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What are WakeLocks?

Quoting from our Master-Question:

Apps may request a WAKE_LOCK to keep a device component from "sleeping", so they can perform a task even when the display is turned off. This is very useful in most cases (e.g. keeping the screen on while navigating, keeping WiFi active to stream music) -- but used in the wrong way, it causes your battery to be drained within short term (up to 25% per hour).

Related tags

  • : obviously when "badly used" wakelocks keep the device unnecessarily awake, this has bad influence on how long your battery lasts with one charge

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