Are you looking for a reliable power bank for your iPhone? CNET recommends considering devices that are compatible with the emerging Qi2 standard. Currently, most baseline power banks start at a 5,000-mAh capacity, which provides at least one full charge for an iPhone. Anker's PowerCore Fusion and PowerCore III 10K, as well as Mophie's Snap Plus Juice Pack Mini, are top-rated options that offer fast charging speeds, multiple USB ports, and wireless charging capabilities.

Source: https://www.cnet.com/tech/mobile/best-power-bank-for-iphone/#ftag=CAD590a51e