... CMaintenance:In order to stimulate all potential energy of device,please make sure do followings:1, ... cell grade A and do full inspection of raw material 100%,To be strict to ... control product quality,for every proceeding of production,we have to do inspection many ... 2:Connecting with product by USB 2.0 cable,Then insert the USB charging adapter AC110-220V power outlet. USB 2.0 Power bank for iphone 4 ...