Wireless charging technology uses an electromagnetic field to transfer energy between two objects. The charging mechanism can be simplified by the fact that the first “charger” converts electricity into an electromagnetic field and the second particle, “the phone for example,” captures this field and returns it to electricity that it uses to charge the phone. And many mobile phone companies have turned to this technology, especially as it supports fast charging. Do these electromagnetic interactions have an effect on the internal battery components and on the chemical reactions that take place in it?

Is wireless charging dangerous for the battery?

Apple device users called for the wireless charging feature, similar to other companies, led by Samsung. It was added recently in the iPhone 8 and iPhone X, as if Apple added this technology to its devices timidly, or perhaps in delaying it a careful study, knowing that this technology must have certain standards so that it does not have a bad effect on the devices. Indeed, Apple has used the Qi standard for wireless charging.

The strange thing is that Apple introduced the technology slowly, which is 7.5 watts when using special chargers designed for the iPhone, and if any other charger is used, 5 watts are charged. While Apple's competitor, for example, Samsung, has been offering a 10-watt charger years ago. This matter had implications for this after that, it may be that using this technology is not good for charging your phone, according to research conducted on wireless charging technology and found a relationship between it and battery damage very quickly.

From that research: Research by Adrian Kingsley-Hughes of ZDNet concluded that the wireless charging used to charge his phone is wearing out his battery very quickly.

Charging method and its effect on the battery?

Venkat Srinivasan, director of the Argonne Cooperative Center for Energy Storage Science (ACCESS), said keeping the battery fully charged or close to that will accelerate its damage. This is what happens when you own a wireless charger in your home or office, and you put your device on it all the time to keep your phone charged at a high rate until you feel satisfied and comfortable.

He also said: “The higher the charging state to 90%, 95% or 100% while keeping these ratios for a longer time, the faster the battery’s condition will begin to deteriorate, depending on the nature of the lithium batteries.

It is strange that studies carried out by shipping companies have also proven that charging and discharging completely harm the battery and the severity of the damage varies depending on the type of battery. The study said that recharging the battery at a high level such as 50% can lead to an increase in its life by values ​​that may reach 4 times the value that it may reach when charging from zero to 100%.

The nature of lithium battery charging

When a lithium battery is charged and discharged, the ions pass back and forth between the positive electrode "made of lithium-cobalt oxide or lithium-iron phosphate" and the negative electrode "made of carbon graphite." When the battery is charged, lithium ions are released from the anode to the negative electrode and are stored as energy. When the battery is discharged, these ions return to the anode to be used as electrical energy. As these ions move back and forth, the material “electrolyte” - a substance containing free ions that form a conductive medium - begins to deteriorate over time. Thus, the higher the percentage of charge you have, the faster that material will degrade and spoil.

Therefore, it is best not to make the phone charged at high rates all the time, or to charge it from zero to fully charged all the time, in order to keep the movement of the charging and discharging pendulum from swinging significantly. Preferably, your charge percentage should range from 45% to 80%.

In addition, battery life depends mainly on the number of times of charging cycles it has gone through. For more information on this topic, you can review an article You ask and Islam's iPhone answers the Apple battery.

The difference between wired charging and wireless charging

It is difficult to compare wireless chargers and wired chargers, each of them has advantages and disadvantages, we mention a simple comparison between the two types as follows:

◉ When the phone is connected to AC power via wired charging, the battery will automatically disconnect the charge when charging is complete and take a break, and it waits to remove the charging cord only when the phone is not used, but if the phone is used during charging, the charging will continue to compensate for what the battery loses during the Turn on the phone. (Of course, the use is intended to be violent, such as games, and not normal use, such as the network, for example. "

As for wireless charging, it uses a constant current, and does not give the battery a rest period after the charging process is completed. During the flow of data to and from the device, the screen turns on for alerts, notifications, etc. when the battery is constantly charged and compensates for any small battery shortage, and thus it is counted in the number of charging cycles, which leads to battery wear and damage.

Wireless charging usually causes the battery and device to overheat, which could cause them to quickly damage other than charging with the cord. Therefore, it is preferable not to charge in closed and unventilated places, as it is necessary for air to dissipate that heat.

◉ Reliable wireless chargers are expensive compared to conventional wired chargers.

◉ Direct exposure to electromagnetic radiation from wireless chargers can be harmful to the body in the long run. This damage can be completely eliminated if a properly protected charger is used and this is available in reliable chargers that use Qi standards.

It is known that most smart phone battery manufacturers design the battery to last between two to three years, and if you are someone who replaces his phone during that period, you do not need to worry about the battery and the speed of its damage, especially since companies now like Apple provide replacement batteries at 20-30 prices. Dollars, which is a pittance compared to the price of the phone.

If you use wireless chargers, have you ever had a problem with them? Let us know in the comments.


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