How to Fix Android Battery Life & High idle drain (2016)

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This fix really help for my htc one m8 and one a9 (both running on android marshmallow).
And i hope that this will really work on other android devices

For full song click this link:https://www.youtube.com/watch?v=uyvC5WM_cy8

For full song click this link:
https://www.youtube.com/channel/UCEbPrgvBYTkNUQ7VvnunLPw

Source: Youtube