Apple introduced the iPhone 4, iPhone 4S handset designs stylish simplicity also has powerful features, excellent experience for the user, so impressive sales market. However, because of the iPhone are based on the design of the built-in battery, you can not use the iphone 5 battery case will have some impact on the day-to-day use of consumers do this, many manufacturers have introduced mobile power supply designed for the iPhone dedicated to provide more power support.