This paper evaluates the impact on the performance of limited battery energy devices in ad hoc networks. This investigation arises because the works about ad hoc networks, present in the literature, implicitly assume nodes with an infinite energy resource. This assumption does not consider that a terminal, especially in case of mobility, power itself by means of battery, which can easily exhaust
its energy. When a node switches off, as a consequence of an energy fall, its support to the ad hoc network functionalities, such as routing signaling management and packet forwarding, disappears, with a consequent impact on the global network. To have a more realistic scenario, in this paper all nodes have a limited initial battery energy, which can be exhausted during simulation. The final performance are compared to those obtained with illimited energy to underline differences.

