A practical study demonstrating the real difference between fast and slow iPhone charging

In a world where charging speeds are increasing day by day, the most important question for smartphone users remains: “Is it Fast shipping Does it really damage the battery? There's no definitive answer. That's why HTX Studio tried to uncover the truth in an extensive experiment that lasted several months, using a range of Apple phones to test the difference between slow and fast charging in real-world conditions. The results surprised many and challenged common misconceptions about the correct way to charge a phone.


Fast and slow charging

In a six-month experiment, the HTX Studio team (a YouTube channel specializing in technical reviews, innovative technology, and electronic products) conducted an in-depth test. For iPhone batteries To determine how charging speed affects performance and lifespan over time, the team used six iPhone 12 models to conduct a realistic and accurate test simulating everyday user experience.

The experiment began by repeatedly charging the phones from 5% to 100%. Three devices underwent fast charging, while the other three were charged slowly. In a separate experiment, another group of phones were charged within a different range, starting at 30% and stopping at 80%, to determine if keeping the battery within this range maintained its efficiency better.


Experiment results

From PhoneIslam: A hand lifts the battery from inside a partially disassembled iPhone, revealing the internal electronic components responsible for fast charging and the battery.

After 500 full charge cycles, the team examined the remaining capacity in each battery and discovered that the difference between fast and slow charging was negligible. Fast charging did not appear to cause any noticeable deterioration in battery life. Maintaining the charge between 30% and 80% showed only a slight benefit, but it wasn't significant in real-world use.

At the end of the experiment, the team concluded that the best way to charge an iPhone is simply the method you prefer. There's no need to worry excessively about charging speed or percentage. The difference in performance is negligible and not worth sacrificing your convenience or overthinking technical details.

It should be noted HTX Studio tested the effects of fast charging on 40 phones over two years. The experiment involved precisely charging and discharging the devices under various conditions, including different charging speeds and battery levels, to reveal the impact on battery health and phone performance. The test also included comparisons with Android phone batteries, and the results showed similarities, confirming that modern technology is now capable of handling fast charging efficiently and without any issues.


In conclusion, while recent studies show that fast charging doesn't pose a real threat to the battery, some simple habits can help maintain its efficiency for as long as possible. It's advisable to avoid leaving your iPhone charging for extended periods after it reaches 100%. Also, avoid exposing the device to high temperatures while charging. Regularly updating your operating system is also recommended, as iOS includes features and improvements for power management. Furthermore, if you're a heavy smartphone user, consider enabling the Optimized Battery Charging feature, which automatically slows down charging at certain times to preserve battery life in the long run.

Do you prefer fast or slow charging when charging your iPhone? Let us know in the comments!

Source:

macrumors

14 comment

comments user
Shady Mustafa

The video is misleading. The video shows an experiment between a 5W charger and a 120W charger, but the experiment in the video was between an 18W charger and a 120W charger. The phone will not receive more than 21W, so the result is a small difference in effect. If he had actually used a 5W charger, the result would have been a big difference because the 5W charger is indeed much better for battery health.

comments user
Amir Taha

Long live justice! 😀
In short, just relax and don't worry.
But from experience, the thing that affects the battery the most is excessive heat.

comments user
arkan assaf

From my experience, I charge my iPhone from 40% to 85% and keep it between those two percentages. After two years of use, I've had 370 charge cycles (it doesn't count as a full charge cycle, but the battery health was 87%), even though I used it heavily. Honestly, I agree with the YouTube channel's test because Chinese phones like Huawei offer fast charging and better battery performance than Samsung and Apple.

comments user
Anonymously

I think the most important thing is that the temperature doesn't reach high levels.
Personally, I think that when I charge my phone slowly with a 20W charger instead of a 30W charger
The battery lasts longer
The best course is the middle way.
A 20W charger is sufficient if you charge while sleeping.
A 30-35W charger if you're in a hurry and want to charge quickly
It's not necessary for it to charge to 80% in order to complete a charging cycle, because the full cycle is completed when it reaches 100%, even if it's done in several stages.

comments user
man man

I prefer a fast charger and I don't worry about it. I got an iPhone 15 Pro Max to enjoy, not to be bothered by it.

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comments user
Mohammed Jassim

Even in modern iPhones, there is a feature in the settings that allows you to specify the charging limit, such as 80 or 90. This seems like a veiled admission that overcharging is harmful!
For me, what is harmful is dropping below 20% with the phone being hot or the surrounding hot environment with non-original chargers!

comments user
Tala

Slow charging is best because it's safer.

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    comments user
    Reda Al-Shammari

    not

comments user
Mohammed Jassim

The real issue isn't the charging speed. The phone itself is programmed for the speed it accepts; a 5W charger will still charge at the same percentage even if you charge it at 20W! The real problem is letting the battery drain completely or below 20% and then charging it to 100%. This is what damages the battery, especially when it drops below 20% to 0%. I have an iPhone SE (1st generation) and I make sure it doesn't drop below 20% or exceed 100%. The battery health is 90%, and I've had it for over 5 years since I bought it! My Apple Watch Series 8 lasted a year and a half, and I charge it with a Series 4 charger. The battery health is 96% because of the old charger, the slow charging, and the heat, even though it's an Apple charger designed for Series 4! Similarly, my Series 4 Apple Watch (82) has had a battery health that's over 5 years old!
Of course, there are glitches, and the battery can drop below 20% or rise to 100%, but these are rare, except for the Apple Watch Series 4, which I often forget about; it charges to 100%.

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comments user
Orhan

Battery life depends on the number of charge and discharge cycles.

comments user
Akram

First of all, God bless you
My phone is a 15 Pro and the battery health is 93% because I use a slow charger and the charging percentage stops at 80%.

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comments user
safwat morshedy

So, the 20% to 80% figure is a myth?

comments user
Abdul Majeed Al-Absi

I prefer express shipping and I don't believe in shipping restrictions at a certain percentage.

comments user
Mohamed Hosny

This is another lie from Apple, who were fooling us by pretending they knew what was best for us, only to give us slow charging and short battery life.
I wish I could find a Samsung with an Apple operating system.

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