Disclosed a system and method of lengthening a life span of a battery power supply in an appliance such as a portable appliance, notebook computer or the like. A power saving method in an appliance includes displaying a user set-up menu for a power saving on a screen by respectively checking systems...http://www.google.com/patents/US6751561?utm_source=gb-gplus-sharePatent US6751561 - Power saving method and apparatus for a portable appliance
