Here is a list of power banks that stick behind the iPhone 15 and iPhone 15 Pro using MagSafe magnets. All these power banks feature USB-C.
BENKS Magnetic Power Bank, Upgraded 10000mAh Wireless Portable Charger, for MagSafe Battery Pack with Two-Way 20W USB-C Ports, for iPhone 15/14/13/12 Series, Blue - Yahoo Shopping
MagSafe Power Banks for iPhone 15 and 15 Pro with USB-C Port
iPhone 15 Pro Max MagSafe Clear Case – Cygnett
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iPhone 15 Pro Max MagSafe Case – Cygnett
BENKS Magnetic Power Bank, Upgraded 10000mAh Wireless Portable Charger, for MagSafe Battery Pack with Two-Way 20W USB-C Ports, for iPhone 15/14/13/12 Series, Blue - Yahoo Shopping
Anker Nano USB-C Power Bank is perfect for iPhone 15
iPhone 15-Ready: Choosing the Perfect MagSafe Power Bank - Chargerlab
Baseus Magnetic iPhone 15 Power Bank 30W 10000mAh With Built-in USB-C Cable
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MagSafe Power Banks for iPhone 15 and 15 Pro with USB-C Port
Best MagSafe battery packs 2024: Expert tested and reviewed
1000000mAh Mag Safe Wireless Power Bank for iPhone 15 14 13 Pro Max Battery Pack