"TJ" wrote in message
...
On 01/31/2014 12:17 PM, Danny D. wrote:
On Fri, 31 Jan 2014 07:01:29 -0800, dave wrote:

Turn off GPS.
Turn off mobile data
Voice and Text are not on Mobile Data.

Luckily, I don't even have mobile data.
I do use GPS navigation all the time in the car though.
That's the whole point!

If the phone can't keep up with the GPS while
on the car charger, um, what good is GPS?

Note: I have gone on long trips (4 hours), and
if the battery is charged (say, 50%) it stays
at about that level; but if the battery is low
(say 20%), then the battery steadily depletes.

That's the enigma I'm trying to understand.

Perhaps your best solution would be to use the phone as a phone, and
purchase a separate GPS unit to use for navigation.

I actually find that the iphone 5 does a much better job
as a GPS receiver than the TomTom 710 it replaces and
gets a lot more time on the internal battery with the
GPS turned on too, and is a lot more convenient to use
because it does everything and the TomTom doesnt.