Poweradd Smile 5000mAh Portable Charger External Battery Power Bank with Auto Detect Technology for iPhone, Samsung Galaxy, HTC, Motorola, Sony, Blackberry, Nokia and More(Apple Adapters Not Included) Auto detect technology, auto detect each devices to provide the fastest possible charging speed. Unique display design, three unique battery level display: smile face,sad face and red eye, vivid tell you the battery juice have got left. More powerful, enable Charging speed of up to 2.1A(max) when charging one device or two devices at the same time. Safer and reliable, constructed with A+Lithium Polymer battery cells ensure the safety in use and charging and discharging efficiency. Industry-Leading Warranty: 24-MONTH warranty and 24*7 customer service