The OtterBox Wireless Power Bank for MagSafe doubles down on wireless charging. It clings magnetically to your iPhone while charging it, and the external battery also magnetically attaches to MagSafe chargers to receive power. And it can do both at the same time. There are versions with 3,000mAh and 5,000 mAh of capacity.
I tested the MagSafe accessory with my iPhone 13, and I’m pleased with how well it works.