I also know that having bluetooth turned on when not using a bluetooth
device is a battery drain so I keep mine turned off except when using a
keyboard, speaker etc.
Live simply,
Love generously,
Care deeply,
Speak kindly
And leave the rest to God!
----- Original Message -----
From: "David Chittenden" <dchitten...@gmail.com>
To: <viphone@googlegroups.com>
Sent: Sunday, February 09, 2014 11:32 AM
Subject: Re: battery drainage
Actually, the sole biggest drain on the battery is the GPS receiver. When
the GPS receiver is running, one can expect to get two to three hours of
battery life.
The second biggest drain is the iPhone's phone transceiver.
The third biggest drain on the battery life is most likely the combination
of the touch-screen and the back-light. Turning the back-light down to its
lowest setting will significantly help. Of course, locking the screen is the
only way to deactivate the touch-screen.
Wifi is probably the fourth biggest battery drain, but only when wifi is
actually carrying an internet signal. I leave wifi on and, unless I have
active throughput, the battery drain is rather minimal.
After wifi, the fancy graphical parallax features provide a decent battery
hit. This can be disabled in accessibility.
Though many do not believe it, Bluetooth is actually a quite minimal battery
drain. If no bluetooth device is connected, the drain to the battery is
about 1% per hour. When a bluetooth device is connected, the drain ranges
from 3% to 7% per hour, depending on how strongly the iPhone needs to push
the bluetooth signal. For instance, the closer the device is to the iPhone,
the less signal strength is required. That said, the exception is when using
an earpiece, and the iPhone is against the body on the other side of the
body. The human body is made primarily of water, and water absorbs radio
signals. Therefore, the iPhone is required to bump the bluetooth antenna up
to maximum which gives a very significant signal drain, and skews battery
observation / testing with bluetooth devices.
David Chittenden, MSc, MRCAA
Email: dchitten...@gmail.com
Mobile: +64 21 2288 288
Sent from my iPhone
On 10 Feb 2014, at 6:29, Alan Paganelli <alanandsuza...@earthlink.net>
wrote:
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
<chalmer...@googlemail.com> 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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