On Fri, 31 Jan 2014 17:42:44 -0500, TJ wrote:

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

Yeah. Maybe. I get your point.
But, I think that there is something *wrong* that I can diagnose and fix.

1. It could be rogue apps sucking power.
2. The battery tests good - but it could be the battery.
3. The charger needs to be tested to see what current it supplies.
4. It could be a design flaw

I'm sure there are lots of potential reasons, but, what I'm going
to do is try to measure the actual current in the USB cable.

For that, I plan to sacrifice a cable and hook up some test leads.