Was in the market for a new external battery pack and found this. According to camelcamel this is the cheapest price yet so I went for it. Review seem pretty good.
Monster capacity (15000mAh) charges the iPhone almost 7 times, large-capacity phones like the Galaxy S4 4 times or almost a full charge to an iPad 3 / 4. In terms of power, this is the biggest, baddest battery in the Anker® mobile line.
Super-fast charge output (5V / 3A total) through dual USB ports (5V / 2A and 5V / 1A) allow for simultaneous charging of your iPad, iPhone, Android, and more at high speed.
Smooth, ebony varnish allows you to power up in style, while 4 status LEDs keep you informed of remaining capacity. Built-in flashlight for dark or low-light environments.
Ultra-high density battery cells make this the world's most compact 15000mAh external battery. Use a 5V / 1.5A adapter (not included) for fastest charging (9-10 hours).
Package contents: Anker® Astro E5 External Battery, Micro USB cable, travel pouch, instruction manual.