What is the difference between an adapter with two prongs and an adapter with three prongs?
An adapter with three prongs has an extra line which connects to the ground. This can protect you in the event of electricity leakage and/or static electricity.
This adapter has been tested and is guaranteed to work with the compatible laptop models.
Compatible Models:
Dell XPS
M1210 / M140 / M1410 / M1530 / M1020
Dell Inspiron
E1405 / E1505 / E1705 /1420 / 1150 / 14 / 12 / 1750 / 1318 / 1410 / 1425 / 1401 / 1427 / 1440 / 1721 / 1720 / 13
1525 / 1520 / 1501 / 1521 / 1526
8600 / 8500
600M / 700M / 710M / 640M / 500M / 300M / 505M / 630M / 510M / 610M
6000 / 6400
Dell Latitude
X300 / E4300
Dell Vostro
1400 / 1000 / 1500 / 1310 / 2510 / 1200 / 1510 / 1320 / 1220
Dell M109S Projector