A portable computer system having automatic power cutoff function is disclosed. The main power supply of the portable computer is interrupted before connecting with an expansion system. The automatic power off operation is performed by a lever 50 and a power switch 41 arranged in the portable computer....http://www.google.de/patents/US6005769?utm_source=gb-gplus-sharePatent US6005769 - Computer and computer system having a function of auto power off before connecting with an expansion system and having push button control thereof
