Thanks very much for your concise and clear clarification. Meanwhile I found out how to change the output voltage of the LT1070CT step-up converter to 20V and the T60 is now happily running consuming around 25W (display off but HD and wireless on). - Jos

Thank you very much for your most welcoming message. It struck me that nowhere the maximum input supply voltage could be found. An electronics engineer would be interested to know. I'll probably do a test with my lab power supply but I thought a friendly soul on this forum knew already. - J

The T60 needs 20V DC input voltage but what would be the maximum power supply voltage? I'm asking because I have a spare 12V to 24V up converter lying around which could be put to good use. Does anybody know or point me in right direction? Thanks - Jos