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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

#211

Post by lxgr »

coder543 wrote: post #167
lxgr wrote: post #166

Earlier quoted context omitted.

I don't have access to, nor a need for, the 40W charger, yet I'll continue speculating about it (which is why I prefixed my comments with "I could see", "it could", and "I suspect"), thank you very much. Mainly, I'm trying to understand why AVS is supported by both the phone and the adapter if supposedly it makes effectively no difference. It could be as simple as being a requirement for PD 3.2 wall adapters, of cour…

There is nothing to speculate about here, other than to create confusion for others. The physics is immensely clear. AVS is not needed here, and OP can save money by buying whatever is the cheapest option that provides >40W. Since I have shown through basic math that it isn’t related to the ability to charge the phone any faster, that possibility is obviously eliminated. AVS is likely supported because there’s no rea…

Sorry, I wasn't aware this was a tech purchasing recommendation site instead of a discussion forum for hackers ;)

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

#212

Post by l8rlump »

comice wrote: post #197
jstrieb wrote: post #172

Earlier quoted context omitted.

I'll let the right people know, thanks to you and the YouTube commenter! What a funny, positive way to point out our error.

The right and left people should probably work together in future ;)

Might be a lesson for us all.

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

#213

Post by l8rlump »

londons_explore wrote: post #191
quickthrowman wrote: post #184

Earlier quoted context omitted.

Gotcha, there are still locations where non-GFCI receptacles are allowed in residential homes in the US, they’re required in basements, garages, exteriors, and within a certain distance of a sink/plumbing tap but not in bedrooms or general ‘living space’. AFCIs are required in most areas but don’t protect against ground faults, which aren’t as concerning with a device that is injection molded plastic anyways. The tri…

In the last 4 years china has really cracked down on dangerous products, so anything newly made will generally have at least the basics of protections. For example all products with batteries have over and under voltage protection with a dedicated chip rather than some microcontroller hopefully stopping the charge at the right time as used to be done in 2018 to save a few cents.

Diodegonewild might disagree with you.

https://youtube.com/playlist?list=PLfUGOPyKWwiriWhjmdtvjBw_J...

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

#214

Post by quickthrowman »

Animats wrote: post #199
quickthrowman wrote: post #127

Earlier quoted context omitted.

Please do not save money by using unlisted electrical equipment. Spend the extra $20 for a product that is tested and listed by UL/CE/ETL, it’s not worth burning a building down over $20. You couldn’t pay me enough money to plug this into a building’s electrical distribution system, it’s drawing ~3A at 120V (60W at 5V plus inefficiency) and in a very small form factor, I sure hope the engineering and QA of that $5 ch…

Not seeing UL or ETL or FCC certification on those Apple A3365 chargers. Not finding Apple's own Declaration of Conformity for that product.[1] Anyone know the switching frequency? [1] https://regulatoryinfo.apple.com/en/eurocompliance

You can see the UL logo on the label of the charger on the first picture on the product page. I have no idea about the EU version, I live in the United States.

https://www.apple.com/shop/product/MGKN4AM/A/40w-dynamic-pow...

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

#215

Post by tacosalsa »

LorenDB wrote: post #42

I wonder what temperature this thing hits. I have an even smaller 65 W GAN charger[0] that gets pretty toasty under load. I can't really see Apple wanting to ship a toasty charger, though. [0]: https://rollingsquare.com/products/supertiny-the-smallest-65...

Wow, that's really small. Only 43 cm3 (without the plug) for the EU version. I own an a Anker Nano II 65W GaN Charger and that's already small with 64 cm3. I can imagine that Rolling Square one getting even hotter with that low amount of material, and thus cooling.

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

#216

Post by ryukoposting »

Spooky23 wrote: post #77
ryukoposting wrote: post #34

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. Batt…

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

My last phone went for 6 years, and the only reason I replaced it is because one of my banking apps dropped support for Android 8.

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

#217

Post by seec »

Reason077 wrote: post #209
londons_explore wrote: post #162

Earlier quoted context omitted.

I think aliexpress A/B test prices. Clear cookies and refresh a few times and you'll get the $5.50 price.

AliExpress offers lower (subsidised) prices for first-time customers. So you often see very low prices when casually browsing, but when you log in with an existing account, the price goes up. When shipping to my country they also don't add sales tax / VAT until the final confirmation page, which is illegal.

Yep. AliExpress things, it is rarely as much of a good deal as it first appears. I have been burned many times. For things that you don't care about or don't need to rely on it's fine but there is too much fuckery going on to trust it for anything of importance.

That being said, Amazon isn't much better nowadays and I have been pleasantly surprised by some items from AliExpress. However one should not expect western quality standard for most things...

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

#218

Post by londons_explore »

seec wrote: post #217
Reason077 wrote: post #209

Earlier quoted context omitted.

AliExpress offers lower (subsidised) prices for first-time customers. So you often see very low prices when casually browsing, but when you log in with an existing account, the price goes up. When shipping to my country they also don't add sales tax / VAT until the final confirmation page, which is illegal.

Yep. AliExpress things, it is rarely as much of a good deal as it first appears. I have been burned many times. For things that you don't care about or don't need to rely on it's fine but there is too much fuckery going on to trust it for anything of importance. That being said, Amazon isn't much better nowadays and I have been pleasantly surprised by some items from AliExpress. However one should not expect western…

Oddly I find the reverse. They apply random coupons only at the final checkout stage and I often end up paying only half for the items I'm buying, especially if I order many items.

I seem to get the 'delayed delivery' coupon every time even if the delivery is on time for example, and sometimes that coupon is worth more than the item itself for low value items.

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

#219

Post by red369 »

red369 wrote: post #111
SomaticPirate wrote: post #47

Earlier quoted context omitted.

I believe current battery technology is optimized for fast charging. You are incurring damage every time your battery goes below 20% or exceeds 80% (see current EV charging recommendations). Even LinusTechTips did a video that showed the length of charging doing more damage than fast charging. For the concern about thermal damage, most phones will throttle their charge if they become too warm. Personally, I feel my w…

Thanks for bringing up that LinusTechsTips video - I'll try and track it down. I would not have expected that conclusion. I've already said in another comment on this thread that I'd expect the opposite!

This seems like the video that the GP post was referring to: https://www.youtube.com/watch?v=AF2O4l1JprI

Linus is surprised that fast charging does not heat the battery as much as expected.

I interpreted that "length of charging doing more damage than fast charging" meant that slow charging was worse, because the battery spends more time charging, but I don't think this is stated in the video. In the video, Linus confirms that it is the high state of charge that does the damage and that trying to keep the state of charge as close to 50ish % is best. The conclusion that fast charging is better for the battery, is because you are more likely to do it when awake, and can stop the charging once it reaches whatever percentage you require (but the damage really starts to increase above 80%.

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

#220

Post by Schnitz »

rr808 wrote: post #72
Schnitz wrote: post #64

Earlier quoted context omitted.

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.

Yes but if after 1 year I’m at 100% battery health then isn’t it reasonable to assume that what I’m doing isn’t significantly harming my battery and I can continue like this for several more years? On previous iPhones where I didn’t use the 80% charge limit battery health dropped mostly linearly over the 3-5 years that I had the phone.
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