Fremo 11000mAh High Capacity External Travel Battery Pack Power Bank Charger Dual USB Charger - Retail Packaging - White Dual USB Charge & Easy Charge, the dual-USB outputs can charge two devices at one time. Built-in security protection design for short-circuit and over-current protection makes the battery safe and reliable. A-Grade Li-ion cell and premium microchips create high-quality portable charge Perfect for long travels, charges the iPad Air once, the Galaxy S5 over three times, the iPhone 5s almost six times and other smartphones multiple times. 18-month warranty and friendly customer service.