The Battery Charger Won't Keep Up when using G-Map and the GPS is tracking. I have a couple Xtreme Mac Car Chargers for the 1st iPhone. I purchased an iPhone 3GS. I have G-Map West with the Windshield mount. When using the G-Map Application, with the GPS tracking, my Car Charger lets my iPhone slowly discharge. In other words, the iPhone seems to be using more current than the Charger/Adapter can supply. I have emailed Xtreme Mac about this with NO answer from them. I have thought of breaking apart one of the adapters to see if I could play with a resistor change to address more current flow but am afraid the casing may not disassemble easily. What I'm wondering is, did the manufacturers of the different Adapters allow for more current usage when the iPhone 3G, or 3Gs was released. Does anyone else have any experience along these same lines, and what charger did you find that works now. I'm only interested in replies that have had earlier adapters that didn't work, and have now found one that actually charges instead of discharging. I did a search and found nothing so sorry if this Has already been addressed.