Battery inefficiency and wear

Wireless chargers have become a must-have part for many of us. The comfort they provide is irrefutable, especially for long periods of load, for example on the bedside table every day. This has made them an especially interesting accessory that we do not stop recommending.

However, in wireless charging all that glitters is not gold. Wireless chargers continue to have inefficiency issues and are now especially counterproductive in the summer. Let’s talk a little about wireless charging, we already know the good side but … and the bad?

They are highly inefficient

Back in 2017 Apple finally decided to include wireless charging on the iPhone X and on the iPhone 8, something we all appreciated. Since then it has been maintained in all the new launches of the Cupertino company, even despite the fact that Apple itself has not been able to launch a wireless charger specifically developed for products around the block. However, recently on OneZero they have carried out a quite revealing study regarding the performance of these chargers. Obviously, nobody cares too much about how much a wall charger of our iPhone consumes.

But maybe things will change if I tell you that charging the iPhone with the Lightning cable has an efficiency rate of 95%, while a wireless charger can drop below 47% in many cases. Those are the results of the study, and it is that while a Google Pixel 4 charged from 0% to 100% by cable consumes approximately 14.26 Wh, in the same conditions the electrical consumption through a wireless charger rises to 21 , 01 Wh. The rest of the tests have reached an estimated average that the wireless charger consumes 0.25 Wh more on average than its wired rival.

Heat, a bad companion to the wireless charger

Wireless chargers, as we said earlier, suffer the loss of much of the energy through the heat they produce. Perhaps not having it in hand while charging, you have not noticed, but the reality is that charging the iPhone through a wireless charger usually raises the device to temperatures similar to those it reaches when we are using it intensively at the time we charge it with cable. This in summer causes that many users find that their devices have stopped charging at 80% after having been charging all night.

This is because the iPhone with its temperature sensors makes the determination to pause charging with the intention of keeping battery temperature levels below limits. In short, it is common, especially in summer, that your iPhone has stopped charging wirelessly due to the risks of having the device at high temperatures for a long time.

Harmful to the battery

To say that wireless charging is harmful to the battery in a generic way would be to practice demagoguery. The reality is that both by cable and through wireless charging you must take a series of precautions and responsibilities when charging your device, thus avoiding significant battery wear and therefore increasing the useful life of the device. However, if it is true that wireless charging, accompanied by user ignorance, can lead to premature aging of the battery and even dangerous circumstances for the stability of the device.

Systematically subjecting the device to high temperatures is one of the most determining factors in battery wear. Therefore, it is important that we always choose a wireless charger from recognized brands, and in the case of the iPhone at least bet on lower power charging technologies. I mean, it is absurd to bet on a “fast” wireless charger, when the purpose of these chargers is always to maintain a long charging system. Therefore, from my strictly personal opinion after years of reviews and tests, I cannot recommend any wireless charger over 5W unless it has an active cooling system.

Recommendations for using wireless charging

Far from discouraging the use of wireless charging, I have Qi chargers both on my nightstand and at my workstations, and it is that knowing its limitations and with well-defined guidelines for use, the wireless charger becomes a faithful companion in battles. These are some of the tips that I can give you about wireless chargers.

Optimized loading

  • Always use a Qi certified charger.
  • Always buy chargers from recognized brands such as Samsung, Moshi, Xtorm or Belkin (for example).
  • Avoid wireless charging if the charging station receives direct sunlight.
  • Avoid wireless charging in rooms where temperatures above 26 degrees are reached.
  • Try to avoid “fast” wireless chargers.

Another interesting note to keep in mind when we use wireless charging regularly is to have activated the “optimized charging” system that all iOS devices have integrated. It can be activated like this:

Related article:

What is and what is the optimized charge of the iPhone

If for any reason you want to enable or disable optimized charging follow the following path: Settings> Battery> Battery health and deactivate Optimized battery charging. It is important to know that optimized charging is activated by default in iOS 13 and that it comes into action when the iPhone has been connected to a power source for a long period of time.

If you follow these recommendations to the letter and you are clear about the limitations of
wireless chargers, you will be able to keep the health of your iPhone battery in good condition for longer. In this way you will avoid premature degradation and improve its performance. The truth is that these are aspects of which there is little talk in general, but which are extremely interesting to consider.

Although wireless charging is the most comfortable option, it certainly has points in its favor, but we should never forget the points against it.

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