Tmvel 5000mAh Dual Port Portable External Battery Charger Pack Power Bank Built-In Micro-USB Cable for Smartphone, Tablets - Retail Packaging - Green Capacity: 5000mAh, Li-polymer, Charges iPhone 2 to 2.5 times, Charges Galaxy S4 about 1.3 times. Compact, portable & stylish design; Together with the included travel pouch, it's perfect for long plane flights, road trips. With internal protection functions for short circuit, overcharge and over temperature, safe, energy-saving and environmentally friendly.