Thus, the really good battery saving apps are for root users only. (androidauthority.com)
While it's understandable for a developer to see root as risky, there are a fair number of root users out there who would love to use some of these apps. (androidheadlines.com)
It's the solution to most (if not all) of the issues rooted users have with modern handsets and services. (howtogeek.com)