More and more Android smartphones are getting wireless charging support. Samsung has gone further in this direction, as its top-end smartphones - Galaxy S7 and Galaxy Note 7 - support Fast Charge Wireless technology, which provides faster charging speeds for South Korean smartphones when using a wireless charger.
Since the Galaxy Note 5 supports fast wireless charging technology, the entire recharging process from 0% to 100% takes about one and a half hours, but this is not the point. The first time after switching to the 5.7-inch Samsung phablet from the iPhone 6 Plus, it seemed that wireless charging was really a very convenient and useful thing, but with every month of using this Android smartphone, the opposite opinion was formed.
The fact is that with daily use of a wireless charger, certain drawbacks come to light, which are almost elusive in a 14-day test. The main inconvenience when using wireless charging for the Galaxy Note 5 is the need to put the device exactly in the middle of charging, otherwise the device will not absorb electricity.
This is really a big inconvenience, since the key advantage of wireless charging is mobility: pick up - talk on the phone - put back. However, because of this annoying feature, you have to constantly make sure that the Galaxy Note 5 is placed on the charger exactly in the center. There were often times when the battery did not charge even one percent in several hours due to this error. Over time, this "feature" starts to freak out.
It makes no sense to say that the use of a wireless method of charging smartphones increases the duration of this process by 2-3 times, since everyone knows about this, but it is worth paying special attention to another issue. The fact is that when using wireless charging, the smartphone gets very hot, and since the Galaxy Note 5 supports fast charging, the engineers from Samsung even had to equip their own with a built-in fan, which creates a rather sick noise around itself.
For this reason, charging a smartphone with wireless charging near the bed at night is simply uncomfortable, since the human ear clearly hears the noise of a fan, and it is harmful to heat up the smartphone once again, since most technical breakdowns occur in this state.
If you put all these disadvantages together, then wireless charging does not create a pleasant experience. In some cases this can be really handy and cool, but in practice this feature is useless. Owners of the iPhone, and the owners of ordinary smartphones on Android, should not chase this function, since after using it for 2-3 months, 90% of users will surely get tired of it. The longer you use wireless charging, the more clearly it becomes clear that charging with a regular cable is safer, faster and easier.
It's understandable why Apple is in no rush to add wireless charging support to its iPhones, as this technology hasn't been finalized yet. Undoubtedly, this method of recharging the batteries is the future, but it will take at least another 5-6 years before it comes.
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It doesn't take much to equip your beloved smartphone with the flagship wireless charging function.
First, the base, which is also the charger. Most often it is performed in the form of a small round platform with an outlet for a charger. For the experiment, let's take an unnamed model with a nice blue backlight. Powered by a 5V, 2A power supply unit (regular USB), powered via a standard microUSB port. At the output, the device gives a current with parameters 5 V, 1 A, which is enough to charge most devices even in operating mode.
The second necessary element of modernization is the antenna, with the help of which the smartphone is charged at a distance. Usually this distance is minimal, by the way, but the convenience of using without wires for someone may be significant. For example, the base can be built into the dashboard of a car or put on a chest of drawers near the bed: you come, put it down, go to bed. And no searching for wires.
There are many different universal antennas for smartphones on the market. They are also suitable for other equipment, but here you need to think about placement. The antenna (we have an unnamed Chinese copy) is a coil with a board hidden in a paper-like envelope. A wire with a microUSB plug comes out of it, although if desired, it can be soldered to any other. Pay attention: the coil only works in one position in relation to the charger. Since the cable for connecting to the smartphone is flat, it may be necessary to open the bag and turn the coil for the antenna to work (as in our case). The coil should point with the open side towards the charger.
