We have 2 battery saver apps one is root and one is not root.. Craig's Root Battery Saver! Not rooted?... download the not root version from below https://play.google.com/store/apps/details?id=craigs.nonroot.batterysaver Rooted Users... (This works when you switch your phone screen off like a normal day at work or school... using this while playing games won't save you power while the game plays but will save you hours off life during the time not in use , the savings happen when the screen goes off during a normal days use or while you sleep!) Material Design Implemented Only 5 meg of memory after a reboot! on/off sms commands now toggle off wifi and switch on 3G (as 9/10 wifi is not avail) any issues, email from the menu in the app (swipe from the left of the screen for the menu options) *Autostarts manager *Auto Task manager *Full Hardware support *Control via SMS commands simply sending text on/off via sms (Precise Lost/Stolen position (in conjunction with apps like Where's My droid)) so even if you lose or have your phone stolen, sending on will enable 3g/wifi/bt/gps etc for apps like WMD to get your precise location.. * saves you money on mobile data connection data by making sure your mobile data is off when the screen goes off! *Double even triple your Battery Life! *Autostarts manager / boot reciever cleaner (simply click on the clean button/clean) to give a like new device! *Faster battery charging! *Phone runs cooler when not in use! *Full hardware support 4.4/5/6 Fully supports kitkat/lollipop+ for advanced power management *Supports 4.1 to 4.4 as well but it has no ability to turn off GPS (which leaving on will consume no power anyway when off) *low memory footprint after reboot! Enjoy your extended battery life! (if you've not rooted your device or don't know what root means, this is not for you) https://play.google.com/store/apps/details?id=saver.battery.craigs.craigsbatterysaver If you need help, just reply, suggestions welcome, always being updated, thanks!