![]() ![]() Airlines and regulatory agencies are increasingly banning li-ion batteries in checked baggage. These best portable chargers for iPhone all use lithium-ion rechargeable batteries, and should thus always be stored in carry-on luggage when flying.Multiple integrated charge cables or USB-out ports will allow you to charge more than one device at a time, such as an iPad or another iPhone.With the exception of the Atom XS, all of the models featured above hit that mark. For the latest iPhones (everything after the iPhone 7) you should buy a battery with at least a 3,000-mAh capacity, which should give you at least one full charge for a device.A higher power output rating (mAh, short for milliamp hours) means more charges - but also a heavier portable charger weight. ![]() ![]() Here are a few things to keep in mind when shopping for an external battery pack or power bank:
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