Lepow&reg; Simplicity Series 7800mAh Portable External Battery Pack with 2.1A Output, Lithium Ion Battery, Wrap around integrated Micro USB Cable and LED Battery Indicator - Innovative, Fast Charge and Compatible with iPhone, Samsung and Other USB Charged Devices - White Integrated micro USB cable for convenient and thin, portable and ergonomic design with rounded corners High grade LG original battery inside,Light for a 7800mAh capacity and easily slips into a backpack or bag for daily use Light for a 7800mAh capacity and easily slips into a backpack or bag for daily use Has a 90% conversion rate, while the average is usually around 70-80%, and continuously charges the iPhone 5/5s 4times and Samsung S4 2.5times 12-month warranty.