iOS 8.1.3 & iOS 8 compatible and iOS 7 and iOS 7.1.2 compatible for iPhone 5s iPhone 5 External Battery Charger Power Bank in ultra-compact, sleek design of iPhone 5S iPhone 5 with integrated 2.200mAh POWER Battery Pack Battery Case Cover spare battery PowerPack Cover - Black (Electronics) 5
iOS 8.1.3 & iOS 8 compatible and iOS 7 and iOS 7.1.2 compatible for iPhone 5s iPhone 5 External Battery Charger Power Bank in ultra-compact, sleek design of iPhone 5S iPhone 5 with integrated 2.200mAh POWER Battery Pack Battery Case Cover spare battery PowerPack Cover - Black (Electronics)
One in my eyes pretty neat idea because it allows me to my iPhone and then recharge, if I'm not near a power outlet. This one is much more flexible. In use, it is also very easy to understand and convenient to use