ANKER: The #1 Choice for USB ChargingAnker 2nd Generation Astro Portable Charger ​External Battery Power BankPowering over two million people to date.PowerIQDetects your device. Delivers the fastest charge.Exclusive to Anker, PowerIQ amp-adjustment technology intelligently identifies your device to

ANKER: The #1 Choice for USB ChargingAnker 2nd Generation Astro Portable Charger ​External Battery Power BankPowering over two million people to date.PowerIQDetects your device. Delivers the fastest charge.Exclusive to Anker, PowerIQ amp-adjustment technology intelligently identifies your device to deliver its fastest possible charge.Ultra-High Capacity 6400 mAhPacked with power, charge an iPhone 5s three times, a large capacity phone like the Galaxy S5 over one and a half times or an iPad mini once.Superior QualityWe use only the finest quality LG cells, together with the most advanced materials and cutting-edge technology, to ensure complete safety.Ultra CompactAs small as a candy bar. Now upgraded with higher density cells and efficiency 10% above most other brands to give you 6% more power. For Optimal Use:• Use the included cable, your original cable or a third-party certified one (such as MFi).• Compatible with Apple and Android smartphones, tablets (including the Nexus 7) and other USB-charged devices except for the iPod nano, iPod Classic, HP TouchPad, LG G2, Asus and some GPS and Bluetooth devices.