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David Carnoy/CNET






Mophie's magnetic power bank is similar to Anker's but has a more refined design. Like the Anker, this portable charger isn't an official Apple MagSafe accessory, but it magnetically adheres to the back of your iPhone 12 or MagSafe case -- yes, it sticks nicely -- and is svelte for a 5,000-mAh battery. It can also be used with other phones that support wireless charging and comes with a stick-on magnet. 

For wireless charging, Mophie says you're looking at up to 7.5W for iPhones, but it felt a little more sluggish to me (more like 5W). If you need a faster charge, you can connect a USB-C-to-Lightning cable to bump the speed up to 12W. This has enough juice to fully charge an iPhone 12 or 12 Pro once but it'll fall a little short of a full charge with an iPhone 12 Max Pro. Note that this is not compatible with the iPhone 13 Pro.






























What to look for

Here are a few things to keep in mind when shopping for an external battery pack or power bank:


A higher power output rating (mAh, short for milliamp hours) means more charges -- but also a heavier portable charger weight. 

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. With the exception of the Atom XS, all of the models featured above hit that mark. 

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.

These best portable chargers for iPhone all use lithium-ion rechargeable batteries, and should thus always be stored in carry-on luggage when flying. Airlines and regulatory agencies are increasingly banning li-ion batteries in checked baggage.

If you want maximum power output, opt for chargers with USB-C PD (power delivery) models, which should charge nearly every device smaller than a laptop, such as a tablet or Nintendo Switch.


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