Nitecore’s NPB4 is a compact & powerful power bank that is also fully submersible/waterproof. Small enough to fit in your pocket, it is designed to perform in extreme conditions. It boasts an IP68 rating & can be submerged for 30-minutes. Powered by Li-Ion batteries, it features dual USB-A & USB-C output with enough power to charge your iPhone 12 six times. Airline approved for carry-on.