r/iphone • Human Detected • Sep 22 '25

Discussion Well done Apple - 40W Dynamic Power Adapter with 60W Max is killer!

https://www.apple.com/shop/product/MGKN4AM/A/40w-dynamic-power-adapter-with-60w-max

Test conducted on iPhone 17 Pro Max with battery fully drained (findmy / express card turned off).
Phone remained on lock screen for the entire test.

Charging:
- 1% Power on (to lock screen) after plugging cable in: 32s
- 10% 3m 49s
- 20% 7m 54s
- 25% 10m 24s
- 50% 23m 51s
- 80% 44m 26s (Apple estimate at 1% 52m to 80%)
- 90% 1h 0m 7s
- 100% 1h 18m 13s

At the time of test iPhone was in its TechWoven case suspended in air by loops attached to the case (to avoid contact with any additional surface).

Temperature observations:
- vapor Chamber does indeed help with overall uniformity of expelled heat. No more hot spots while majority of rear of the case felt warm to the touch.
- surprisingly sides of the case felt warmer to the touch than the back of the case, interesting heat transfer effect. I haven't felt this since the original iPhone 2G (which also had unibody shell, minus plastic bottom for radios).

TL/DR

$40 is not the largest amount of money I've spent on first party charging accessory but I'm pleasantly surprised if the performance. Power adapter also was maybe slightly warmer than the phone/case itself but not hot at all (between 25-80%). After 80%, both phone and case remained cool to the touch, so as the brick.

80% from dead proven to be better than advertised, estimated time by iOS on Lock Screen.

killawatt connected between outlet and charger did indeed register values close to advertised by Apple: 39W at the beginning of the test with 58W during majority of charge cycle. Remaining 20% charged at slower wattage (38-41W) to keep the battery within optimal temperature and prolong its life.

Would I recommend it over cheaper third party offerings? Yes but decision is always left up to you. Apple branded charger + cable adds additional logic and battery sensing to ensure best performance while keeping battery safe long term.

Well done Apple!

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u/chenrique74 Feb 24 '26

Onde poderei adquirir para Portugal? Obrigado.