Hibernator : Hibernate running apps & save battery (Hibernator : Close apps and save battery) - this app can help you with the rest and the poor performance of your device. His goal is to freeze you don't need processes that make it pretty easy. All you need is to install this application and run the auto freeze, or to set up a list of those services and applications that you do not need. The main thing is not to overdo and not to disable a system service, then your device most likely will turn off.