Attention: the required parameters of the power supply are indicated on the charging base (in the case of the used one - 5 V, 2 A). They need to be provided. At lower amperage, charging will be very slow. It may be necessary to replace the cord from the charger kit for adequate operation, since not every USB cable can pass a full 2 \u200b\u200bA through itself. As you can see,
Today it is already hard for us to imagine our life without mobile gadgets. This has led to the accumulation of a huge number of wires near household outlets, among which it is not so easy to find the necessary "charging". In this case, a wireless charger can help solve the problem. The principle of its operation is very simple - just place the gadget on a special panel to charge it. The accessory is based on the principle of operation of an induction coil. This technology is called Qi. It has become very popular lately. In 2015, the globally popular brand began selling furniture that will have a built-in wireless charging module. Today, all flagship smartphones support Qi. It is expected that soon transmitters or, in other words, modules can be found in airports, restaurants, cinemas, fast food, shopping malls, which will allow phones and tablets to be charged at any time. In fact, it will make life easier for users of mobile gadgets. We're entering a new era where we don't have to carry around for all the devices we use.
Wireless chargers for gadgets with Qi technology
The wireless power standard is called Qi. In Russian, the word is pronounced as "Tsi". The standard is named after the term of Eastern philosophy. It is developed by the WPC Wireless Electromagnetic Energy Consortium. This organization brings together global manufacturers of electronics and sets itself an important task - to standardize the process of charging gadgets by the induction method.
In the near future, all devices can be charged without being connected to the network. It's incredibly convenient. Each of us at least once faced a situation when. We have to urgently look for a way out. Soon, wireless charging modules will appear in all public places, as well as at every user's home. At home, you can simply place the module in a convenient place, and it will never get lost, unlike wired "charging". It is enough just to put a gadget on it and wait a little while the battery capacity is replenished.
The principle of operation of wireless "charging" is based on the properties of an induction coil to transmit electric current. In the school physics course, we were taught that when an induction coil is connected to a power source, a magnetic field arises in it, perpendicular to the turns of the coil. Thus, if you place two coils within the range of a magnetic field and at the same time connect one of them to a power source, then a voltage will appear in the second coil. It is important to take into account the fact that the two induction coils must never touch each other. This is a simple principle behind the work of wireless chargers that support Qi technology.
There are two flavors of the Qi standard. The first assumes charging at low power - 5 watts, and the second - at high power - 120 watts. High power Qi is currently not produced by manufacturers due to objective factors. With the 120 watt Qi, you can charge your laptop. The 5 watt Qi is used to refill the battery and phones. It should be noted that different amperage is required for the tablet and smartphone. The wireless charger for the phone generates 1 ampere of current, and for the tablet computer - 2 amperes. When choosing an accessory, be sure to pay attention to these characteristics.
Energy efficiency of Qi standard
A modern wireless charger has two components. One of them is built directly into the gadget that supports Qi and is called a wireless charging receiver. Basically, it is a receiver that conducts electrical current to the battery. The second component is called a transmitter. If the purchase of a wireless "charging" is meant, we are talking about the transmitter. They come in a wide variety of shapes and sizes. Mostly circular and rectangular transmitters are common.
To better understand how wireless charging works, it should be borne in mind that the magnetic field is capable of transmitting not only electric current, but also data about bytes and bits, which the developers of the Qi standard took into account. Interaction between the coils will occur only at the moment when a gadget with a built-in transmitter is close to the transmitter.
If the accessory for charging the gadget operates in the background, then the pulse sent every 0.4 seconds by the transmitter will not change the voltage in the coil built into the transmitter. It can be concluded that a modern accessory is able to recognize in which mode to function. As soon as a smartphone is nearby at a distance of several centimeters, the voltage in the induction coil will drop sharply, and the device will switch to active operation. As soon as the smartphone battery is charged, the corresponding signal will put the charger into the background. It can be concluded that modern wireless battery recharge accessories are energy efficient.
Is Qi technology safe?
Some users mistakenly believe that the Qi wireless charging function may be harmful to health. The point is that magnetic radiation is not ionizing. In its effect on the body, it is similar to a mobile communication signal, a radio signal. In this case, the signal of the mobile network, which comes from the tower, is stronger and has a continuous character, while the electromagnetic radiation disappears immediately after charging the smartphone's battery.
The power of the wireless chargers is 5 watts. It is not enough to have an effect on the human body. We can only speak of a negative impact when the power of such devices equals 120 watts. But such models are not produced on an industrial scale. This explains the lack of wireless laptop chargers. It is important to know that wireless battery charging technology has long been used in many models of electric shavers and electric toothbrushes, which once again proves its safety.
