Danny D. wrote:



Why would a 2.1 Amp charger not be enough to both charge
and run the phone, and why would it lose charge when the
battery is at 17% yet it maintains charge when the battery
is at 65%?
Most likely the electrical connection between the phone
and the car's noisy electrical system was trashing the
GPS receiver. If you know how TINY the GPS signal was at
the ground, you'd marvel that ANY GPS works at all. There is
a 50 W transmitter feeding an omni-directional antenna on
a satellite 400 miles up, that blankets a wide spot on
earth, several thousand miles wide with signal. That leaves
VERY little signal for the receiver to pick up. Any interference
will trash it and it can't get a valid fix.

Jon