ANKER: Amazon's #1 Charging Brand • The highest average review rating of any charging brand. • One in three chargers sold on Amazon is from us. • Join the 6 million+ satisfied customers powered by Anker. Anker® 2nd Generation Astro3 External Battery Recasting the possibilities of mobile power. PowerIQTM Detects your device. Delivers the fastest charge. Exclusive to Anker, PowerIQTM amp-adjustment technology intelligently identifies your device to deliver its fastest possible charge. Huge Capacity With a massive 12,800mAh, charge an iPhone 6 five times, a large capacity phone like the Galaxy S5 over three times or an iPad Air once. Superior Quality We use only premium LG cells, together with the most advanced materials and cutting-edge technology, to ensure complete safety. Ultra Compact The size of a small hipflask. Now upgraded with higher density cells and efficiency 10% above the industry average to put more power in the same, slim design. 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 tablets and some GPS and Bluetooth devices.