The new generations of Portable Electronic devices are intended to provide a wide range of information, services and receiving a large volume of information, data, image and video so on. Further, portable electronic devices have integrated and advanced function like multimedia portable communication, monitoring and control facilities including high resolution video transmission, selection of services and application by customer i.e. monitoring and control of industrial applications, weather forecasting, location services and connection with other transmission media as well as achieving higher level of security and authentication. Wide coverage of future Portable electronic device services being provided through portable devices are on the rise and new technologies put more computing power in these small devices. However, the slow up gradation of battery technology forms an ultimate constraint on running heavier application on these devices. To prolong battery life, many power saving techniques are being used at all levels of system design. In this paper, we have described the concept of the reversible logic gates which may be used for replacement of conventional logic gate in the design of digital integrated circuit for portable devices to reduce power dissipation resulting prolonged battery life.