Before ordering this replacement sony vgp-ac19v73 ac adapter, you MUST check your laptop’s input voltage and your original ac adapter’s output voltage. Laptops with 18V~20V input voltage can use our ac adapter which has 19V output voltage; Laptops with 15V~17V input voltage can use our ac adapter which has 16V output voltage; Remember : never exceed ±1V tolerance. Using wrong output voltage adatper will damage your laptop computer.Different laptops have different connectors. You need the right tip for your laptop. This is very simply to find. Basically,sony vgp-ac19v73 laptop AC adapters comprise of 2 ends. One end is male power outlet. You use this end to plug into wall power outlet. The other end is called “TIP” which you will plug this tip into the “DC IN” in your laptop. Your laptop won’t work on the wrong tip. You can only use the ” matching Tips” Warning : DO NOT try to force wrong tip in your laptop.Replacement For Sony VGP-AC19V73 Adapter is rated at 19.5V 2A 44W.The high quality laptop charger for sony vgp-ac19v73 provides your laptop with safe and reliable power.It is over Charge protection, Voltage protection, Temperature protection, Short circuit protection, enjoys 1-Year Warranty,60-Day Money Back!Welcome to replacement laptop AC power adapters online store.Replacement Sony Laptop AC Adapters and Power Supply for Notebook Computers.Replacement laptop AC adapter is guaranteed to meet or exceed original Sony laptop AC adapter.Full 2 hours burning test; 3 times quality check and 2 times drop test by QC before package.Warranty and Guarantee: 1 year warranty, 60 days money back.