Apps running in the background in android mobile,consumes much battery as apps running at front-end. Researchers at Purdue University and Intel have developed a tool named Hush to overcome the problem. It can save upto 16% of energy. This tool is available in the form of system files.
The Hush system dynamically identifies app background activities that are not useful to the user, experience on a per-app basis and suppresses such background app activities during screen-off to reduce the battery drain.