A mobile Ad hoc network (MANET) is a collection of wireless nodes that forms a network without central administration. The nodes in such kind of network serve as routers as well as hosts. The nodes can forward packets on behalf of other nodes and run user applications. These devices are operated on battery which provides limited working capacity to the mobile nodes. Power failure and the energy consumption of the nodes is a critical factor in the operation of a mobile ad hoc network. The performance of the node can be hampered by power failure, which affects the ability of node to forward the packet and hence affects overall network lifetime. So an important objective is to consider Energy Aware design of network protocols for Ad hoc network environment. Different approaches can be applied to achieve the target and different energy-related metrics that have been used to determine energy efficient routing path. More efficient algorithm is proposed here, which tries to maximize the lifetime of network by minimizing the power consumption during the route establishment from source to destination. The proposed algorithm is incorporated with the route discovery phase of AODV and by simulation using NS/2 it is observed that the proposed algorithm is better than AODV in terms of packet delivery ratio and network lifetime.