... CE&ROHS 2.With 17 years experience widely use for iphone,ipad, camera,MP4.pm3 1).Feture of the power bank 1. ... Operating Description4.1 Install the batteryPut the battery into the body of power pack with correct polarity as the indicate in the batterytrough ... O.S. implement by pressing the button and hold for 5 seconds. multi-function universal portable power bank for iphone,mobile phone,Ipad,MP3...