Tenergy 13,000mAh Jumbo Dual Port External Backup Battery/Power Bank Extremely High Capacity - Li-Ion 13000mAh Battery Double USB Outputs - charge a Smart Phone & a Tablet (or any two devices with 5V input) at once. Perfect for business, family trips, traveling, long flights, or whenever you need to charge your mobile devices on the go. Compatible with all Smart Phones, Tablets and mobile devices that charges with a USB cable. Easier Portability - No Bulky Power Adapters required