Wireless Sensor Networks is one of the hottest topic and growing area now days. WSN have become popular due to its wide range applications. There are lots of problems in Wireless sensor networks related to Power, Cost, and Bandwidth etc. Power optimization is the main constraint in WSN and this limitation with a typical deployment of huge figure of nodes has added challenges to the design and management of WSN. They are typically used for remote environment monitoring in areas where providing electrical power is difficult. Therefore, the devices need to be powered by batteries and alternative energy sources. The energy of battery is limited in Wireless sensor Networks.