Besides looking slick in vibrant yellow, red, or blue, the Energi 2K acts it, serving two functions that haven’t been widely available in portable power devices so far: it’s an AC adapter for your iPhone, iPad, and other USB-powered devices, plus it’s an external battery that can power your phone on one charge (no full iPad yet). Best of all, you can charge your device and the Energi 2K’s battery simultaneously. Available midyear. $40; tylt.com
