... for HP 18.5V 3.5A 7.4*5.0 with pin 1.Models:for HP 18.5V 3.5A 2.Plug spec:7 ... .4*5.0 3.Warranty:1 year ... , nx6325, nx7300, nx7400 Series, nx9420, nw8440 Series, nw9440 Seriestc4200 Tablet PC, tc4400 Tablet PC2510p, 2710p, 6510b, 6515b, 6710b, 6715b, 6720s, 6820s ...