ANKER: The #1 Choice for USB Charging

- Faster and safer charging with our leading technology- 10 million+ happy users and counting2nd Generation Astro E3 Portable Charger External Battery Power BankPortable powerpack perfection.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 CapacityCharge an iPhone over four times, a large capacity phone like the Galaxy S5 two and a half times or most tablets at least once.Most CompactThe size and feel of a smartphone. The E3 is unobtrusive, lightweight and the most compact among batteries of this capacity.Premium PerformanceIndustry grade materials, premium circuitry and a battery 10% more efficient than the industry average ensure complete reliability.World Famous WarrantyAt 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 the new 12 inch MacBook, 2015 (USB-C cable needed) Apple and Android smartphones, tablets (including the Nexus 7) and other USB-charged devices except for the iPod nano, iPod Classic, HP TouchPad, Dell Venue 11 Pro, Asus tablets and some GPS and Bluetooth devices.
• Do not try to recharge the Astro E3 while it's charging a device, as this may reduce the battery's lifespan.