Before talking about how to get rid of him, let's talk about why he is there in the first place.
Basically, in previous versions of Android there was no real way to find out if an application is running in the background, a bunch of things that it shouldn't do. In most scenarios, these abnormal applications will damage the battery, supporting waking up the system - they are called "wakelocks". In sluts, this kept the system awake. This is bad.
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