As long as your thread has something to do then it will do it, unless some other thread has something to do. The only way to save on battery power is to have all the threads waiting for external events, which is normally the case for user interface threads. Even background worker threads are normally waiting on something. But if you decide to "busy-wait" for things (looping and polling) then your app will be burning battery power unnecessarily. Take a close look at what your thread actually does and look for instances of busy- waiting. Or, if your thread does not wait for anything external then you might as well let it run full-speed. It is going to take the same amount of total cumulative battery power regardless, so you might as well get it over with. Setting thread priorities only affects the relative access to the CPU compared to other threads - not some absolute speed control. If all the other threads in a system are waiting for something then your thread will run full-time regardless of its priority.
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