Which smartphones support the wireless charging function?
First of all, we want to note that not all gadgets today support the wireless charging function. Apple deliberately markets products that are incompatible with Qi. In this case, we recommend purchasing a special case with a built-in induction coil.
Flagship devices mostly always support Qi technology. These include such popular smartphone models as Samsung Galaxy S6, Sony Xperia Z4v, Samsung Galaxy S6 Active, Google Nexus 6, Motorola Droid Turbo, Nokia Lumia 930, Samsung Galaxy S6 Edge. Already, dozens of models from a wide variety of manufacturers can be charged using a wireless accessory, which provides maximum convenience for users.
Can I make a wireless charger myself?
Wireless chargers are quite expensive considering that they are a conventional induction coil. The question arises: "How to make a module with your own hands?" Basically, if you have knowledge of the basics of physics and special equipment for measuring the strength and power of an electric current, this will not be a big problem. Fans of radio electronics are capable of assembling not such simple devices, but we do not recommend conducting such experiments for ordinary users.
On aliexpress.com you can find separate wireless receivers for some smartphone models, including the Google Nexus line. It is easy enough to install it into your phone. Under the cover of the device there are two contacts that provide a positive and negative pole. It is enough to buy and connect the receiver, after which you can conduct a wireless charging test. This output is optimal if you somehow got a wireless charger, for example, you were presented with a gift, and your gadget model does not yet support the Qi function.
Wireless battery charging technology is gaining popularity in today's world. In the future, it will be possible to refill the battery capacity in many public places. It is expected that stadiums, parks, restaurants, cinemas, fast foods will be equipped with wireless chargers. When buying smartphones, we recommend that you pay borrowing to support the Qi function, which is present in all flagship models of 2015.
Modern technologies literally burst into our lives without demand. Once people could not even imagine that they would be able to communicate with each other at a distance of thousands of kilometers. Then the telephone was invented, and it became possible. But even then, people did not imagine that with these very phones it would be possible to walk along the street and make calls from any place pretty soon.
Today, technology has taken a step forward again, and the reason for this is wireless phone charging. Nikola Tesla could not even imagine that so soon his ideas about the transfer of an electric charge over a distance through the air would be implemented. In general, this has happened, and wireless chargers are gradually filling the market for accessories for mobile devices.
With the advent of any new technical solution, a sea of \u200b\u200bmyths is immediately created that have no sensible justification. So it happened with phone chargers. Let's look at some of the myths and try to dispel them. So let's get started.
Wireless charging is harmful to humans
Many are ready to defend their opinion to the last about the harmfulness of electromagnetic radiation generated by a wireless charger for a phone. However, representatives of the Wireless Power Consortium are already tired of proving that the waves generated by the charger have no effect on the human body. The fact is that they belong to the spectrum of non-ionizing radiation, and it, in turn, is not harmful to humans - this is firstly. And secondly, modern wireless chargers generate a magnetic field of only a few centimeters. That is, already at a distance of half a meter, it almost completely dissipates.
The phone can be charged via Wi-Fi
In fact, this is purely untrue. Yes, at CES 2010 a device was presented that is supposedly capable of extracting electricity from the environment. However, until now nothing has been heard about this device, and manufacturers of mobile devices continue to increase the capacity of rechargeable batteries.
Wireless chargers are not suitable for Apple gadgets
Quite a strange myth, the origin of which could not be established. On the contrary, all the latest smartphones of this brand have an NFC module for remote charging, and the choice of accessories for this is quite large: http://bilka.com.ua/category/besprovodnye-zaryadki-iphone/. In other words, the iPhone owner shouldn't have any problems in this regard.
The phone gets damaged if you use a non-original charger
It is a myth. It may charge worse or not charge at all, but it will not deteriorate. Of course, if we are not talking about fakes that are capable of creating short circuits.
Wireless charging wireless
Does wireless charging really involve no wires? Yes and no. There are really no wires from charging to the phone, but there are wires from charging to the network.
The phone cannot be used while it is charging
Myth. You can use it, just charging the device will take much longer. And in the case of wireless charging, it's just inconvenient.
