This thesis focuses on energy considerations in location-aware transmissions, specifically in a MANET, aims at formulation of new metrics related to reliability. These will ultimately serve towards formulating MANETs models for reliability development, enhancements, assessments and predictability aspects, starting from energy considerations and all subsequent engineering features, concerned right from design stages. Simulations over NS-2 have been carried out involving random movements of nodes, random communication scenarios and appropriate topography considerations. Measures for energy considerations were recorded in separate files. Results obtained during simulations have been extended over more metrics formulations. Behaviours of different metrics under different conditions have been recorded and analysed empirically and mathematically. Relationships between these metrics have been investigated, following which guidelines for reliability in MANETs and Ubicomp have been formulated. Theoretical limits of energy savings reachable along with their accompanying metrics for the purpose of Ubicomp topography management must be known. Multiple findings are presented.