I exclusively use the screen curtain, and the battery life on my phone 
exceeds expectation.
I use the iPhone 5 with the latest update, and apps update automatically, 
and my bluetooth and WIFI are always on.
Glenn
----- Original Message ----- 
From: "Bryan Jones" <openses...@me.com>
To: "OS X & iOS Accessibility" <mac-access@mac-access.net>
Sent: Saturday, May 10, 2014 9:27 AM
Subject: Re: Screen curtain on iPhone


Last I heard, the official word from Apple Accessibility was that the IOS 
screen curtain has no effect on battery life. BTW, though I’ve done no 
official testing, my personal experience leads me to believe this also holds 
true for the MacOS screen curtain on Macbooks.

Bryan

On May 10, 2014, at 9:45 AM, Glenn <glenner...@cableone.net> wrote:
> I would think that screen curtain being on would save more battery life, 
> as
> I'm sure that even when it is set to zero, display processes are still 
> being
> sent to the screen, and when screen curtain is on, I'm guessing that the
> processes are not calculated by the processor.
> Glenn
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