This convenient and robust radio runs off any 14.4V -18V Hitachi Lithium Ion slide-type battery (sold separately) or 120V mains with included AC cable. The UR18DSALP4 has many great features that include Bluetooth, AM/FM, as well as an auxiliary option to play audio files from an MP3 player or Smart phone. This means users have plenty of options when it comes to selecting music or listening sources. Alongside these options, there is a convenient interface for users to select their preferred radio stations as well as store an MP3/USB device. This radio is also capable of USB charging (when connected via AC or Battery), but it DOES NOT charge Lithium Ion batteries.