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The tool is called HUSH, and Purdue created it with the collaboration of Intel and Mobile Enerlytics by monitoring how 2,000 Galaxy S3 & S4 smartphones used power. According to Purdue, 28.9% of battery drain on these devices occurred when the screen of a phone was off. Purdue's professor of electrical and computing engineering, Y. Charlie Hu, states that "During screen-off, the phone hardware should enter the sleep state, draining close to zero power".
