New Delhi, Sept. 23 -- A power bank can be useful when an iPhone has to get through a long workday, a flight or a day of travel without access to a wall socket. But capacity is only one part of the equation. Charging speed, USB-C support, wireless charging, size and even the convenience of having a built-in cable can make a big difference. The seven models in this list take different approaches. Some focus on high-speed wired charging, while others are designed around magnetic wireless charging for iPhones. Capacities also range from compact everyday options to 20000 mAh models designed for extended use. We have compared their key specifications and separated those features from the customer feedback provided on their Amazon listings.

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