GNRF iPhone ultra-thin power pack is the word thinnest and most convenient backup battery pack ,with the capacity of 1800-3000mAh to charge your iPhone whenever and wherever and extend the battery  time by doubling its charging capacity. By using the imported materials, and cooperate with the famous manufacture like Foxconn ,the products are of superior quality .With decent and fashionable appearance ,superior quality and competitive price ,our products have become popular in the global market .