Dynex Lithium Ion Portable Battery Charger - Sapphire Compatible with most devices with a micro USB charging port for wide-ranging use. 2200 mAh capacity lets you recharge your device, so you can talk, text and surf longer when you're out and about. Aluminum housing provides durable protection. Dual-LED indicator keeps you apprised of the battery's status. 19.7" micro USB cable provides flexible placement options.