PowerBooks don't support the APM specification, but they have a separate protocol for their PMU (Power Management Unit). There is a free (GPL) daemon called [Scientific Data: User Datagram Protocol] .:: buyandsellhair.com ::. pmud that handles power management; it can monitor the battery level, put the machine to sleep, and set different levels of power consumption. It was written by Stephan Leemburg <stephan at jvc.nl>, and is available from PPC distribution FTP sites. There is also an older utility called .:: slidehtml5.com ::. [Developer Guide: Ruby] .:: fr.enrollbusiness.com ::. .:: telegra.ph ::. snooze available from the same sites that just puts the PowerBook to sleep. .:: xoilacliveio2.amebaownd.com ::. .:: www3.uwsp.edu ::.