1.Convenient to change battery when you go out. 2.Its design is stylish ,small and exquisite, portable,fashionable and elegant New arrival 3600mAh portable charger power bank for iphone Features:1. Power bank for phone, Mp4, digital devices, etc.2. Built-in protecting circuit against over-current, over-heat and over-voltage, can ensure security.3. Portable power supply, easy to carry4. ...