If you need a worldwide laptop charger for your Dell notebook, LATITUDE-D830-NAC-80 is really a very good choice to you. As there?e different mains supplies in the world, we have installed the input voltage from 100-240V and 50/60HZ while people from all the countries can take this AC adapter in to use. Doubtless, if you have any knowledge about the internal structure and work principle, you must have learned that input voltage range is even more important than the output voltage 19.5V. After all, the output value is produced by AC adapter itself while the input value is impossible to be controlled. Even if it occurs to be instable in the mains supply, LATITUDE-D830-NAC-80 has the ability to handle with these undesirable situations with perfect solutions. Obviously, LATITUDE-D830-NAC-80 is a good transformer and stabilizer to Dell Inspiron, XPS, Vostro, Latitude and Precision computer models.