... central pin inside 5.Compatible Models:Dell Inspiron 300M, 500M, 505M, 510M, 600M, 630M, 640M, 700M, 710MDell Inspiron 1420, 1501, 1521 ... .This AC adapter is available for:Dell Inspiron: 300M, 500M, 505M, 600M, 700M, 1150, 6000, 8500, 8600, 9200, 9300Dell Latitude: D400 ...