ONTOP PowerStack Two-Pack Modular Charging System for iPhone 5 and iPod Sleek, stylish, and lightweight business-card-size 2500mAh capacity battery pack Apple MFI certified, Supports up to eight hours of charging time for Apple iPhone 5s Retractable LightningTM connector for cable-free charging connector Compatible with the iPhone 5, iPhone 5c, and iPhone 5s, iPod Touch (5th generation), and iPod Nano (7th generation) Stack n Charge charging pad charges up to three PowerStack battery packs at the same time PowerStack 2500mAh battery pack x 2, PowerStack charging pad x 1, Micro USB charging cable x 1