To charge the iAUDIO 9+ the player should be connected to either a PC or a charger using the supplied USB cable. 1. Connect between PC and USB/EXT port using the USB cable : The battery will be fully charged in about 2 hours. 2. Charging by COWON approved AC adapter : The battery will be fully charged in about 2 hours. * When charging the player for the first time or the player has not been charged for an extended time, fully charge the battery before use.