I was receveing many PMs about this app so i decided to make a thread so everyone can see and use this app. You can use this app on any gingerbread based roms ( like cm based and stock based ) and on any ICS or Jellybean based rom too.
This is the app that all of us lost when we install our first rom, and many people miss this app, so now you can use it on ur favorite rom, it's pretty light and i didnt face any lagg with it. This app only works as a battery saver and not as a task manager like some other similar apps.
Download the attachment and just install it as normal apk. Enjoy it