Source of 4S Battery Drain?

[Rocko1]

http://www.youtube.com/watch?v=Wdf2-VJvX8M

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?

 

[dffdce]

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"

 

[Small White Car]

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.

 

[Rocko1]

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"

Does anyone know the purpose of having this working constantly? Seems very inefficient.

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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.

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.