The two biggest drains on the iPhone are the Bluetooth radio and WI_FI..  It's 
easy to tell Siri, turn bluetooth off and she'll say I turned Bluetooth off.  
Do the same with WI_FI.  Those are the two biggest battery drains.  So if you 
have no ear peace connected to Bluetooth and your away from your home network, 
you don't need the WI_FI either.  And, it can quickly be turned back on again 
when need be.

HTH


Alan

Sent from my iPad Air

> On Feb 8, 2014, at 3:10 PM, Adrienne Sinclair Chalmers 
> <[email protected]> wrote:
> 
>    Hi
> 
> Of course it's true that some apps use  more power than others, but if a 
> phone is draining, then the most obvious explanation is that one app or 
> another is using the power and it's just an easy thing to eliminate.
> 
> In Mavericks, the battery menu shows you which apps are using significant 
> amounts of power. If there is a similar thing in IOS7, I haven't found it 
> yet. 
> 
> Reducing screen brightness is a really good one too. I always thought it 
> counter-intuitive that the screen curtain didn't reduce power use, but them's 
> the breaks.
> 
> I have absolutely no authority to back this up, but I am convinced I noticed 
> a reduction in power usage on my 5s after I locked the screen orientation.
> 
> Best
> 
> Adrienne 
> 
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