Charging overnight is bad for your phone
Myth. Maybe before, when the device did not automatically stop charging, it was harmful to the battery and the phone, but now modern gadgets take exactly as much charge as they need.
You need to charge the phone only after a complete discharge
This is both true and myth. You only need to fully discharge your phone the first few times. Then, it is best to always keep the battery full. When fully charged, modern batteries last better and last longer.
how to quickly charge Galaxy S7 and S7 edge on wireless charging [updated 04/03/2016]
Wireless Qi-chargers for the most part give out a standard 1 amp load (voltage 5 volts) at the output.
However, smartphones are already equipped with built-in charging systems capable of accepting large loads (up to 1.4 amperes, according to Samsung), thanks to which they can be charged from a wireless charger one and a half times faster than other smartphones.
However, only on condition that they will be connected to the so-called, that is, one that is capable of providing an output of 1.4 amperes. S7 and S7 edge are also charged at normal speed from a regular ampere charging.
It is known that Sansung has already begun to produce Wireless Charging Stand models that support such "fast" charging, and in which, by the way, the smartphone is placed not horizontally, but vertically, so that it is much more convenient to use it during charging.
These new Qi-chargers have already gone on sale. As for prices, according to preliminary data, the Wireless Charging Stand will retail for about $ 80.
Here is a short video - for clarity (in the settings you can turn on the translation of subtitles, which "in general terms understand what the foreigner is talking about"):
what is Qi wireless charging?
In short, “Qi” (which is how the word Qi is pronounced) is the global standard for rechargeable batteries for consumer-grade mobile devices. Qi allows wireless charging of compatible devices' batteries using inductive energy transfer. Simply put, you simply place your smartphone on a dedicated transmitter plate without having to plug it into an outlet via a power supply or via a cable to a computer's USB port.
where is Qi wireless charging used?
Today, this technology, like Wi-Fi, is widely used in hotels, airports, train stations and other public places. In addition, Qi charging is also available in the form of inexpensive and compact devices, focused on use in the home or office. Like, for example, EC Technology's ultra-thin wireless charger, which costs $ 21 on Amazon.
can i use Qi?
Yes. If your smartphone has support for Qi technology, then any wireless Qi charger is suitable for you. Moreover, it is not necessary to spend money only on expensive models, which the manufacturer of your smartphone recommends as an official accessory. Any high-quality Qi charger from so-called third-party brands is also suitable.
What is the Qi charging power?
The low-power Qi wireless charger is capable of delivering up to 5 watts of power at a distance of up to 4 cm (in theory), and the medium-power model up to 120 watts. In practice, the aforementioned Qi charging EC Technology can charge the Nokia Lumia 735 smartphone, which is located no more than 2 cm above the transmitter. Therefore, the best option is when both devices are in direct contact with each other.
How fast is Qi wireless charging capable of charging a smartphone or tablet battery?
As a rule, smartphones, and especially tablets, charge noticeably more slowly through a wireless Qi charger than through conventional chargers. For example, EC Technology Qi charging supports a current of 1A, which is enough to recharge the smartphone battery at a normal pace, but not enough to quickly charge the battery of the Nexus 7 tablet, whose standard charger produces 2A.
qi wireless charging: how to use it?
Step 1 ... We plug the Qi charger into an outlet (yes, it charges wirelessly, but it works from the mains) or connect it to the USB port (for EC Technology, the USB cable is included in the delivery set) of a computer, tablet or external mobile battery.
Step 2 ... First, we check again if our smartphone (or tablet) supports Qi wireless charging technology. The data can be found in the model specification. On smartphones with removable back panels, Qi system elements can be seen on the back of the lid. In addition, some manufacturers produce Qi adapters for models in which Qi charging is not supported initially. For example, for its Galaxy S4, Samsung has developed a Qi back cover that can be replaced with a regular one.
Step 3 ... Just place the smartphone on the wireless charging pad. You will feel how it begins to vibrate, and you will see how the color of the indicator light changes - it means that the battery has begun to charge. Upon completion of the procedure, we take the smartphone from the panel.
rear panel smartphone Nokia Lumia 735 with Qi system elements
Actually, this is how Qi wireless charging works. For the average user, of course
