Originally Posted by craftycoder
The first thing I'll do though is shut off the microwave triangulation stuff and see what the power draw is like. You can do this as well just by putting the phone in Airplane mode. At least where I ride I don't have any cell coverage anyway. My apps solution (if I can find one) will be more convenient than that.
The phones typically get a location fix from the on-board GPS chip, but putting maps on the screen depends upon a connection to the cell system data, in order to download the maps from Google. No cell connection, no map. Airplane mode would cause the same problem.
Of course, if this app has the map data already loaded, then no issue.