Whaat?! But what about all those posts on xda-developers forum preaching how it will miraculously breathe new life into my battery? No, unfortunately, you’ve been duped. From the words of Dianne Hackborn herself, an engineer of Google’s Android operating system:
It has no impact on the current battery level shown to you.
It has no impact on your battery life.
Deleting it is not going to do anything to make your device more fantastic and wonderful…