EZOPower Black 2 USB Port Compact External Portable Rechargeable Emergency Backup Battery Charger (5000mah) For Asus Google Nexus 7 inch Tablet, Sony Xperia Tablet S 9.4 inch, Acer Inconia Tab A510 / A700 / A710 Universal, convenient, portable, and compact external rechargable back-up battery. Compatible with most portable devices (Mobile Phones, Music Players, Portable Gaming Devices, Digital Readers, etc.) Charges via included USB cable + Includes interchangable charging tips such as mini USB, micro USB, and more for your convenience. 2 USB ports for Dual Charging, 5000mAh battery capacity, Output 1(S) & Output 2(I): USB ~ 5V 2A; Input: Micro-USB ~ 5V 1000mA Includes 1 year warranty.