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The best compact portable charger / external batteries for your iPhone that we’ve found, and the only ones we ever use, are the Anker PowerCore 5000 and Anker PowerCore+ Mini. You may have a brand-new phone or a brand-new battery, but making your Instagram stories, taking video, and running Bluetooth, GPS, and Strava can drain your battery faster than you’re accustomed to. Slip this this portable, lipstick-sized external iPhone battery into your pocket or day pack, and you’ll never get stuck not being able to call an Uber or pull of the directions to your hotel. Either model is compact and reliable; we’ve found the performance of both to be outstanding. And for the low price of $19.99, they are cost-effective and necessary travel tools. In fact, I’ve started bringing two on every trip, just in case.

Each comes with a micro USB to USB-A charging cable and will fully charge in 4-5 hours. (Hint: you can charge your smartphone AND your Anker portable charger with this handy all-in-one universal power adapter.) You supply your own lightening cable for Apple devices, or your own USB-C cable for Google Pixel or Samsung Galaxy models.

To compare the two compact batteries:

The Anker PowerCore 5000:

  • measures 4.2″ x 1.3″ x 1.3″
  • weights 4.8 oz
  • Fully charges iPhone 6 twice or Galaxy S7 once
  • in addition to black you can choose from royal blue, red, and white

The Anker PowerCore+ Mini:

  • measures 3.7″ x 0.9″ x 0.9″
  • weighs 2.8 oz
  • Fully charges your iPhone 8 or charges 80% of Samsung S6
  • in addition to black you can choose from cerulean blue, baby pink, and gold

We highly recommend this device. When you’re not traveling, will keep one handy in your car or bag at home.