Conbini Japan

ANKER Astro M3 dual usb portable backup charger for smartphones and other usb devices. Includes a led light (if you don't charge any devices with full battery last 480h). With this battery pack you can charge your iPhone4 to seven times and a Galaxy S4 thrice.

Size: 147x62x22mm
Capacity: 13000mAh
Input: 5V / 1.5A
Output: DC5V/2.1A + 5V/1A (2 USB Ports)
Includes japanese power adapter and microusb cable. Charging times: 9 Hours

Note: Some smartphones made before 2011 will not let you use the 2.1A charging port, use the 1A port for them.