A power bank that has a built-in USB-C cable so you don’t have to carry one of those around, too. The Anker Zolo is that power bank—and it’s on sale for $12.94 on Amazon with Prime.

The OnePlus Slim Magnetic Power Bank is 0.88cm thick, 9.6cm long, 6.9cm wide, and weighs only 120 grams. It features USB Type-C and wireless charging, supporting MagSafe for charging two iPhones ...

The power bank features a four-port setup, including two built-in USB-C cables. One of them supports bidirectional charging (up to 45W), so you can both charge and recharge through the same cable.