19.5V2.31A Ultrabook DC Car Charger Adapter for HP EliteBook 820 G3 820 G4 840 G3 840 G4 1040 G2 1040 G1 1040 G3 1030 G1 725 19.5V2.31A Ultrabook DC Car Charger Adapter for HP EliteBook 820 G3 820 G4 840 G3 840 G4 1040 G2 1040 G1 1040 G3 1030 G1 725. Sale price : $13.94 Category : Computer & Office