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Teardown of Apple 40W dynamic power adapter with 60W max

chargerlab.com

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Re: Teardown of Apple 40W dynamic power adapter with 60W max

#71
post #67

Why do so many websites disable pinch-to-zoom for mobile users? This page is full of interesting close-up photos, but at least on my Android phone, I can't zoom in to see any of the details. Who benefits from disabling this feature?

I am able to pinch to zoom fine on my iPhone

The issue seems to be with Chrome based browsers.

Re: Teardown of Apple 40W dynamic power adapter with 60W max

#72
post #64
post #48

Earlier quoted context omitted.

The concern isn't that a 9000W charger will fry a phone expecting 30W, it's that charging at 30W subjects the phone/battery to more stress/wear than charging at 5W.

What is the logic or science behind that claim? I’ve fast charged my iPhone 16 pro (heavy user) daily if not more often for a year using Apple chargers with the charge limit set to 80%. Remaining battery capacity is still 100%, which is something I’ve never had after a whole year. Fast charge doesn’t seem to hurt.

> Fast charge doesn’t seem to hurt.

For me a year is nothing though, my phone is on its 4th year, my daughter has my old iphone X.

Re: Teardown of Apple 40W dynamic power adapter with 60W max

#73
post #67

Why do so many websites disable pinch-to-zoom for mobile users? This page is full of interesting close-up photos, but at least on my Android phone, I can't zoom in to see any of the details. Who benefits from disabling this feature?

A workaround: Long press on image, "open image in a new tab"

Re: Teardown of Apple 40W dynamic power adapter with 60W max

#74

Earlier quoted context omitted.

There really aren’t any nuances to be aware of here. If the charger can provide 45W or more, it will charge your iPhone 17 Pro as fast as it can go. If you have an older iPhone, you don’t even need that much. The Apple charger is mildly interesting because they made a slightly smaller than usual one that displays a dynamic behavior where it boosts up to 60W. That’s it. (If you actually mean efficiency of energy deliv…

There was some speculation that chargers would need the AVS spec to full speed charge the new iPhones, rather than just any USB-PD. Has that been tested yet?

This post[0] seemed to be the main source of confusion, but it has since been updated at the bottom to apologize and say it wasn’t true.

You don’t need some kind of special charger.

[0]: https://9to5mac.com/2025/09/13/iphone-17-pro-fast-charging-p...

Re: Teardown of Apple 40W dynamic power adapter with 60W max

#75

Earlier quoted context omitted.

I am able to pinch to zoom fine on my iPhone

The issue seems to be with Chrome based browsers.

The website explicitly disables it; they have a viewport meta tag with:

    initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no
I think it's more likely Safari these days just ignores this, because of the very problem OP complained about.

Re: Teardown of Apple 40W dynamic power adapter with 60W max

#77

This is very cool, I might actually get one to charge my laptop. That being said... I can't be the only person who consciously avoids fast-charging my phone. My whole apartment is full of wireless charging pads intentionally plugged into weak chargers (wireless charging avoids putting wear on the USB port). 60 watts can't possibly be healthy for a battery small enough to fit into a phone.

You aren’t, but that concern is mostly superstition.

I work at a place with a huge phone fleet. We have interns study our telemetry and records because I kids like phones and they find ways to save us money. We allow for low friction replacements of phones at 12 months — the average replacement is ~27. The most common issues are cracked screens and excessive scratching on iPhone 16 and a Samsung I cannot recall. Batteries are only an issue for field devices subject to excessive cold or heat.

Unless you’re trying to keep the thing going 5 years, you’re likely seeing marginal benefits.

Re: Teardown of Apple 40W dynamic power adapter with 60W max

#80
post #67

Why do so many websites disable pinch-to-zoom for mobile users? This page is full of interesting close-up photos, but at least on my Android phone, I can't zoom in to see any of the details. Who benefits from disabling this feature?

That's something you can override in the accessibility options, both in Chrome and in Firefox.

IMHO, it should be the default, I have never been in a situation where it caused a problem, but I have been in plenty of situations where it helped.

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