BoxWave Dual Micro High Current Amazon Kindle Fire HDX 7.0 Car Charger - Universal 2-Port, Dual USB Car Charger for Amazon Kindle Fire HDX 7.0 (2.1 Amps - Black) Quickly and safely charges up to two power hungry devices simultaneously Small and compact in size with a sleek appearance Safely rapid charge your device; Intelligent chip design prevents overcharging Compatible with iPads, iPhones, Samsung Galaxy devices, MP3 players, and most smartphones and tablets 2.1A version: Input: 12V; Output: 5V at Total 2.1 Amps or 10W, shared between 2 ports; 3.1A version: Input 9V; Output: 3.1Amps