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^ had it right. And again right in post #9 - you could plug your phone into a 10,000 watt charger and it would only draw 20-23w. The charger is actually in the phone, the power brick is just supplying power to the device.
I think the current regulator is in the phone, the charger is still the charger
 
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it charged from 28% to 80% in minutes. Like maybe 17 minutes?

I’m using 30 W pd charger

Let somebody else chime in. But 17 mins sounds less from 28% to 80%. Maybe somebody with an 11 Pro can tell you how long theirs takes.

With the 18W charger the 11 Pro does 0 to 55% in 30 mins. That’s nearly 2% a min.

But if the 30W charger is that much faster, maybe. Dunno. But then we should have heard more about this from Apple.
 
Let somebody else chime in. But 17 mins sounds less from 28% to 80%. Maybe somebody with an 11 Pro can tell you how long theirs takes.

With the 18W charger the 11 Pro does 0 to 55% in 30 mins. That’s nearly 2% a min.

But if the 30W charger is that much faster, maybe. Dunno. But then we should have heard more about this from Apple.

my battery drains really fast though.

I’m using 5G on att
 
my battery drains really fast though.

I’m using 5G on att

That’s not 5G dude. That’s AT&T’s marketing. No iPhone yet supports 5G. It’s called 5Ge I think. Just super fast LTE-A.
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And can you elaborate what you mean when you say it drains really fast?
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If you’re coming from a X/XS, you should really get 2x the battery life I guess. Is that not the case(
 
Test mentioned in my post above was from Inviolabs, because it measured watts real time (as well as charge time vs. %). It was on an iPhone 11. There are other tests like what you found, including tests on earlier fast charge capable iPhones....all show essentially the same result as the data you posted re. 18W vs. 30w+.

The Inviolabs (iPhone 11) test resulted in (30W/18W PD)...30 min. 55%/53%, 1 hr. 84%/80%, and both reaching 100% within a minute of each other. Insignificant difference, certainly would not justify carrying bigger heavier charger just for the phone, or worse yet buying one.

And, yes, the good old low tech. relatively small and light 12W iPad charger is a gigantic improvement over the 5W. And does nearly as well as 18w/30w PD chargers. I‘ve been using on iPhone for years, when I needed a fast charge.

The thing that surprises me is that the rather old and unsophisticated 12W iPad charger comes so close to the smart PD chargers with their variable voltage and current rates.
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Is the 2017 MacBook 12” 30W charger PD?

The older 29W charger probably is PD, but it doesn't support the full PD charging scheme. IIRC, the current (pardon the pun) PD scheme provides charging at three voltage levels: ~5V, ~9V and ~14V. The 29W adapter provides only 5V and 14V.
 
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I think the current regulator is in the phone, the charger is still the charger
The plug in wall portion is named “Power Adapter” for reason. It is not a charger, never has been. It adapts (transforms) 110-240V 50-60 Hz AC to various DC voltages at particular Amps as noted on each adapter based on the secondary windings. With one of these (Induced) DC V x Amps combinations equaling the Max wattage adapter is name after. In case of 30 Watt power adapter it is NOT 30 watts to an iPhone.

The charger or charging circuit is built into the iPhone/iPad/Mac. Each device will accept the particular voltage/wattage it was designed for, reducing the amps in stages going to battery as the battery approaches closer to 100%.
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There is not a proportional relationship between watts input and increase in charge percent. And it changes depending the battery charge %. Test I saw on iPhone 11 30W charger stated at 22W, then dropped to 15W at 20 min (40%), to 10w at 35 min (65%), and so on.
Never stated or meant to imply it was a proportional reduction. It is stepped. Point was that at lower battery levels more current is allowed to go to the battery based on the devices charging circuit.
 
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As a side note, Anker recently introduced a well-spec'd 18W charger that is essentially the same size as the old Apple 5W adapter. No folding pins, but the Apple 18W doesn't have folding pins, either.
 
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The thing that surprises me is that the rather old and unsophisticated 12W iPad charger comes so close to the smart PD chargers with their variable voltage and current rates.

Don‘t be surprised. 12W is a very fast charge on a little iPhone battery. iPhone gradually cranks down watts accepted after ca. 80% (at same 5 volts).

