90W AC Adapter for HP Docking Station XB4 Elitebook 2740p 8440p&nbsp;Notebook Laptop Battery Charger DC-Output : 19V-4.74A-90W - Input : 100-240V - 1.5A 50/60 Hz DC Connecter size: Internal Diameter: 5.0mm, External Diameter: 7.4mm; With central smart-pin 100% OEM Compatible,Compatible with: HP Pavilion G4 G6 G6t G7 M6 M7, HP Pavilion Dm1 DM1z Dm4 Dm4t Dv4 Dv4t Dv5 Dv5t Dv6 Dv6t Dv7 Dv7t, HP EliteBook 745 820 840 850 G1 G2; 2170p 2530p 2540p 2560p 2570p 2730p 2740p 2760p 6930p 8440p 8460p 8470p 8530w 8540p 8540w 8560p 8570p , HP Probook 430 440 450 455 640 650 G1 G2; 4420s 4430s 4440s 4510s 4520s 4525s 4530s 4535s 4540s 4545s 4730s 6360b 6450b 6455b 6460b 6470b 6475b 6550b 6555b 6560b 6570b Fit Model:HP Docking Station KG461AA XB4 Elitebook 2530p 2540p 2560p 2730p 2740p 2760p 8440p 8440w 8460p 8460w 8560p XU057UT Mini-Note 2133 KX869AT This Product Has 12 Months Replacement Warranty