Item No.: Dell 19.5V 4.62A (7.4*5.0, Black, with pin)
Model: Dell 19.5V 4.62A (7.4*5.0, Black, with pin)
output: 19.5V 4.62A; 90W
Connector: 7.4 mm*5.0 mm, Black, with pin
Input: AC100-240V 50/60Hz
AC Head:

Very Portable design, It can be used for most laptops, be compatible in subsection, For example, The 19V3.42a ～ 19V 4.74a, 65W ～90W, if the required power match in the usable range,and the DC tip match, then it will work.

output: power 20W ～ 40W
Connector: 5.5 mm *2.5 mm;
Input: AC100-240V 50/60Hz
AC Head: clubs shape    
DC cable:1.8m

Item No.: 19V 3.42A(5.5*2.5)
Model: 19V 3.42A(5.5*2.5)
output: 19V 3.42A; 65W
Connector: 5.5 mm *2.5 mm;
Input: AC100-240V 50/60Hz
AC Head: clubs shape