ATX, WTX and other standard and proprietary power supply (PSU) cables connectors  > Compaq pinouts
Power supply series 2692, for use with 2690/2690A series Compaq laptop (Compaq LTE).

 The connector is a little different from the picture, the pin order is the same.

Description (may be empty)
1 6,8vdc   0,625Ah (only for charging, I think)
2 12vdc (?!) Not present in the power supply label (maybe not necessary).
3 5vdc  2Ah
4 GND  The metal ring around the pins is connected with GND, same as pin 4.


The power supply label indicates +5v and +6,8v, but I could measure even a +12v in pin 2. 

4 pin Rino proprietary of Compaq LTE Power supply connector layout
4 pin Rino proprietary connector
at the Power supply out
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Compaq LTE Power supply visual pinout:
Compaq LTE Power supply diagram
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