Recent technological advances in communications and computation have enabled the event of low-priced, low-power, tiny in size, and multifunctional device nodes during a wireless device network. Since the radio transmission and reception consumes lots of energy, one in all the necessary problems in wireless device network is that the inherent restricted battery power inside network device nodes. Therefore, battery power is crucial parameter within the formula style to extend period of time of nodes within the network. Additionally to maximising the period of time of device nodes, it's preferred to distribute the energy dissipated throughout the wireless device network so as to maximise overall network performance. Abundant analysis has been worn out recent years, investigation completely different aspects like, low power protocols, network institutions, routing protocol, and coverage issues of wireless device networks. There are a unit numerous routing protocols like location-aided, multi-path, knowledge centrical, mobility-based, QoS based, heterogeneity-based, hierarchical routing, hybrid routing, etc., during which best routing is achieved within the context of energy. During this paper, the main target is especially driven over the energy-efficient hierarchical cluster-based LEACH protocol beside the reviews of varied technologies introduced for Wireless device Network.