USB PD is at 3.0 now. PD 1.0 came out at time of iPhone 5, 2012. This was 2 yrs before USB C spec.

PD allows different voltage applied. Current PD spec allows 4 voltages. 5, 9, 15, 20V. . Apple 18 w charger offers (to phone) 5 and. 9V. Apple 30w offerers 5, 9, 15 V. iPhone will accept only 5 and 9V.
 
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Don‘t be surprised. 12W is a very fast charge on a little iPhone battery. iPhone gradually cranks down watts accepted after ca. 80% (at same 5 volts).

USB PD is at 3.0 now. PD 1.0 came out at time of iPhone 5, 2012. This was 2 yrs before USB C spec.

PD allows different voltage applied. Current PD spec allows 4 voltages. 5, 9, 15, 20V. . Apple 18 w charger offers (to phone) 5 and. 9V. Apple 30w offerers 5.9, 15 V. iPhone will accept only 5 and 9V.

I think I remember reading that the 30W differed from the 29W adapter in offering also 9V - are you sure? (I also seem to remember that Apple hadn't published detailed specs for either of them - but I need to google that, I haven't looked at that since the 30W replaced the 29W and that was at least a year ago.)
 
Apple’s 30W offers 5, 9, and 15 V. 29W has 5 and 14.5 V. (18W has 5 and 9V)

A test I saw (iPhone 11 Pro Max), the phone accepted 14.5V from the 29W. But in same testing on the 30W, the phone did not accept 15V, it started at 9V.

Except for the 29W, which does not offer 9V, the phone accepted a max. of 9V on all the tested chargers, despite many of them offering 15V and/or 20V options also.

In that testing, they commented that the 29W heated the phone up noticeably more than Apple‘s 18W, 30W, 61W, 87W; as well as the several other 3rd party PD chargers tested, all of which used max. 9V.
 
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Apple’s 30W offers 5, 9, and 15 V. 29W has 5 and 14.5 V. (18W has 5 and 9V)

A test I saw (iPhone 11 Pro Max), the phone accepted 14.5V from the 29W. But in same testing on the 30W, the phone did not accept 15V, it started at 9V.

Except for the 29W, which does not offer 9V, the phone accepted a max. of 9V on all the tested chargers, despite many of them offering 15V and/or 20V options also.

In that testing, they commented that the 29W heated the phone up noticeably more than Apple‘s 18W, 30W, 61W, 87W; as well as the several other 3rd party PD chargers tested, all of which used max. 9V.

Do you happen to have that link for the test handy? I would love to read it. Thanks! How interesting on the 14.5V input. Wowie.

I've recorded (via coconutBattery) the capacity on my iPhone batteries since my 6+ days. (I've had 6+, 6s+, 8+, Xs Max, and now 11 Pro Max). I usually keep my phones near 100% charge. I've found that this prolongs the battery life due to trickle charging vs the high energy <=80% charging rates. I think batteries these days just handle the high rate charging and near 100% a lot better than they used to.

Almost all of my phones have ended a near 2 year life cycle within a few % of the capacity they started out at.

Isidor Buchmann's book is most interesting (Batteries in a Portable World) - mentions that sometimes the rapid charging can restore some li-ion capacity.


Edit: A little bit of internet searching: https://www.inviolabs.com/blogs/news/iphone-11-charging-test-which-usb-pd-charger-is-better


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I think batteries these days just handle the high rate charging and near 100% a lot better than they used to.

Excellent google-fu and thanks. On the quoted text, that may be right, but I also think that charge controllers and the related software are *much* better than 10 years ago, maybe even than five years ago.
 
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Do you happen to have that link for the test handy? I would love to read it. Thanks! How interesting on the 14.5V input. Wowie.

The test I was talking about in last post re 29w vs. 30W chargers and the 14.5V ”anomaly” of the 29w Apple charger is:

http://www.chargerlab.com/iphone-11-pro-max-charging-test/

Perhaps this is at least part of why why Apple quietly dropped the 29W and replaced with 30W which offered 9v (?).

The Iviolab Test you added to your post was one I had seen in earlier post this thread (when advising there is no significant improvement 30w (or 29w) vs. 18w charger). newellj posted another test that also clearly demonstrated the same conclusion.
 
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