Source of 4S Battery Drain?

Discussion in 'iPhone' started by Rocko1, Nov 10, 2011.

  1. Rocko1 macrumors 68020


    Nov 3, 2011

    Discovered this today. The 4S has a infrared sensor firing every time the screen is on. It does not matter if Siri is off, auto brightness is off or you are not on a call. This seems like a waste of resources. I assume the CPU is being utilized for monitoring and power to fire the sensor. 5.0.1 has not changed this behavior. Any comments?

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  2. dffdce macrumors member

    Jun 30, 2010
    Old news and from various sources, "it's most likely using a minuscule amount of power and thus not the cause of battery issues in the 4S"
  3. Small White Car macrumors G4

    Small White Car

    Aug 29, 2006
    Washington DC
    Given that people were reporting 5.0 battery issues with the Siri-less iPhone 4, I can't see how this would be the actual problem.
  4. Rocko1 thread starter macrumors 68020


    Nov 3, 2011
    Does anyone know the purpose of having this working constantly? Seems very inefficient.


    Because many 4S owners were reporting less usage time than 4 with the same OS under exact same usage.

    The 4 does not fire this sensor each time the display turns on, only while on a call.

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