Garadise Compact II 10400Mah External Battery Portable Charger Power Bank with Ics Technology. (2.1Amp Output,2Amp Input Fast Charging) for Smartphone, Tablets (Silver) Durable aluminum metallic case: same aluminum material as mac book laptop World class built in chip: ensure the safety, protection and efficiency Full charging speed: the built-in ics chip ensures every device get the maximal charging speed Large Capacity: fully charge the iPhone 5s 6 times, Samsung S5 4 times Simplicity design: everything is right where you need, power button, indicator lights