And now, the one that I swear by – never leave the house without it – is down to its lowest price ever, courtesy of Amazon.

Nick Guy is a senior editor for Buy Side from WSJ. He's been reviewing personal technology, accessories and myriad other products for more than a decade. Staff Editor, Buy Side from WSJ Madeline ...

We have listed the speeds at which each portable power bank can be charged itself (Input charger) and charge the iPhone (Output charger). Some power banks can charge a phone faster if you connect ...

and the best portable charger for iPhone. The quick list Here's a quick overview of the best portable chargers you can buy right now based on our testing and reviews.

These portable chargers and power banks give you the most boost when you're out of juice. I’m a Mobile Analyst at PCMag, which means I cover wireless phones, plans, tablets, ereaders ...

I know exactly what to look for, and I'm just here to help you find the perfect portable charger for your next ... to get one or two full charges of an iPhone out of it at best.

Get 57% off this portable charger offering Apple Watch wireless charging and a built-in USB-C cord for smartphones.