of a foreign object. Among the popular brands of wireless charging, we note Samsung, Xiaomi, Nillkin and Belkin, although they come on the heels of other companies.
Cable and power supply . Wireless charging is not always equipped with cables with power supply for charging from the network. And other models come with a removable or non-removable cable.
Pros and cons of wireless charging for your phone
Lack of cable . In everyday life, we usually do not carry with us a cable for charging a smartphone. Therefore, the presence of built-in wireless charging stations in public places will help to use the gadget at full capacity all day. While the phone is recharging, you can cheer up with a cup of coffee, eat or drive to the right place.
Less wear on the connector . Due to frequent use, phone connectors remain their weak link. As you wear out, you have to repeatedly reconnect the cable or move the contacts to finally charge. With wireless charging, not only wear is reduced, but also the risk of damage to the connector if you accidentally pull the wire.
Easy to charge . We are sometimes too lazy to get the cable and put the phone on charge, especially if you need to get out of a warm bed and try to get into the nest in the dark. And sometimes we just forget about the need for a charge and are forced to leave the house with a discharged telephone. With the charge on sight, this problem will occur less frequently, since putting the phone on the platform is very simple.
Ease of viewing . If the station has a stand, then with its help it is convenient to watch the video on your smartphone, without stopping charging it. Doing this while charging a gadget from a short wire is inconvenient: you must sit close to the outlet and handle the cable carefully so as not to damage the socket.
- Loss of functionality . If the phone is on a wired charge, with it, albeit with restrictions in terms of movement, but still you can fully work. In wireless charging, the number of available actions is significantly reduced.
- Charge slowdown . In most models, charging by wire is faster than by wireless. But the use of fast charge eliminates this drawback in many ways.
- Compatibility issue . Since wireless charging has appeared relatively recently, it is difficult for gadgets of the whole family to choose a universal station. However, in the future, this problem may not be so acute.
With the rapid development of the wireless charging industry, all their shortcomings in terms of loss of functionality, charging time and compatibility can become a thing of the past. In the meantime, it remains only to carefully select the charging for a particular phone.
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