Diageng &reg; 15000mah Power Supply External Battery Pack Backup Portable Charger Universal USB Travel Power Bank for Smart Phones,Tablets and Other Digital Services that uses a USB cable-Yellow 15000mAh external battery backup, 500 + recharge cycles over the life of the battery. Portable ,small, convenient to carry, charge your mobile phone wherever you go. Good assistant, no more worry about your business trip/traveling etc. Charges POWER BANK via the included Micro-USB cable. Double USB output, charging two devices at the same time,LED indication for Battery Status