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Short answer: Yes, any USB-C charger works. But they don't all charge at the same speed.
What charges fastest:
For maximum speed, you want a 40W+ USB-C Power Delivery charger. Apple's 40W Dynamic Power Adapter is designed for it. Third-party chargers from Anker, Belkin, and similar brands work equally well.
With the right charger: 50% in about 20 minutes. Full charge in around 85-90 minutes.
What still works:
Your old 20W Apple charger? Works, just slower. That 5W charger? Works too, but slow.
MacBook chargers work great. 30W to 140W. The phone takes what it needs.
Cable matters:
Use Apple's included cable or a quality PD 3.2 cable. Cheap cables may limit speed.
Wireless charging:
MagSafe and Qi2: 25W. Standard Qi: 7.5W.
What doesn't work as advertised:
Samsung Super Fast Charging, OnePlus SUPERVOOC, and other proprietary standards fall back to standard PD speeds. iPhone only speaks USB-C Power Delivery.
Safety:
Can't overcharge with a too-powerful charger. The iPhone regulates its own intake.
Where this comes from: This answer is based on ShopSavvy's product database, real-time pricing from thousands of retailers, and a look at hundreds of user reviews to give you a well-rounded picture.
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