With trend of smartphone developing speedily all around the world,complicated APP being used in mobile phone are necessary of more energy, the phone screen gets bigger also,it means the consumer have begun to worry about whether the battery is enough to support their mobile phone, especially the business man highly concerned about it. So, our company can supply different kind of power banks to support any style of applicable devices, such as SmartPhones,PSP,IPOD,iPhone,iPad,MP4,PMP,GPS Camera etc.