power save mode

from The Free On-line Dictionary of Computing (8 July 2008)

power save mode

   <architecture> A feature of a component or subsystem designed
   to actively reduce its power consumption when not in use.
   Almost any electronic device might benefit from having a power
   save mode but the most common application is for portable
   computers which attempt to conserve battery life by
   incorporating power saving modes in the {CPU}, display, disks,
   printer, or other units.

   (1995-10-14)