K.O.T.W

Hey Guys, My Name's Ben, and I'm the forum newbie from Sydney. My friend is offloading his Sharp MD-MT180 Portable Minidisc Recorder for $30, and I was seeking some advice on the device, in regards to whether I should buy it. As a radio host, I need a minidisc recorder to record any interviews I do outside of the studio, but this Sharp one only has a Line In and a Headphones input. If I plug the mic into the Line In input, will that work? Also how easy is it to buy a charger for the AD-N55BT Rechargable Battery? Thanks in advance for your help, Ben.