PokeBatterySaver is an application for ROOT users to lower power consumption while playing Pokémon GO. No other Battery Saver for Pokémon GO" works this deep in the system. It requires Root access because it changes Kernel parameters that no other app like this does.
The download of this application is 100% safe. Francisco Franco is the official developer of the app that can be found in the Tools category. Battery Saver for Pokémon™GO has been downloaded and set up by over 5K users and the most recent update is dated Aug 18, 2016.