My suggestion is for you to read in this forum about android and Google's thoughts about battery saving and the way android is developed. To me after reading that and spending 3+ years rooting,building roms, and helping new users; there is no need for a battery saving app. It reminds me of movie "Tommy boy" when Farley tells the guy if you want me to take a dump in a box and stamp guarantee on it I will. I have plenty of time. The only thing your guaranteed is getting a piece of... You know the rest of the quote. And that us what I think about battery savers, task killers, app killers, and anti virus apps.