Portable Power Bank
Having your phone die on you while you're in the middle of a new city is never ideal. You can no longer bring up GPS, you can't check what good restaurants are around, and you can't take photos with your camera. Make sure that never happens by packing a portable charger with you. The Satchi Travel Charger is smaller than a phone and has four powerful USB ports that are designed to charge Type-C laptops, tablets, and smartphones.

Dual Type-C PD Travel Charger, $69, Satechi