T-Quick&reg; 19V4.74A AC Adapter Laptop Charger for HP Pavilion G4 G6 G7 M6; EliteBook 2570p 6930p 8440p 8460p 8540w Revolve 820 840 850 Folio 9470m; HP G56 G60 G61 G62 G71 G72 250; ProBook 450