GPK Systems 65w Auto Power Adapter for Hp Probook 4320s 4420s 4525s 6450b 6455b 6550b : Hp G42 G42t G60 G61 G62 G62m G62t G72 G72t ; Hp Elitebook 6930p 8530w 8730w ; Hp Envy 14 ; Charger Auto Truck Adapter Car Charger Power Cord Input: DC 11V - 16V Output:18.5V 3.5A 65 Watt Service & Support 1 year warranty Use minimal power this adapter is designed to save energy Designed exclusively for use with the laptops 100% compatibility with the original