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✅ iPhone 15 Pro Max supports USB-C charging.
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✅ A 35W USB-C power adapter is fully compatible and allows fast charging (up to 27W).
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✅ Use a USB-C to USB-C cable that supports USB Power Delivery (PD).
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⚡ Charges ~50% in about 30 minutes.
You're all set with this setup for fast and efficient charging.