Compaq 18.5V 3.8A 
Specification:
Input: AC 100-240V, 50-60Hz

Output: DC 18.5V 3.8A

Connector: 4.8-1.7mm


Compatible:  
Compaq Armada 110 E500 E500S E700 M300 M700 V300
 
Compaq EVO N110 N150 N200 N400C N600C N800C N800V N410C 1640 305
 
Compaq Prosignia 140 150 160 165 170SMB 190SMB