Hipower DC Car Automobile Power Adapter Charger For HP Probook 4310, 4310S, 4320, 4320S, 4320T, 4420, 4425, 4420S, 4425S, 4430S, 4435S, 4510, 4515, 4510S, 4515S, 4520, 4525, 4520S, 4525S, 4530S, 4535, 4535S, 4720, 4720S Laptop Notebook Computers DC Input: 11-15V DC (** This is a DC power adpater for use in vehicles. This is NOT an AC wall adapter for use in homes **) Voltage Rating: 19.00V Output Watts: up to 65W maximum Amps: up to 3.42A maximum Connector Plug: Barrel With Center Pin