Genuine HP 90W 19V 4.74A 5.5mm Tip AC Power Adapter HSTNN-LA13 603436-001.Model Number: HSTNN-LA13HP Part Number: 603436-001Compatible Part Numbers: PA-1900-34HPSpecifications:Watts: 90WInput: 100-240V ~ 1.6A 50-60HzOutput: 19V - 4.74AConnector: 5.5mm (outside) / 2.5mm (center) right angle barrel