OXA 2600mAh Portable Mini Stylish External Battery Power Bank with Key Chain for iPhone, Samsung, Nokia, Motorola, HTC, LG, Sony and other electronic devices(Black) Safety: Samsung Grade A cell and premium microchips ensure high quality Capacity: 2600 capacity in a small and lightweight body. Speed: Super-fast charge output (5V /1A)though one USB Durability: 500+ recharge cycles over the life of the battery. One charge could last one week for a regular user and that means almost 10 year recharging time. High efficiency of power conversion, charge all phones by USB port