android - need better explanation of services with explicid intents -

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There are some intents that I am looking to use and I'm sure they are not registered in manifest such as manifest_screen_off May be.

So when I start the service: 

  context.startService (new intent (reference, service class));   
 Then on, a broadcast receiver registers like this:  
  register receiver (screen receiver, new intent filter (int. Action_sirean_on));   
 and start my onStartCommant return  
 Should the receiver be removed every time the screen is turned off? But this dosent I tried something like this with different receivers- action_battery_changed and they do not work   
    
 "

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