Naztech iPhone 6, 6s 2400 mAh MFi Apple Certified Portable Battery Charger Case- Retail Packaging - Black A Trusted American Brand Provides your Device with 120% extra battery life! Patent Pending Naztech intelliq technology delivers a personalized charging protocol to your Device to provide it with the most optimized charging experience possible. Built-in kickstand is available for easy hands-free viewing. LED battery indicators let you know how much battery power is remaining in your power case.