I have several original DELL Loaders The PA-12 is compatible with the following laptop and is 65 watts 19.5 volts and 3.34 amper 7.4x5 MM connector tambourine :

Compatible models of laptop:

Dell Inspiron Series:
300M, 500M, 600M, 640M, 700M, 710M, 1320, 1370, 1410, 1420, 1501, 1520, 1521, 1525, 1526, E1405, E1505, M5010, M5030, N4010, N4020, N4030, N5010, N7010


Dell Latitude Series:
131L, 2100, 2110, D400, D410, D420, D430, D500, D505, D510, D520, D530, D531, D600, D610, D620, D630, D800, D810, D830, D830N, X300, E4200, E4300, E4310,XT, XT2Â

Dell Precision Series:
M20 M70,ÂÂÂ

Dell XPS Series:
M140, M1210,

Dell Vostro Series:
1000, 1014, 1015, 1200, 1220, 1310, 1320, 1400, 1500, 1510, 1520, 3300, 3400, A840, A860, V13

Dell Inspiron 11z Series Laptop Computer,

Dell Inspiron 1110 Series Laptop Computer