... & CE & RoHS)DC connector spec.:A 6.0*4.4mm pin 1.0 For Sony 16V/3.42A,16V/3.75A ... :15V/3A,15V/4A,15V/5A etcC 5.5*2.5mm For IBM:19V/3.42A;DELL:19V/3.16A,19V ... ;Nec:19V/2.64A etc.G 5.5*3.0mm pin 10 For Samsung 19V/3.16A,19V/3.75A etc ... .8A,22V/2.04A etc.I 7.4*5.0mm pin 0.6 (Optional) For DELL:19.5V/3.34A,19 ... ,3.5A, 18.5V 4.74A specialK 7.9*5.5mm pin 1.0 (Optional) For IBM/LENOVO:20V/4.5A,20V ...