ZILU Smart Power 13000mAh Portable Charger External Battery Pack Backup Power Bank Dual USB for iPhone, iPad, Samsung and more, Retail Package, Pink High quality---Samsung Battery Cells Inside, Samsung Grade A 18650 battery cells. It passed the most strict safety certification, UL 1624. Safety is the first priority for battery products. High efficiency--- Advanced Battery Management Technology - Texas Instrument IC module bring 10% more efficiently than the market average product. With 3A output and 2A input, the charging speed is 50% faster than most battery packs on the market. Easy to carry --- It is not just a product. It is a companion that you will use every day. The product is so much compact designed that it could be very easy to hold and put anywhere you want, e.g. a bag or even a pocket. Safety---360 Protection for Customers - ZiLu Technology used the best battery cells and best management IC in the world. We proudly claim 1000 charge/discharge cycles of the battery products. Thus we offer 2 year warrantee. Compatibility and Package Content - ZiLu Smart Battery Pack is compatible with most of the smart phones and 5V tablet in the market. It can charge most smart phones and tablet in the market.