Energy efficient Routing is one of the key issues in MANETs due to their highly dynamic topology and limited battery power at the nodes. In particular identifying energy efficient routing is the most important design criterion in static and dynamic ad-hoc networks. Power failure of a mobile node not only affects the node itself but also reduces the overall network lifetime. The goal of this paper is to facilitate research efforts in combining existing solutions in order to offer a more energy efficient routing approach. Towards this goal, we compared the performance of three routing protocols AODV, DSR and WRP for mobile ad-hoc networks in static and dynamic scenarios. Our evaluation considers mainly the energy consumed by each protocol both in uniform and random placement strategies. We have used the GloMoSim network simulator to implement the proposed work.