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Sensors in sensor networks have limited energy and in large-scale sensor networks, communication between sensor nodes is necessary to cover a large monitoring region, thus energy preserving techniques are important. In this paper, we propose a hybrid protocol, which we will call collectively Chain-based LEACH (CBL) that improves the Low-Energy Adaptive Clustering Hierarchy (LEACH) to significantly reduce energy consumption and increase the lifetime of a sensor network. Our protocol uses LEACH and the advantages of Power-Efficient GAthering in Sensor Information Systems (PEGASIS) and avoids their disadvantages. LEACH technique improves energy efficiency of a sensor network by selecting a cluster-head, and having it aggregate data from other nodes in its cluster, and PEGASIS is a near optimal chain-based protocol that we used for communication and extra aggregation between cluster-heads that are neighbours and takes turns transmitting to the sink. Simulation results show that CBL performs better than LEACH.