It’s time to figure out: is it possible to use wireless charging for the iPhone? Or is it really because of this that the battery of a smartphone crashes faster?
thanks re: Store for useful information.
How does wireless charging work?
Most smartphones equipped with wireless charging provide it in accordance with the international standard. Qi (read Qi)
According to him, 2 flat wire coils are used to transfer energy from the charger to the smartphone, whether Samsung or iPhone.
One of them is the base and is connected to an energy source (power supply plugged into an AC outlet 220V), and the second is inside the charging device and is the receiver.
In the process, the initial detection occurs as a result of a deviation of a change in the capacitance or resonance of the transmitter coil.
It is enough to attach a smartphone with the corresponding Qi-coil under the cover to the charging base, as the process of energy transfer. charging the battery begins.
To control the charging process, start or stop it on time. To do this, the Qi-base and Qi-receiver can exchange system information.
Once the object has been detected, the base station checks to see if it is the Qi-compatible device that is located on it and transmits data. If it sends a response signal, charging starts.
During the charging process, the Qi device sends control data packets to adjust the power level and finally stop charging when the mobile device is fully charged.
I read that wireless charging is harmful. It’s true?
Last year, the author of the publication Zdnet reported terrible news: wireless charging and leads to premature wear of the iPhone battery.
The message was immediately circulated by the media with frightening headlines: “Wireless charging kills the iPhone’s battery,” “iPhone’s battery life is only six months!”
Fortunately, the author had a completely different view.
Apple ensures that the smartphone’s battery loses after 500 charges no more than 20% of initial capacity, and this will happen no earlier than in 2 years.
Using a conventional charger, the user reaches this figure after 800 or more charges, or 2-3 years. And with wireless. already through 18 months.
But why is this happening?
Why is charging warming up?
To correctly answer this question, you need to rephrase the question: why is wireless charging less efficient than wired?
The answer is simple. It is enough to recall the school physics course.
When transmitting current through a wire, the efficiency is quite high if a high-quality wire is used. With his help baboutmost of the current reaches the smartphone. Heat dissipation into the environment is minimal.
With wireless charging, a significant part of the energy is dissipated and converted into heat, in heating of charging elements and the smartphone itself.
Does this mean that wireless charging cannot be used?
Relationship between heating and battery life
Does it affect the battery life of the iPhone? Of course. But not so much as to refuse a convenient way to keep the gadget always with a full battery.
On the other hand, endless charging:
- probably spending charge cycles;
- causes the battery to constantly, albeit slightly, heat up.
Such operating conditions are stressful for any Lipo-elements. What is it. for any batteries, constant heating is harmful.
The passage of current during electromagnetic induction is impeded by metal elements. for example, a plate for an automobile magnetic holder or a cover coated with silver paint (silverfish, paint based on aluminum powder).
A smartphone with a battery case, a thick case or a metal case can also behave.
All this can lead not only to 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 charging may well be its advantage: the Qi standard provides an option with low power from 0 to 5 W and average power up to 10 watts.
For comparison, a regular iPhone charger has a power of 5 watts. For fast charging. 15-18 watts. The charging "head" of OnePlus provides 40 watts. A slow charge is more useful for the battery.
Especially if you use the right accessories. The maximum power that iPhone consumes when wirelessly charged, does not exceed 7.5 watts. no longer makes sense.
A pair of smartphones cannot be charged 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 integrate 2 or more coils.
The condition "high power = more heat" is absolutely true. over, if the charging base will emit increased power. it will heat up more. But the smartphone will only take the necessary energy.
So that the coil in the smartphone, and, accordingly, the smartphone itself does not overheat, gadgets use “smart” algorithms, changing the power of the charging current depending on battery temperature.
Therefore, even with the same power of wired and wireless charging, replenishment with Qi will be longer: coil heating will be added to the battery’s own heating.
And this does not take into account the reduced power of Qi-charges for the iPhone compared to wired and the smartphone’s own heating.
Known issues with wireless charging
Since wireless charging creates a strong electromagnetic field, there may be problems with wireless networks, and some smartphones will start to fail.
For example, a poor-quality loop to the screen can lead to interference on the display, similar speaker soldering damage. to rustling in the audio section.
Poor-quality wireless chargers can “make noise". emit a high-frequency sound that accompanies induction.
Since charging should send regulatory packets, substandard models can supply increased or reduced current. In addition, the battery may be recharged.
Only the iPhone with the built-in, native wireless charging module is insured against this, since the iPhone 8 and iPhone X limit the charge level to 80% when the battery is heated.
But not before. A sharp power surge can disable the smartphone if the temperature rises abruptly.
If iPhone is connected by cable Lightning to the computer’s USB port or to the network adapter, it will be charged through the cable, and wireless charging will not be used.
Rules for Using Wireless Charging
How to extend iPhone battery life when using wireless charging?
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 are the main guarantee of security.
Other rules are not so binding. After all, a 20% battery degradation is hardly noticeable. Yes, 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 recharging the battery to 80% and, in principle, do not store it on the charger.
It’s also not worth using energy-intensive applications, especially 3D games or navigation programs that make the processor work at maximum frequencies, while charging. This leads to overheating.
Simple compliance with the rules will make using the iPhone much more enjoyable and reliable.
1. Wireless charging affects the battery in the same way as others. The difference is almost impossible to notice.
2. Fast charging, wired and wireless, faster than usual disables the battery.
3. Permanent connection to the charger harms because it consumes stock.
4. Launching “heavy” applications during charging can lead to serious overheating.
5. With wireless charging, network jumps are even more dangerous. It is advisable to connect them to stabilizing devices.
6. The main harm comes from poor-quality chargers and cables.
Well and the main thing: buy good, high-quality wireless charges. And only in proven places. Otherwise, it will be like this.
(4.67 out of 5, rated: thirty)