Anker: The #1 Choice for USB Charging

• The highest average review rating of any charging brand. 

• Join the 6 million+ satisfied customers powered by Anker. Anker 2nd Generation Astro Portable Charger External Battery Power Bank Powering over two million people to date. PowerIQ Detects your device. Delivers the fastest charge.Exclusive to Anker, PowerIQ amp-adjustment technology intelligently identifies your device to deliver its fastest possible charge up to 2 amps! Ultra-High Capacity Packed 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 Quality We use only the finest quality LG cells, together with the most advanced materials and cutting-edge technology, to ensure complete safety. Ultra Compact As small as a candy bar. Now upgraded with higher density cells and efficiency 10% above most other brands to give you 6% more power.  World Famous Warranty At Anker, we believe in our products. That's why we back them all with an 18-month warranty and provide friendly, easy-to-reach support. 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.