How to prevent charging iPhone when USB connected

Well, I found the answer by myself here in the Apple Community. Sorry to haven't seen it before posting. Here is the topic I spotted: Prevent iPhone from charging while connec… - Apple Community

So the answer is definitively NO, you CANNOT prevent your iPhone being charged when plugged in a computer :-( The Android system has implemented this feature for power management and some manufacturers offer it as an option in the device settings, i.e. to NOT charge the device when plugged through an USB cable.

Topic marked as "Best answer" to avoid contributors to waste time with this already answered question. My apologies!

Thanks a lot @IdrisSeabright for sharing this!

I carefully read the topic When to charge your iPhone or iPad. Having been working in the chemistry industry and made research about some specific batteries, I almost agree with all the assertions except the one stating that charging to 100% in any fashion does NOT matter at all, meaning that 4 times from 20 to 45% is not STRICTLY the same as 2 times from 10% to 60%. This due to secondary reactions occuring in the polymer acting as a solid electrolyte and varying under charge status and other conditions.

This being said, it was a good reminder even though I will stick to charge my batteries as few as possible, from 10%-20% to 90%-100% whenever possible.

I checked for the Optimized Battery Charging setting in my iPhone and it was activated by default. A very goog article from Apple about this feature: About Optimized Battery Charging on your iPhone => About Optimized Battery Charging on your iPhone - Apple Support

@Laurence Finch, I take the opportunity to send you a big "Thank you" for your very valuable and detailed article about the way and the myths to manage Li-Ion batteries, in addition to my five stars :-)

Yes, syncing over Wi-Fi would the way to go. I just wonder if this is possible, i.e. allowed by Apple Marketing department, between a PC under Windows 10 with iTunes or the iCloud client. I can recall but not sure at 100% (is that correct English?) that it does work for a while as I tried this way of syncing once in 2020 my between my iPhone 8 / iOS 13.x device and my PC / iTunes and I was surprised to see it working as Apple don't make the Windows users life easy :-D

Just a fact at that time: there was no way to upload photos from an iPhone to a PC over a Bluetooth connection while this was quite natural to achieve between a PC and any Android device. I will also give a try to exchange files between a PC and an iPhone using NFC that is faster and more secure that Bluetooth. This could be cool for occasional transfers of specific files.

Thanks again to all your valuable inputs and advices

@IdrisSeabright, thanks to share your actual experience in the real life. This feedback proves that these secondary chemical reactions in batteries do not have an measurable impact on Li-Ion batteries lifespan. I maybe will become less cautious about that as from today!

Courcoul wrote:

As stated, charging is the one thing that cannot be disabled on a USB cable. You can finagle a USB cable to prevent data transfer (you cut one of the wires, there are instructions on the Intertubes), which is useful in concocting a 'secure cable' you can use in dodgy public USB ports that could try and pwn your device, but you can't prevent the juice from flowing.

As for moving data to and fro sans-cable, might I suggest exploring DigiDNA's iMazing utility, an iTunes successor which at least on a Mac platform allows moving any and all information. Can't test on any Windows flavor since I am all Mac, but I expect the product to work there as well.

Thanks for the suggestion. I had a glance at iMazing product page and it looks very powerful, user-friendly and inexpensive for the paying features. When Igive it a try in my Windows environment, I will report here my experience.