Wireless charging technology has finally become very common after years of waiting. From coffee shops to car dashboards and mouse pads, you can find wireless chargers. This technology is very easy to use, and if your gadget supports wireless charging, just place it on the desired surface.
In the meantime, we must note that not all wireless chargers are the same and from They benefit from different standards. On the other hand, we should not ignore the disadvantages of this technology. In this article, we will look at the nature of wireless charging, the difference between wired charging, and its advantages and disadvantages.
How does wireless charging work?
Wireless charging is based on electromagnetic induction. Simply put, the passage of alternating current, called AC, through a copper coil creates a magnetic field in its vicinity. If another coil enters this range, the magnetic field in question can generate electricity. For wireless charging, the primary coil is located inside the charger, which receives the required energy through direct power. A secondary coil is also built into the smartphone to which the induction current is transmitted wirelessly.
Because of this process, phones with wireless charging must be equipped with a plastic or glass back panel because the metal in the induction current process Disrupts. Of course, over the years, some companies have tried to circumvent this restriction. For example, the back panel of the Pixel 5a is mostly made of metal, but part of it is based on plastic to make wireless charging possible.
It should be noted that the new gadgets use more advanced components to use wireless charging. And the mechanism implemented is not so simple. For example, new handsets and wireless chargers must communicate with each other to determine charging speed and other parameters.
Until a few years ago, several different standards competed with each other in this area, but now the Qi standard takes precedence, which is why most gadgets support this standard. Having a common standard has many benefits because you can buy different devices and chargers from different brands without having to worry about coordination. And recognize objects provided. The latter is very important because if you accidentally place metal objects such as coins on the charging pad, it may heat up the charger quickly. But Qi-based chargers are only activated when gadgets based on this standard are placed on the charging pad.
This standard also allows the use of different speeds for charging. Although it currently has a maximum speed of 15 watts, many gadgets and handsets support wireless charging speeds between 7.5 and 12 watts.
Different wireless charging standards
Although most chargers and gadgets meet the Qi standard for wireless charging They do, but some companies, such as Oppo and OnePlus, have developed their own standard to do this so they can offer higher speeds. The OnePlus 9 Pro, for example, supports 50-watt wireless charging, and thanks to this speed, the battery can be fully charged in just 40 minutes. Oppo has gone a step further with a 65 watt wireless charging speed. On the other hand, we can mention the 6-pixel series, which supports 23 watts for wireless charging. Due to the exclusivity of these standards, you should use the charger provided by the company.
But as we said, most wireless chargers on the market are based on the Qi standard, which has a lower speed than proprietary chargers. present. Some users think that the Apple Magsif is the company's proprietary standard, but we must say that Apple also uses the Qi standard, but Magsif-based gadgets have a magnet that allows the Magsif charger to be placed exactly on the back of the phone. Official Magusif chargers offer a 15-watt charge speed, but if you place the iPhone on a regular Qi charger, you'll have to settle for 7.5 watts.
It should be noted that gadgets such as the Samsung Galaxy Watch 4 and Apple's AirPads Pro also use the Qi standard for wireless charging. However, these gadgets have much smaller coils and you have to use a suitable charger for them. The Apple Watch also supports wireless charging but is only compatible with Apple approved chargers. Of course, some say that this is a software limitation.
Is wireless charging better than wired charging?
In terms of convenience, wireless chargers are usually used. It is much easier than wired chargers. However, if criteria such as speed, efficiency and heat are taken into account, the situation will change. In this article, we noted that the maximum speed of the Qi standard is 15 watts, and although some proprietary standards in the field of speeds of up to 65 watts have been made possible, but on the other hand, we should mention phones like Xiaomi Mi 10 Ultra that have a speed of 120 watts. Watt supports wired charging. Overall, the number of handsets with high-speed wired charging is much higher than the number of handsets that use high-speed wireless charging.
If you are wondering where the rest of your energy is going, you should Let's say that this energy is converted into heat, and this heat is another important challenge for companies. As you probably know, heat reduces the battery life of your phone. That's why smartphones and wireless chargers should have features to prevent overheating. Many companies, such as Samsung and OnePlus, have built-in fans in their wireless chargers, some of which make significant noise.
Reverse wireless charging
Other new features of some phones include reverse wireless charging. It works like a regular wireless charger, but in this case, the phone itself becomes a wireless charger. To do this, the phone can generate a magnetic field using battery power, and the gadget receives the required energy by being placed on the back panel.
All the disadvantages mentioned here also apply. This process wastes a lot of energy and therefore drains a significant portion of the phone's battery capacity to charge a smartwatch or wireless headphones. That's why manufacturers recommend connecting your phone to a charger while doing this.
Although it is possible to use this method to charge another phone, it is because of its low performance and speed. , It is best to do this only in case of emergency.
If your phone supports wireless charging, do you use this feature or do you still prefer to use wired charging? Leave your comments with us and others in the comments section.
- Overview of the history of wireless charging technology
Source: Android Authority